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foraminifera</title> <meta name="description" content="Search results for: benthic foraminifera"> <meta name="keywords" content="benthic foraminifera"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="benthic foraminifera"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 78</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: benthic foraminifera</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">78</span> Benthic Foraminiferal Responses to Coastal Pollution for Some Selected Sites along Red Sea, Egypt</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ramadan%20M.%20El-Kahawy">Ramadan M. El-Kahawy</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20El-Shafeiy"> M. A. El-Shafeiy</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Abd%20El-Wahab"> Mohamed Abd El-Wahab</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20Helal"> S. A. Helal</a>, <a href="https://publications.waset.org/abstracts/search?q=Nabil%20Aboul-Ela"> Nabil Aboul-Ela</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Due to the economic importance of Safaga Bay, Quseir harbor and Ras Gharib harbor , a multidisciplinary approach was adopted to invistigate 27 surfecial sediment samples from the three sites and 9 samples for each in order to use the benthic foraminifera as bio-indicators for characterization of the environmental variations. Grain size analyses indicate that the bottom facies in the inner part of quseir is muddy while the inner part of Ras Gharib and Safaga is silty sand and those close to the entrance of Safaga bay and Ras Gharib is sandy facies while quseir still also muddy facies. geochemical data show high concentration of heavy-metals mainly in Ras Gharib due to oil leakage from the hydrocarbon oil field and Safaga bay due to the phosphate mining while quseir is medium concentration due to anthropocentric effect.micropaelontological analyses indicate the boundaries of the highest concentration of heavy metals and those of low concentration as well.the dominant benthic foraminifera in these three sites are Ammonia beccarii, Amphistigina and sorites. the study highlights the worsening of environmental conditions and also show that the areas in need of a priority recovery. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=benthic%20foraminifera" title="benthic foraminifera">benthic foraminifera</a>, <a href="https://publications.waset.org/abstracts/search?q=Ras%20Gharib" title=" Ras Gharib"> Ras Gharib</a>, <a href="https://publications.waset.org/abstracts/search?q=Safaga" title=" Safaga"> Safaga</a>, <a href="https://publications.waset.org/abstracts/search?q=Quseir" title=" Quseir"> Quseir</a>, <a href="https://publications.waset.org/abstracts/search?q=Red%20Sea" title=" Red Sea"> Red Sea</a>, <a href="https://publications.waset.org/abstracts/search?q=Egypt" title=" Egypt"> Egypt</a> </p> <a href="https://publications.waset.org/abstracts/14580/benthic-foraminiferal-responses-to-coastal-pollution-for-some-selected-sites-along-red-sea-egypt" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14580.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">351</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">77</span> Seasonal Variations, Environmental Parameters, and Standing Crop Assessment of Benthic Foraminifera in Western Bahrain, Arabian Gulf</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Arslan">Muhammad Arslan</a>, <a href="https://publications.waset.org/abstracts/search?q=Michael%20A.%20Kaminski"> Michael A. Kaminski</a>, <a href="https://publications.waset.org/abstracts/search?q=Bassam%20S.%20Tawabini"> Bassam S. Tawabini</a>, <a href="https://publications.waset.org/abstracts/search?q=Fabrizio%20Frontalini"> Fabrizio Frontalini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We conducted a survey of living benthic foraminifera in a relatively unpolluted site of Bahrain in the Arabian Gulf, with the aim of determining the seasonal variability in their populations, as well as various environmental parameters that affect their distribution. The maximum standing crop was observed during winter, with highest population of rotaliids, followed by a peak in miliolids. The highest population is attributed to an increasing number juveniles observed along the depth transect. A strong correlation between sediment grain size and the foraminiferal population indicates that juveniles were most abundant on coarser sandy substrate and less abundant on fine substrate. In spring, the total living population decreased, and lowest values are observed in the summer. The population started to increase again in the autumn with highest juveniles/adult ratios. Moreover, results of relative abundance and species consistency show that Ammonia is found to be consistent from the shallowest to the deepest station, whereas miliolids start appearing in the deeper stations. The average numbers of Peneroplis and Elphidium also increases along the depth transect. Environmental characterization reveals that although the site is subjected to eutrophication caused by nitrates and sulfates, pollution caused by hydrocarbons and heavy metals is not significant. The assessment of 63 heavy metals showed that none of the metals had concentrations that exceed internationally accepted norms [the devised level of Effect Range-Low], with the exception of strontium. The lack of a significant environmental effect of heavy metals is confirmed by a Foraminiferal Deformities Index value of less than 2%. Likewise, no hydrocarbon contamination was detected in the water or sediment samples. Lastly, observations of cytoplasmic streaming and pseudopodial activity in Petri dishes suggest that the foraminiferal population is not stressed. We conclude that the site in Bahrain is not yet adversely affected by human development, and therefore can provide baseline information for future comparison and assessment of foraminiferal assemblages in contaminated zones of the Arabian Gulf. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arabian%20Gulf" title="Arabian Gulf">Arabian Gulf</a>, <a href="https://publications.waset.org/abstracts/search?q=benthic%20foraminifera" title=" benthic foraminifera"> benthic foraminifera</a>, <a href="https://publications.waset.org/abstracts/search?q=standing%20crop" title=" standing crop"> standing crop</a>, <a href="https://publications.waset.org/abstracts/search?q=Western%20Bahrain" title=" Western Bahrain"> Western Bahrain</a> </p> <a href="https://publications.waset.org/abstracts/20722/seasonal-variations-environmental-parameters-and-standing-crop-assessment-of-benthic-foraminifera-in-western-bahrain-arabian-gulf" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20722.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">643</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">76</span> Foraminiferal Description and Biostratigraphy of Eocene Deposits in Zagros Basin (Izeh and Interior Fars Sub-Basins) in South-West of Iran</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ronak%20Gravand">Ronak Gravand</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Eocene deposits in Zagros basin in tow zones of interior Fars and Izeh include limestone and marly limestone succession along with abundant fossils. The significance of this area is due to its hydro carbonic resources. In Dashte Kuh section, limestone and marly limestone deposits with medium to thick creamy layers containing benthic foraminifera could be seen. Bio-zones identified in such deposits include Opertorbitolites Subzone, Somalina Subzone, Alveolina Nummulites Assemblage Subzone and Nummulites fabianii Silvestriella tetraedra Assembelage Zone. In Nil Kuh section, marly limestone of the succession contain abundant plagic foraminifera. The zones identified in this succession include Morozovella aragonesis Range Zone, Hantkenina nuttalli Range Zone, Hantkenina nuttalli Turborotalia cerro-azulensis Interval Zone, Turborotalia cerro-azulensis Range Zone and Morozovella aragonesis Range Zone. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=zagros%20basin" title="zagros basin">zagros basin</a>, <a href="https://publications.waset.org/abstracts/search?q=foraminifera" title=" foraminifera "> foraminifera </a>, <a href="https://publications.waset.org/abstracts/search?q=biozone" title=" biozone"> biozone</a>, <a href="https://publications.waset.org/abstracts/search?q=Iran" title=" Iran"> Iran</a> </p> <a href="https://publications.waset.org/abstracts/12893/foraminiferal-description-and-biostratigraphy-of-eocene-deposits-in-zagros-basin-izeh-and-interior-fars-sub-basins-in-south-west-of-iran" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12893.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">501</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">75</span> Bioecological Assessment of Cage Farming on the Soft Bottom Benthic Communities of the Vlora Gulf (Albania)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ina%20Nasto">Ina Nasto</a>, <a href="https://publications.waset.org/abstracts/search?q=Denada%20Sota"> Denada Sota</a>, <a href="https://publications.waset.org/abstracts/search?q=Pudrila%20Hasko%C3%A7elaj"> Pudrila Haskoçelaj</a>, <a href="https://publications.waset.org/abstracts/search?q=Mariola%20Ismailaj"> Mariola Ismailaj</a>, <a href="https://publications.waset.org/abstracts/search?q=Hajdar%20Kicaj"> Hajdar Kicaj</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Most of the fishing areas of the Mediterranean Sea are considered to be overfished, consequently fishing has decreased or is static. Considering the continuous increase in demand for fish, the option of aquaculture production has had a growing development in recent decades. The environmental impact of aquaculture in the marine ecosystem has been a subject of study for several years in the Mediterranean. In the case of the Albanian waters, and in particular the Gulf of Vlora, have had a progressive growing of aquaculture activity in the last twenty years. Given the convenient and secluded location for tourist activities, the bay of Ragusa was considered as the most suitable area to install the aquaculture cage system for the breeding of sea bass and sea bream. The impact of aquaculture in on the soft bottom benthic communities has been assessed at the biggest commercial fish farm (Alb-Adriatico Sh.P.K) established in coastal waters of Ragusa bay 30–50 m deep, in the southern part of the Gulf of Vlora. In order to determine if there is a possible impact on the aquaculture cage in benthic communities, a comparative analysis was undertaken between transects and samples with differences in distances between them and with a gradient of distance from the fish cages. A total of 275 taxa were identified (1 Foraminifera, 1 Porifera, 3 Cnidaria, 2 Platyhelminthes, 2 Nemertea, 1 Bryozoa, 171 Mollusca, 39 Annelida, 35 Crustacea, 14 Echinodermata, 1 Hemichordata, and 5 Tunicata). The anaysis showed three main habitats in the area: biocoenosis of terrigenous mud, residual areas with Possidonia oceanica and also residual assemblages of algal coralligenous. Four benthic biotic indexes were calculated (Shannon H ’, BENTIX, Simpson's Diversity and Peilou’s J’) also benthic indicators as total abundance, number of taxa and species frequency to evaluate possible ecological impact of fish cages in Ragusa bay. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bentix%20index" title="Bentix index">Bentix index</a>, <a href="https://publications.waset.org/abstracts/search?q=Benthic%20community" title=" Benthic community"> Benthic community</a>, <a href="https://publications.waset.org/abstracts/search?q=invertebrates" title=" invertebrates"> invertebrates</a>, <a href="https://publications.waset.org/abstracts/search?q=aquaculture" title=" aquaculture"> aquaculture</a>, <a href="https://publications.waset.org/abstracts/search?q=Raguza%20bay" title=" Raguza bay"> Raguza bay</a> </p> <a href="https://publications.waset.org/abstracts/158443/bioecological-assessment-of-cage-farming-on-the-soft-bottom-benthic-communities-of-the-vlora-gulf-albania" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/158443.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">100</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">74</span> [Keynote Speech]: Determination of Naturally Occurring and Artificial Radionuclide Activity Concentrations in Marine Sediments in Western Marmara, Turkey</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Erol%20Kam">Erol Kam</a>, <a href="https://publications.waset.org/abstracts/search?q=Z.%20U.%20Y%C3%BCm%C3%BCn"> Z. U. Yümün</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Natural and artificial radionuclides cause radioactive contamination in environments, just as the other non-biodegradable pollutants (heavy metals, etc.) sink to the sea floor and accumulate in sediments. Especially the habitat of benthic foraminifera living on the surface of sediments or in sediments at the seafloor are affected by radioactive pollution in the marine environment. Thus, it is important for pollution analysis to determine the radionuclides. Radioactive pollution accumulates in the lowest level of the food chain and reaches humans at the highest level. The more the accumulation, the more the environment is endangered. This study used gamma spectrometry to investigate the natural and artificial radionuclide distribution of sediment samples taken from living benthic foraminifera habitats in the Western Marmara Sea. The radionuclides, K-40, Cs-137, Ra-226, Mn 54, Zr-95+ and Th-232, were identified in the sediment samples. For this purpose, 18 core samples were taken from depths of about 25-30 meters in the Marmara Sea in 2016. The locations of the core samples were specifically selected exclusively from discharge points for domestic and industrial areas, port locations, and so forth to represent pollution in the study area. Gamma spectrometric analysis was used to determine the radioactive properties of sediments. The radionuclide concentration activity values in the sediment samples obtained were Cs-137=0.9-9.4 Bq/kg, Th-232=18.9-86 Bq/kg, Ra-226=10-50 Bq/kg, K-40=24.4–670 Bq/kg, Mn 54=0.71–0.9 Bq/kg and Zr-95+=0.18–0.19 Bq/kg. These values were compared with the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) data, and an environmental analysis was carried out. The Ra-226 series, the Th-232 series, and the K-40 radionuclides accumulate naturally and are increasing every day due to anthropogenic pollution. Although the Ra-226 values obtained in the study areas remained within normal limits according to the UNSCEAR values, the K-40, and Th-232 series values were found to be high in almost all the locations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ra-226" title="Ra-226">Ra-226</a>, <a href="https://publications.waset.org/abstracts/search?q=Th-232" title=" Th-232"> Th-232</a>, <a href="https://publications.waset.org/abstracts/search?q=K-40" title=" K-40"> K-40</a>, <a href="https://publications.waset.org/abstracts/search?q=Cs-137" title=" Cs-137"> Cs-137</a>, <a href="https://publications.waset.org/abstracts/search?q=Mn%2054" title=" Mn 54"> Mn 54</a>, <a href="https://publications.waset.org/abstracts/search?q=Zr-95%2B" title=" Zr-95+"> Zr-95+</a>, <a href="https://publications.waset.org/abstracts/search?q=radionuclides" title=" radionuclides"> radionuclides</a>, <a href="https://publications.waset.org/abstracts/search?q=Western%20Marmara%20Sea" title=" Western Marmara Sea"> Western Marmara Sea</a> </p> <a href="https://publications.waset.org/abstracts/64866/keynote-speech-determination-of-naturally-occurring-and-artificial-radionuclide-activity-concentrations-in-marine-sediments-in-western-marmara-turkey" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/64866.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">421</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">73</span> Diversity and Distribution of Benthic Invertebrates in the West Port, Malaysia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Seyedeh%20Belin%20Tavakoly%20Sany">Seyedeh Belin Tavakoly Sany</a>, <a href="https://publications.waset.org/abstracts/search?q=Rosli%20Hashim"> Rosli Hashim</a>, <a href="https://publications.waset.org/abstracts/search?q=Majid%20Rezayi"> Majid Rezayi</a>, <a href="https://publications.waset.org/abstracts/search?q=Aishah%20Salleh"> Aishah Salleh</a>, <a href="https://publications.waset.org/abstracts/search?q=Omid%20Safari"> Omid Safari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this paper is to describe the main characteristics of macroinvertebrate species in response to environmental forcing factors. Overall, 23 species of Mollusca, 4 species of Arthropods, 3 species of Echinodermata and 3 species of Annelida were identified at the 9 sampling stations during four sampling periods. Individual species of Mollusca constituted 36.4% of the total abundance, followed by Arthropods (27.01%), Annelida (34.3%) and Echinodermata (2.4%). The results of Kruskal-Wallis test indicated that a significant difference (p <0.05) in the abundance, richness and diversity of the macro-benthic community in different stations. The correlation analysis revealed that anthropogenic pollution and natural variability caused by these variations in spatial scales. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=benthic%20invertebrates" title="benthic invertebrates">benthic invertebrates</a>, <a href="https://publications.waset.org/abstracts/search?q=diversity" title=" diversity"> diversity</a>, <a href="https://publications.waset.org/abstracts/search?q=abundance" title=" abundance"> abundance</a>, <a href="https://publications.waset.org/abstracts/search?q=West%20Port" title=" West Port"> West Port</a> </p> <a href="https://publications.waset.org/abstracts/6112/diversity-and-distribution-of-benthic-invertebrates-in-the-west-port-malaysia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6112.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">441</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">72</span> Phylogenetic Analysis and a Review of the History of the Accidental Phytoplankter, Phaeodactylum tricornutum Bohlin (Bacillariophyta)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jamal%20S.%20M.%20Sabir">Jamal S. M. Sabir</a>, <a href="https://publications.waset.org/abstracts/search?q=Edward%20C.%20Theriot"> Edward C. Theriot</a>, <a href="https://publications.waset.org/abstracts/search?q=Schonna%20R.%20Manning"> Schonna R. Manning</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdulrahman%20L.%20Al-Malki"> Abdulrahman L. Al-Malki</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad"> Mohammad</a>, <a href="https://publications.waset.org/abstracts/search?q=Mumdooh%20J.%20Sabir"> Mumdooh J. Sabir</a>, <a href="https://publications.waset.org/abstracts/search?q=Dwight%20K.%20Romanovicz"> Dwight K. Romanovicz</a>, <a href="https://publications.waset.org/abstracts/search?q=Nahid%20H.%20Hajrah"> Nahid H. Hajrah</a>, <a href="https://publications.waset.org/abstracts/search?q=Robert%20K.%20Jansen"> Robert K. Jansen</a>, <a href="https://publications.waset.org/abstracts/search?q=Matt%20P.%20Ashworth"> Matt P. Ashworth</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The diatom Phaeodactylum tricornutum has been used as a model for cell biologists and ecologists for over a century. We have incorporated several new raphid pennates into a three-gene phylogenetic dataset (SSU, rbcL, psbC), and recover Gomphonemopsis sp. as sister to P. tricornutum with 100% BS support. This is the first time a close relative has been identified for P. tricornutum with robust statistical support. We test and reject a succession of hypotheses for other relatives. Our molecular data are statistically significantly incongruent with placement of either or both species among the Cymbellales, an order of diatoms with which both have been associated. We believe that further resolution of the phylogenetic position of P. tricornutum will rely more on increased taxon sampling than increased genetic sampling. Gomphonemopsis is a benthic diatom, and its phylogenetic relationship with P. tricornutum is congruent with the hypothesis that P. tricornutum is a benthic diatom with specific adaptations that lead to active recruitment into the plankton. We hypothesize that other benthic diatoms are likely to have similar adaptations and are not merely passively recruited into the plankton. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=benthic" title="benthic">benthic</a>, <a href="https://publications.waset.org/abstracts/search?q=diatoms%3B%20ecology" title=" diatoms; ecology"> diatoms; ecology</a>, <a href="https://publications.waset.org/abstracts/search?q=Phaeodactylum%20tricornutum" title=" Phaeodactylum tricornutum"> Phaeodactylum tricornutum</a>, <a href="https://publications.waset.org/abstracts/search?q=phylogeny" title=" phylogeny"> phylogeny</a>, <a href="https://publications.waset.org/abstracts/search?q=tychoplankton" title=" tychoplankton "> tychoplankton </a> </p> <a href="https://publications.waset.org/abstracts/91315/phylogenetic-analysis-and-a-review-of-the-history-of-the-accidental-phytoplankter-phaeodactylum-tricornutum-bohlin-bacillariophyta" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91315.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">238</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">71</span> Hydraulic Analysis on Microhabitat of Benthic Macroinvertebrates at Riparian Riffles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jin-Hong%20Kim">Jin-Hong Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydraulic analysis on microhabitat of Benthic Macro- invertebrates was performed at riparian riffles of Hongcheon River and Gapyeong Stream. As for the representative species, <em>Ecdyonurus kibunensis</em>, <em>Paraleptophlebia cocorata</em>, <em>Chironomidae </em>sp. and <em>Psilotreta kisoensis iwata</em> were chosen. They showed hydraulically different habitat types by flow velocity and particle diameters of streambed materials. Habitat conditions of the swimmers were determined mainly by the flow velocity rather than by flow depth or by riverbed materials. Burrowers prefer sand and silt, and inhabited at the riverbed. Sprawlers prefer cobble or boulder and inhabited for velocity of 0.05-0.15 m/s. Clingers prefer pebble or cobble and inhabited for velocity of 0.06-0.15 m/s. They were found to be determined mainly by the flow velocity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=benthic%20macroinvertebrates" title="benthic macroinvertebrates">benthic macroinvertebrates</a>, <a href="https://publications.waset.org/abstracts/search?q=riffles" title=" riffles"> riffles</a>, <a href="https://publications.waset.org/abstracts/search?q=clinger" title=" clinger"> clinger</a>, <a href="https://publications.waset.org/abstracts/search?q=swimmer" title=" swimmer"> swimmer</a>, <a href="https://publications.waset.org/abstracts/search?q=burrower" title=" burrower"> burrower</a>, <a href="https://publications.waset.org/abstracts/search?q=sprawler" title=" sprawler"> sprawler</a> </p> <a href="https://publications.waset.org/abstracts/49551/hydraulic-analysis-on-microhabitat-of-benthic-macroinvertebrates-at-riparian-riffles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49551.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">211</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">70</span> Foraminiferal Associations and Paleoecology of the Oligocene Sediments in Zagros Basin, SW Iran</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tahereh%20Habibi">Tahereh Habibi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Oligocene carbonates are widespread along Fars Province, Zagros Basin, SW Iran. Distribution of planktonic and larger benthic foraminfera, stratal patterns and facies architecture are used as a tool to define microfacies and foraminiferal associations of these strata at Kavar Section. The presence of Nummulites spp. indicated the age of the sequence as Rupelian-Chattian (Nummulites vascus-Nummulites fichteli and Archaias asmaricus/hensoni-Miogypsinoides complanatus assemblage zones). The paleoenvironmental setting is interpreted as a homoclinal ramp environment according to the recognition of eight microfacies types. Four foraminiferal associations are recognized in the investigated ramp setting. They represent a salinity of 34-40 to 50 psu and higher than 50 psu in more restricted conditions. The depth ranges from 200 m as evidenced by the presence of planktonic foraminifera and to less than 30m in the more restricted inner ramp environment. Warm tropical and subtropical water with temperature of 18-25° C is proposed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=foraminiferal%20associations" title="foraminiferal associations">foraminiferal associations</a>, <a href="https://publications.waset.org/abstracts/search?q=microfacies" title=" microfacies"> microfacies</a>, <a href="https://publications.waset.org/abstracts/search?q=oligocene" title=" oligocene"> oligocene</a>, <a href="https://publications.waset.org/abstracts/search?q=paleoecology" title=" paleoecology "> paleoecology </a> </p> <a href="https://publications.waset.org/abstracts/22311/foraminiferal-associations-and-paleoecology-of-the-oligocene-sediments-in-zagros-basin-sw-iran" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22311.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">506</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">69</span> Upper Jurassic Foraminiferal Assemblages and Palaeoceanographical Changes in the Central Part of the East European Platform</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Clementine%20Colpaert">Clementine Colpaert</a>, <a href="https://publications.waset.org/abstracts/search?q=Boris%20L.%20Nikitenko"> Boris L. Nikitenko</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Upper Jurassic foraminiferal assemblages of the East European Platform have been strongly investigated through the 20th century with biostratigraphical and in smaller degree palaeoecological and palaeobiogeographical purposes. Over the Late Jurassic, the platform was a shallow epicontinental sea that extended from Tethys to the Artic through the Pechora Sea and further toward the northeast in the West Siberian Sea. Foraminiferal assemblages of the Russian Sea were strongly affected by sea-level changes and were controlled by alternated Boreal to Peritethyan influences. The central part of the East European Platform displays very rich and diverse foraminiferal assemblages. Two sections have been analyzed; the Makar'yev Section in the Moscow Depression and the Gorodishi Section in the Yl'yanovsk Depression. Based on the evolution of foraminiferal assemblages, palaeoenvironment has been reconstructed, and sea-level changes have been refined. The aim of this study is to understand palaeoceanographical changes throughout the Oxfordian – Kimmeridgian of the central part of the Russian Sea. The Oxfordian was characterized by a general transgressive event with intermittency of small regressive phases. The platform was connected toward the south with Tethys and Peritethys. During the Middle Oxfordian, opening of a pathway of warmer water from the North-Tethys region to the Boreal Realm favoured the migration of planktonic foraminifera and the appearance of new benthic taxa. It is associated with increased temperature and primary production. During the Late Oxfordian, colder water inputs associated with the microbenthic community crisis may be a response to the closure of this warm-water corridor and the disappearance of planktonic foraminifera. The microbenthic community crisis is probably due to the increased sedimentation rate in the transition from the maximum flooding surface to a second-order regressive event, increasing productivity and inputs of organic matter along with sharp decrease of oxygen into the sediment. It is following during the Early Kimmeridgian by a replacement of foraminiferal assemblages. The almost all Kimmeridgian is characterized by the abundance of many common with Boreal and Subboreal Realm. Connections toward the South began again dominant after a small regressive event recorded during the Late Kimmeridgian and associated with the abundance of many common taxa with Subboreal Realm and Peritethys such as Crimea and Caucasus taxa. Foraminiferal assemblages of the East European Platform are strongly affected by palaeoecological changes and may display a very good model for biofacies typification under Boreal and Subboreal environments. The East European Platform appears to be a key area for the understanding of Upper Jurassic big scale palaeoceanographical changes, being connected with Boreal to Peritethyan basins. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=foraminifera" title="foraminifera">foraminifera</a>, <a href="https://publications.waset.org/abstracts/search?q=palaeoceanography" title=" palaeoceanography"> palaeoceanography</a>, <a href="https://publications.waset.org/abstracts/search?q=palaeoecology" title=" palaeoecology"> palaeoecology</a>, <a href="https://publications.waset.org/abstracts/search?q=upper%20jurassic" title=" upper jurassic"> upper jurassic</a> </p> <a href="https://publications.waset.org/abstracts/52734/upper-jurassic-foraminiferal-assemblages-and-palaeoceanographical-changes-in-the-central-part-of-the-east-european-platform" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52734.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">247</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">68</span> Evaluation of Quality of Rhumel Wadi Waters by Physico-Chemical and Biological Parameters</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Djeddi%20Hamssa">Djeddi Hamssa</a>, <a href="https://publications.waset.org/abstracts/search?q=Kherief%20Necereddine%20Saliha"> Kherief Necereddine Saliha</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehennaoui%20Fatima%20Zohra"> Mehennaoui Fatima Zohra</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objectives of this study are to use different parameters to assess the current pollution status of sediments in Rhumel wadi located in the North-East of Algeria (Constantine), two stations were selected in strategic points and sampled at three occasions on Sptember 2014, Junary 2015 and April 2015. Parameters used in this study were a physico-chimical analysis of water (pH, CE, Dissolved O2), sediments (pH, CE, CaCo3, MO) and contamination level of sediments by cadmium, completed by biological testing and analysis of existing benthic community. The results of the physico-chemical parameters show that the water temperature is average and seasonal, the pH value is acidic, does not exceed 6.64. The amplitude variation may be important from upstream to downstream. The generally high electrical conductivity, for the carbonate nature of the watershed increases from upstream to downstream. The waters of the Rhumel wadi are excessively mineralized, dissolved oxygen, a vital factor for benthic community wildlife downstream decreases with increasing organic loading; oxygen is consumed by the microorganisms to its degradation. Analysis of the benthic fauna and calculating the biotic index show a clear excessive pollution for both upstream and downstream stations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biological%20analysis" title="biological analysis">biological analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=benthic%20fauna" title=" benthic fauna"> benthic fauna</a>, <a href="https://publications.waset.org/abstracts/search?q=sediments%20contamination" title=" sediments contamination"> sediments contamination</a>, <a href="https://publications.waset.org/abstracts/search?q=cadmium" title=" cadmium"> cadmium</a> </p> <a href="https://publications.waset.org/abstracts/39508/evaluation-of-quality-of-rhumel-wadi-waters-by-physico-chemical-and-biological-parameters" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/39508.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">250</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">67</span> Construction of Microbial Fuel Cells from Local Benthic Zones</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maria%20Luiza%20D.%20Ramiento">Maria Luiza D. Ramiento</a>, <a href="https://publications.waset.org/abstracts/search?q=Maria%20Lissette%20D.%20Lucas"> Maria Lissette D. Lucas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Electricity is said to serve as the backbone of modern technology. Considering this, electricity consumption has dynamically grown due to the continuous demand. An alternative producer of energy concerning electricity must therefore be given focus. Microbial fuel cell wholly characterizes a new method of renewable energy recovery: the direct conversion of organic matter to electricity using bacteria. Electricity is produced as fuel or new food is given to the bacteria. The study concentrated in determining the feasibility of electricity production from local benthic zones. Microbial fuel cells were constructed to harvest the possible electricity and to test the presence of electricity producing microorganisms. Soil samples were gathered from Calumpang River, Palawan Mangrove Forest, Rosario River and Batangas Port. Eleven modules were constructed for the different trials of the soil samples. These modules were made of cathode and anode chambers connected by a salt bridge. For 85 days, the harvested voltage was measured daily. No parameter is added for the first 24 days. For the next 61 days, acetic acid was included in the first and second trials of the modules. Each of the trials of the soil samples gave a positive result in electricity production.There were electricity producing microbes in local benthic zones. It is observed that the higher the organic content of the soil sample, the higher the electricity harvested from it. It is recommended to identify the specific species of the electricity-producing microorganism present in the local benthic zone. Complement experiments are encouraged like determining the kind of soil particles to test its effect on the amount electricity that can be harvested. To pursue the development of microbial fuel cells by building a closed circuit in it is also suggested. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=microbial%20fuel%20cell" title="microbial fuel cell">microbial fuel cell</a>, <a href="https://publications.waset.org/abstracts/search?q=benthic%20zone" title=" benthic zone"> benthic zone</a>, <a href="https://publications.waset.org/abstracts/search?q=electricity" title=" electricity"> electricity</a>, <a href="https://publications.waset.org/abstracts/search?q=reduction-oxidation%20reaction" title=" reduction-oxidation reaction"> reduction-oxidation reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=bacteria" title=" bacteria"> bacteria</a> </p> <a href="https://publications.waset.org/abstracts/5475/construction-of-microbial-fuel-cells-from-local-benthic-zones" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5475.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">400</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">66</span> Assessing the Impact of Heatwaves on Intertidal Mudflat Colonized by an Exotic Mussel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marie%20Fouet">Marie Fouet</a>, <a href="https://publications.waset.org/abstracts/search?q=Olivier%20Maire"> Olivier Maire</a>, <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9cile%20Masse"> Cécile Masse</a>, <a href="https://publications.waset.org/abstracts/search?q=Hugues%20Blanchet"> Hugues Blanchet</a>, <a href="https://publications.waset.org/abstracts/search?q=Salom%C3%A9%20Coignard"> Salomé Coignard</a>, <a href="https://publications.waset.org/abstracts/search?q=Nicolas%20Lavesque"> Nicolas Lavesque</a>, <a href="https://publications.waset.org/abstracts/search?q=Guillaume%20Bernard"> Guillaume Bernard</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Exacerbated by global change, extreme climatic events such as atmospheric and marine heat waves may interact with the spread of non-indigenous species and their associated impacts on marine ecosystems. Since the 1970’s, the introduction of non-indigenous species due to oyster exchanges has been numerous. Among them, the Asian date mussel Arcuatula senhousia has colonized a large number of ecosystems worldwide (e.g., California, New Zealand, Italy). In these places, A.senhousia led to important habitat modifications in the benthic compartment through physical, biological, and biogeochemical effects associated with the development of dense mussel populations. In Arcachon Bay (France), a coastal lagoon of the French Atlantic and hotspot of oyster farming, abundances of A. senhousia recently increased, following a lag time of ca. 20 years since the first record of the species in 2002. Here, we addressed the potential effects of the interaction between A. senhousia invasion and heatwave intensity on ecosystem functioning within an intertidal mudflat. More precisely, two realistic intensities (“High” and “Severe”) of combined marine and atmospheric heatwaves have been simulated in an experimental tidal mesocosm system onto which naturally varying densities of A. senhousia and associated benthic communities were exposed in sediment cores collected in situ. Following a six-day exposure, community-scale responses were assessed by measuring benthic metabolism (oxygen and nutrient fluxes) in each core. Results show that besides significantly enhanced benthic metabolism with increasing heatwave intensity, mussel density clearly mediated the magnitude of the community-scale response, thereby highlighting the importance of understanding the interactive effects of environmental stressors co-occurring with non-indigenous species and their dependencies for a better assessment of their impacts. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=arcuatula%20senhousia" title="arcuatula senhousia">arcuatula senhousia</a>, <a href="https://publications.waset.org/abstracts/search?q=benthic%20habitat" title=" benthic habitat"> benthic habitat</a>, <a href="https://publications.waset.org/abstracts/search?q=ecosystem%20functioning" title=" ecosystem functioning"> ecosystem functioning</a>, <a href="https://publications.waset.org/abstracts/search?q=heatwaves" title=" heatwaves"> heatwaves</a>, <a href="https://publications.waset.org/abstracts/search?q=metabolism" title=" metabolism"> metabolism</a> </p> <a href="https://publications.waset.org/abstracts/179139/assessing-the-impact-of-heatwaves-on-intertidal-mudflat-colonized-by-an-exotic-mussel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/179139.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">68</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">65</span> Benthic Cover in Coral Reef Environments under Influence of Submarine Groundwater Discharges</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arlett%20A.%20Rosado-Torres">Arlett A. Rosado-Torres</a>, <a href="https://publications.waset.org/abstracts/search?q=Ismael%20Marino-Tapia"> Ismael Marino-Tapia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Changes in benthic cover of coral dominated systems to macroalgae dominance are widely studied worldwide. Watershed pollutants are potentially as important as overfishing causing phase shift. In certain regions of the world most of the continental inputs are through submarine groundwater discharges (SGD), which can play a significant ecological role because the concentration of its nutrients is usually greater that the one found in surface seawater. These stressors have adversely affected coral reefs, particularly in the Caribbean. Measurements of benthic cover (with video tracing, through a Go Pro camera), reef roughness (acoustic estimates with an Acoustic Doppler Current Velocity profiler and a differential GPS), thermohaline conditions (conductivity-temperature-depth (CTD) instrument) and nutrient measurements were taken in different sites in the reef lagoon of Puerto Morelos, Q. Roo, Mexico including those with influence of SGD and without it. The results suggest a link between SGD, macroalgae cover and structural complexity. Punctual water samples and data series from a CTD Diver confirm the presence of the SGD. On the site where the SGD is, the macroalgae cover is larger than in the other sites. To establish a causal link between this phase shift and SGD, the DELFT 3D hydrodynamic model (FLOW and WAVE modules) was performed under different environmental conditions and discharge magnitudes. The model was validated using measurements of oceanographic instruments anchored in the lagoon and forereef. The SGD is consistently favoring macroalgae populations and affecting structural complexity of the reef. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20model" title="hydrodynamic model">hydrodynamic model</a>, <a href="https://publications.waset.org/abstracts/search?q=macroalgae" title=" macroalgae"> macroalgae</a>, <a href="https://publications.waset.org/abstracts/search?q=nutrients" title=" nutrients"> nutrients</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20shift" title=" phase shift"> phase shift</a> </p> <a href="https://publications.waset.org/abstracts/97189/benthic-cover-in-coral-reef-environments-under-influence-of-submarine-groundwater-discharges" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97189.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">153</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">64</span> Contribution of Foraminifers in Biostratigraphy and Paleoecology Interpretations of the Basal Eocene From the Phosphatic Sra Ouertaine Basin, in the Southern Tethys(Tunisia)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Oum%20Elkhir%20Mahmoudi">Oum Elkhir Mahmoudi</a>, <a href="https://publications.waset.org/abstracts/search?q=Nebiha%20Ben%20Haj%20Ali"> Nebiha Ben Haj Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Micropaleontological, sedimentological and statistical studies were carried out on the late Paleoceneearly Eocene succession of Sra Ouertaine and Dyr El Kef in Northern open phosphatic Basin of Tunisia. Based on the abundance and stratigraphic distribution of planktic foraminiferal species, five planktic zones have been recognized from the base to the top of the phosphatic layers. The El Acarinina sibaiyaensis Zone, the E2 Pseudohastigerina wilcoxensis Zone, the E3 Morozovella marginodentata Zone, the E4 Morozovella formosa Zones and the E5 Morozovella subbotinae Zone. The placement of Paleocene-Eocene boundary (PETM) is just below the base of the phosphatic interval. The ETM-2 event may be detectable in the analyzed biotic record of Sra Ouertaine. Based on benthic assemblages, abundances, cluster and multivariate statistical analyses, two biofacies were recognized for each section. The recognized ecozones are typical of warm and shallow water inner neritic setting (dominance of epifaunal fauna Anomalinoides, Dentalina and Cibicidoides associated with Frondicularia phosphatica, Trochamminoides globigeriniformis and Eponides elevatus). The paleoenvironment is eutrophic (presence of several bolivinitids and verneuilinids). For the Dyr El Kef section and P5 and E2 of Sra Ouertaine section, our records indicate that paleoenvironment is influenced by coastal upwelling without oxygen-deficiency, the paleodepth is estimated to be around 50 m. The paleoecosystem is diversified and balanced with a general tendency to stressed condition. While the upper part of Sra Ouertaine section is more eutrophic, influenced by coastal upwelling with oxygen-deficiency, the paleodepth is estimated to be less than 50 m and the ecosystem is unsettled. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tunisia" title="Tunisia">Tunisia</a>, <a href="https://publications.waset.org/abstracts/search?q=early%20Eocene" title=" early Eocene"> early Eocene</a>, <a href="https://publications.waset.org/abstracts/search?q=foraminifera" title=" foraminifera"> foraminifera</a>, <a href="https://publications.waset.org/abstracts/search?q=chronostratigraphy" title=" chronostratigraphy"> chronostratigraphy</a> </p> <a href="https://publications.waset.org/abstracts/191696/contribution-of-foraminifers-in-biostratigraphy-and-paleoecology-interpretations-of-the-basal-eocene-from-the-phosphatic-sra-ouertaine-basin-in-the-southern-tethystunisia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/191696.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">27</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">63</span> Contribution of Foraminifers in Biostratigraphy and Paleoecology Interpretations of the Basal Eocene from the Phosphatic Sra Ouertaine Basin, in the Southern Tethys(Tunisia)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Oum%20Elkhir%20Mahmoudi">Oum Elkhir Mahmoudi</a>, <a href="https://publications.waset.org/abstracts/search?q=Nebiha%20Ben%20Haj%20Ali"> Nebiha Ben Haj Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Micropaleontological, sedimentological and statistical studies were carried out on the late Paleocene-early Eocene succession of Sra Ouertaine and Dyr El Kef in Northern open phosphatic Basin of Tunisia. Based on the abundance and stratigraphic distribution of planktic foraminiferal species, five planktic zones have been recognized from the base to the top of the phosphatic layers. The El Acarinina sibaiyaensis Zone, the E2 Pseudohastigerina wilcoxensis Zone, the E3 Morozovella marginodentata Zone, the E4 Morozovella formosa Zones and the E5 Morozovella subbotinae Zone. The placement of Paleocene-Eocene boundary (PETM) is just below the base of the phosphatic interval. The ETM-2 event may be detectable in the analyzed biotic record of Sra Ouertaine. Based on benthic assemblages, abundances, cluster and multivariate statistical analyses, two biofacies were recognized for each section. The recognized ecozones are typical of warm and shallow water inner neritic setting (dominance of epifaunal fauna Anomalinoides, Dentalina and Cibicidoides associated with Frondicularia phosphatica, Trochamminoides globigeriniformis and Eponides elevatus). The paleoenvironment is eutrophic (presence of several bolivinitids and verneuilinids). For the Dyr El Kef section and P5 and E2 of Sra Ouertaine section, our records indicate that paleoenvironment is influenced by coastal upwelling without oxygen-deficiency, the paleodepth is estimated to be around 50 m. The paleoecosystem is diversified and balanced with a general tendency to stressed condition. While the upper part of Sra Ouertaine section is more eutrophic, influenced by coastal upwelling with oxygen-deficiency, the paleodepth is estimated to be less than 50 m and the ecosystem is unsettled. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tunisia" title="Tunisia">Tunisia</a>, <a href="https://publications.waset.org/abstracts/search?q=Sra%20ouertaine%20Dyr%20el%20kef" title=" Sra ouertaine Dyr el kef"> Sra ouertaine Dyr el kef</a>, <a href="https://publications.waset.org/abstracts/search?q=early%20Eocene" title=" early Eocene"> early Eocene</a>, <a href="https://publications.waset.org/abstracts/search?q=foraminifera" title=" foraminifera"> foraminifera</a>, <a href="https://publications.waset.org/abstracts/search?q=chronostratigraphy" title=" chronostratigraphy"> chronostratigraphy</a>, <a href="https://publications.waset.org/abstracts/search?q=paleoecology" title=" paleoecology"> paleoecology</a>, <a href="https://publications.waset.org/abstracts/search?q=paleoenvironment" title=" paleoenvironment"> paleoenvironment</a> </p> <a href="https://publications.waset.org/abstracts/185923/contribution-of-foraminifers-in-biostratigraphy-and-paleoecology-interpretations-of-the-basal-eocene-from-the-phosphatic-sra-ouertaine-basin-in-the-southern-tethystunisia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/185923.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">47</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">62</span> Bioelectronic System for Continuous Monitoring of Cardiac Activity of Benthic Invertebrates for the Assessment of a Surface Water Quality</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sergey%20Kholodkevich">Sergey Kholodkevich</a>, <a href="https://publications.waset.org/abstracts/search?q=Tatiana%20Kuznetsova"> Tatiana Kuznetsova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective assessment of ecological state of water ecosystems is impossible without the use of biological methods of the environmental monitoring capable in the integrated look to reveal negative for biota changes of quality of water as habitats. Considerable interest for the development of such methods of environmental quality control represents biomarker approach. Measuring systems, by means of which register cardiac activity characteristics, received the name of bioelectronic. Bioelectronic systems are information and measuring systems in which animals (namely, benthic invertebrates) are directly included in structure of primary converters, being an integral part of electronic system of registration of these or those physiological or behavioural biomarkers. As physiological biomarkers various characteristics of cardiac activity of selected invertebrates have been used in bioelectronic system.lChanges in cardiac activity are considered as integrative measures of the physiological condition of organisms, which reflect the state of the environment of their dwelling. Greatest successes in the development of tools of biological methods and technologies of an assessment of surface water quality in real time. Essential advantage of bioindication of water quality by such tool is a possibility of an integrated assessment of biological effects of pollution on biota and also the expressness of such method and used approaches. In the report the practical experience of authors in biomonitoring and bioindication of an ecological condition of sea, brackish- and freshwater areas is discussed. Authors note that the method of non-invasive cardiac activity monitoring of selected invertebrates can be used not only for the advancement of biomonitoring, but also is useful in decision of general problems of comparative physiology of the invertebrates. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=benthic%20invertebrates" title="benthic invertebrates">benthic invertebrates</a>, <a href="https://publications.waset.org/abstracts/search?q=physiological%20state" title=" physiological state"> physiological state</a>, <a href="https://publications.waset.org/abstracts/search?q=heart%20rate%20monitoring" title=" heart rate monitoring"> heart rate monitoring</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20quality%20assessment" title=" water quality assessment"> water quality assessment</a> </p> <a href="https://publications.waset.org/abstracts/15523/bioelectronic-system-for-continuous-monitoring-of-cardiac-activity-of-benthic-invertebrates-for-the-assessment-of-a-surface-water-quality" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15523.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">717</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">61</span> Characteristics of Meiofaunal Communities in Intertidal Habitats Along Albanian Adriatic Sea Coast</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fundime%20Miri">Fundime Miri</a>, <a href="https://publications.waset.org/abstracts/search?q=Emanuela%20Sulaj"> Emanuela Sulaj</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Benthic ecosystems constitute important ecological habitats, providing fundamental services for spawning, foraging, and sheltering aquatic organisms. Benthic faunal communities are characterized by a large biological diversity, supported by a great physical variety of benthic habitats. Until late, the study of meiobenthic communities in Albania has been neglectedthus excluding an important component of benthos. The present study aims to bring characteristics of distribution pattern of meiofaunal communities with further focus on nematode genus-based diversity from different intertidal habitats along Albanian Adriatic Sea Coast. The investigation area is extended from Shkodra to Vlora District, including six sandy sampling sites in beaches and areas near river estuaries. Sediment samples were collected manually in low intertidal zone by using a cylindrical corer, with an internal diameter of 5 cm. The richness onmeiofaunalmajor taxon level did not show any significant change between different sampling sites compare to significant changes in nematode diversity at genus level, with distinct nematode assemblages per sampling sites and presence of exclusive genera. All meiofaunal communities under study were dominated by nematodes. Further assessment of functional diversity on nematode assemblages exhibited changes as well on trophic groups and life strategies due to diverse feeding behaviors and c-p values of nematode genera. This study emphasize the need for lower level taxonomic identification of meiofaunal organisms and extending of ecological assessments on trophic diversity and life strategies to understanding functional consequences. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=benthos" title="benthos">benthos</a>, <a href="https://publications.waset.org/abstracts/search?q=meiofauna" title=" meiofauna"> meiofauna</a>, <a href="https://publications.waset.org/abstracts/search?q=nematode%20genus-based%20diversity" title=" nematode genus-based diversity"> nematode genus-based diversity</a>, <a href="https://publications.waset.org/abstracts/search?q=functional%20diversity" title=" functional diversity"> functional diversity</a>, <a href="https://publications.waset.org/abstracts/search?q=intertidal" title=" intertidal"> intertidal</a>, <a href="https://publications.waset.org/abstracts/search?q=albanian%20adriatic%20coast" title=" albanian adriatic coast"> albanian adriatic coast</a> </p> <a href="https://publications.waset.org/abstracts/144773/characteristics-of-meiofaunal-communities-in-intertidal-habitats-along-albanian-adriatic-sea-coast" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/144773.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">149</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">60</span> Assessment of Marine Diversity on Rocky Shores of Triporti, Vlore, Albania</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ina%20Nasto">Ina Nasto</a>, <a href="https://publications.waset.org/abstracts/search?q=Denada%20Sota"> Denada Sota</a>, <a href="https://publications.waset.org/abstracts/search?q=Kerol%20Sacaj"> Kerol Sacaj</a>, <a href="https://publications.waset.org/abstracts/search?q=Brunilda%20Veshaj"> Brunilda Veshaj</a>, <a href="https://publications.waset.org/abstracts/search?q=Hajdar%20Kicaj"> Hajdar Kicaj</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Rocky shores are often used as models to describe the dynamics of biodiversity around the world, making them one of the most studied marine habitats and their communities. The variability in the number of species and the abundance of hard-bottom benthic animal communities on the coast of Triporti, north of the Bay of Vlora, Albania is described in relation to environmental variables using multivariate analysis. The purpose of this study is to monitor the species composition, quantitative characteristics, and seasonal variations of the benthic macroinvertebrate populations of the shallow rocky shores of the Triportit-Vlora area, as well as the assessment of the ecological condition of these populations. The rocky coast of Triport, with a length of 7 km, was divided into three sampling stations, with three transects each of 50m. The monitoring of benthic macroinvertebrates in these areas was carried out in two seasons, spring and summer (June and August 2021). In each station and sampling season, estimates of the total and average density for each species, the presence constant, and the assessment of biodiversity were calculated using the Shannon–Wiener and the Simpson index. The species composition, the quantitative characteristics of the populations, and the indicators mentioned above were analyzed in a comparative way, both between the seasons within one station and between the three stations with each other. Statistical processing of the data was carried out to analyze the changes between the seasons and between the sampling stations for the species composition, population density, as well as correlation between them. A total of 105 benthic macroinvertebrate taxa were found, dominated by Molluscs, Annelids, and Arthropods. The small density of species and the low degree of stability of the macrozoobenthic community are indicators of the poor ecological condition and environmental impact in the studied areas. Algal cover, the diversity of coastal microhabitats, and the degree of coastal exposure to waves play an important role in the characteristics of macrozoobenthos populations in the studied areas. Also, the rocky shores are of special interest because, in the infralittoral of these areas, there are dense kelp forests with Gongolaria barbata, Ericaria crinita as well as fragmented areas with Posidonia oceanica that reach the coast, priority habitats of special conservation importance in the Mediterranean. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Macrozoobenthic%20communities" title="Macrozoobenthic communities">Macrozoobenthic communities</a>, <a href="https://publications.waset.org/abstracts/search?q=Shannon%E2%80%93Wiener" title=" Shannon–Wiener"> Shannon–Wiener</a>, <a href="https://publications.waset.org/abstracts/search?q=Triporti" title=" Triporti"> Triporti</a>, <a href="https://publications.waset.org/abstracts/search?q=Vlore" title=" Vlore"> Vlore</a>, <a href="https://publications.waset.org/abstracts/search?q=rocky%20shore" title=" rocky shore"> rocky shore</a> </p> <a href="https://publications.waset.org/abstracts/158050/assessment-of-marine-diversity-on-rocky-shores-of-triporti-vlore-albania" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/158050.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">98</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">59</span> Assessment of Spatial and Temporal Variations of Some Biological Water Quality Parameters in Mat River, Albania</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Etleva%20Hamzaraj">Etleva Hamzaraj</a>, <a href="https://publications.waset.org/abstracts/search?q=Eva%20Kica"> Eva Kica</a>, <a href="https://publications.waset.org/abstracts/search?q=Anila%20Paparisto"> Anila Paparisto</a>, <a href="https://publications.waset.org/abstracts/search?q=Pranvera%20Lazo"> Pranvera Lazo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Worldwide demographic developments of recent decades have been associated with negative environmental consequences. For this reason, there is a growing interest in assessing the state of natural ecosystems or assessing human impact on them. In this respect, this study aims to evaluate the change in water quality of the Mat River for a period of about ten years to highlight human impact. In one year, period of study, several biological and environmental parameters are determined to evaluate river water quality, and the data collected are compared with those of a similar study in 2007. Samples are collected every month in five stations evenly distributed along the river. Total coliform bacteria, the number of heterotrophic bacteria in water, and benthic macroinvertebrates are used as biological parameters of water quality. The most probable number index is used for evaluation of total coliform bacteria in water, while the number of heterotrophic bacteria is determined by counting colonies on plates with Plate Count Agar, cultivated with 0.1 ml sample after series dilutions. Benthic macroinvertebrates are analyzed by the number of individuals per taxa, the value of biotic index, EPT Richness Index value and tolerance value. Environmental parameters like pH, temperature, and electrical conductivity are measured onsite. As expected, the bacterial load was higher near urban areas, and the pollution increased with the course of the river. The maximum concentration of fecal coliforms was 1100 MPN/100 ml in summer and near the most urbanized area of the river. The data collected during this study show that after about ten years, there is a change in water quality of Mat River. According to a similar study carried out in 2007, the water of Mat River was of ‘excellent’ quality. But, according to this study, the water was classified as of ‘excellent’ quality only in one sampling site, near river source, while in all other stations was of ‘good’ quality. This result is based on biological and environmental parameters measured. The human impact on the quality of water of Mat River is more than evident. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=water%20quality" title="water quality">water quality</a>, <a href="https://publications.waset.org/abstracts/search?q=coliform%20bacteria" title=" coliform bacteria"> coliform bacteria</a>, <a href="https://publications.waset.org/abstracts/search?q=MPN%20index" title=" MPN index"> MPN index</a>, <a href="https://publications.waset.org/abstracts/search?q=benthic%20macroinvertebrates" title=" benthic macroinvertebrates"> benthic macroinvertebrates</a>, <a href="https://publications.waset.org/abstracts/search?q=biotic%20index" title=" biotic index"> biotic index</a> </p> <a href="https://publications.waset.org/abstracts/122764/assessment-of-spatial-and-temporal-variations-of-some-biological-water-quality-parameters-in-mat-river-albania" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/122764.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">118</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">58</span> Ecosystem Response of a Semi-Enclosed Saline Bay to Damming and Sluice-Management: Case of Lake Grevelingen in the Netherlands</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marijn%20Tangelder">Marijn Tangelder</a>, <a href="https://publications.waset.org/abstracts/search?q=Ingeborg%20Mulder"> Ingeborg Mulder</a>, <a href="https://publications.waset.org/abstracts/search?q=Jeroen%20Wijsman"> Jeroen Wijsman</a>, <a href="https://publications.waset.org/abstracts/search?q=John%20Janssen"> John Janssen</a>, <a href="https://publications.waset.org/abstracts/search?q=Tom%20Ysebaert"> Tom Ysebaert</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The delta works in the Southwest Netherlands drastically changed the estuarine nature of this area. The Grevelingen estuary was dammed off and became a lake in 1971. Since 1978 a connection with the North Sea exists to keep the lake saline but management of the sluices varied over time. Our research of several decades of monitoring data shows that water management practices lead to drastic changes in water quality and consequent ecological shifts in benthic fauna, fish, and bird species. Benthic biomass, dominated by molluscs, showed major changes with an important role for invasive species. Fish migration and, therefore, fish stock in the lake changed with recently smaller fish species and lower biomass values, with consequences for fish eating birds. Implications are made towards future management to re-introduce micro-tide in connection with the North Sea to improve water quality and the ecological status of the lake, as well as consequences for the bordering Natura 2000 terrestrial habitats, including rare dune vegetations, are discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ecosystem%20study" title="ecosystem study">ecosystem study</a>, <a href="https://publications.waset.org/abstracts/search?q=Grevelingen" title=" Grevelingen"> Grevelingen</a>, <a href="https://publications.waset.org/abstracts/search?q=Natura%202000" title=" Natura 2000"> Natura 2000</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20management" title=" water management"> water management</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20quality" title=" water quality"> water quality</a> </p> <a href="https://publications.waset.org/abstracts/118654/ecosystem-response-of-a-semi-enclosed-saline-bay-to-damming-and-sluice-management-case-of-lake-grevelingen-in-the-netherlands" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/118654.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">128</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">57</span> Last ca 2500 Yr History of the Harmful Algal Blooms in South China Reconstructed on Organic-Walled Dinoflagellate Cysts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anastasia%20Poliakova">Anastasia Poliakova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Harmful algal bloom (HAB) is a known negative phenomenon that is caused both by natural factors and anthropogenic influence. HABs can result in a series of deleterious effects, such as beach fouling, paralytic shellﬁsh poisoning, mass mortality of marine species, and a threat to human health, especially if toxins pollute drinking water or occur nearby public resorts. In South China, the problem of HABs has an ultimately important meaning. For this study, we used a 1.5 m sediment core LAX-2018-2 collected in 2018 from the Zhanjiang Mangrove National Nature Reserve (109°03´E, 20°30´N), Guangdong Province, South China. High-resolution coastal environment reconstruction with a specific focus on the HABs history during the last ca 2500 yrs was attempted. Age control was performed with five radiocarbon dates obtained from benthic foraminifera. A total number of 71 dinoflagellate cyst types was recorded. The most common types found consistently throughout the sediment sequence were autotrophic Spiniferites spp., Spiniferites hyperacanthus and S. mirabilis, S. ramosus, Operculodinium centrocarpum sensu Wall and Dale 1966, Polysphaeridium zoharyi, and heterotrophic Brigantedinium ssp., cyst of Gymnodinium catenatum and cysts mixture of Protoperidinium. Three local dinoflagellate zones LAX-1 to LAX-3 were established based on the results of the constrained cluster analysis and data ordination; additionally, the middle zone LAX-2 was derived into two subzones, LAX-2a and LAX-2b based on the dynamics of toxic and heterotrophic cysts as well as on the significant changes (probability, P=0.89) in percentages of eutrophic indicators. The total cyst count varied from 106 to 410 dinocysts per slide, with 177 cyst types on average. Dinocyst assemblages are characterized by high values of the dost-depositional degradation index (kt) that varies between 3.6 and 7.6 (averaging 5.4), which is relatively high and is very typical for the areas with selective dinoflagellate cyst preservation that is related to bottom-water oxygen concentrations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=reconstruction%20of%20palaeoenvironment" title="reconstruction of palaeoenvironment">reconstruction of palaeoenvironment</a>, <a href="https://publications.waset.org/abstracts/search?q=harmful%20algal%20blooms" title=" harmful algal blooms"> harmful algal blooms</a>, <a href="https://publications.waset.org/abstracts/search?q=anthropogenic%20influence%20on%20coastal%20zones" title=" anthropogenic influence on coastal zones"> anthropogenic influence on coastal zones</a>, <a href="https://publications.waset.org/abstracts/search?q=South%20China%20Sea" title=" South China Sea"> South China Sea</a> </p> <a href="https://publications.waset.org/abstracts/158027/last-ca-2500-yr-history-of-the-harmful-algal-blooms-in-south-china-reconstructed-on-organic-walled-dinoflagellate-cysts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/158027.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">88</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">56</span> Functional Feeding Groups and Trophic Levels of Benthic Macroinvertebrates Assemblages in Albertine Rift Rivers and Streams in South Western Uganda</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Peace%20Liz%20Sasha%20Musonge">Peace Liz Sasha Musonge</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Behavioral aspects of species nutrition such as feeding methods and food type are archetypal biological traits signifying how species have adapted to their environment. This concept of functional feeding groups (FFG) analysis is currently used to ascertain the trophic levels of the aquatic food web in a specific microhabitat. However, in Eastern Africa, information about the FFG classification of benthic macroinvertebrates in highland rivers and streams is almost absent, and existing studies have fragmented datasets. For this reason, we carried out a robust study to determine the feed type, trophic level and FFGs, of 56 macroinvertebrate taxa (identified to family level) from Albertine rift valley streams. Our findings showed that all five major functional feeding groups were represented; Gatherer Collectors (GC); Predators (PR); shredders (SH); Scrapers (SC); and Filterer collectors. The most dominant functional feeding group was the Gatherer Collectors (GC) that accounted for 53.5% of the total population. The most abundant (GC) families were Baetidae (7813 individuals), Chironomidae NTP (5628) and Caenidae (1848). Majority of the macroinvertebrate population feed on Fine particulate organic matter (FPOM) from the stream bottom. In terms of taxa richness the Predators (PR) had the highest value of 24 taxa and the Filterer Collectors group had the least number of taxa (3). The families that had the highest number of predators (PR) were Corixidae (1024 individuals), Coenagrionidae (445) and Libellulidae (283). However, Predators accounted for only 7.4% of the population. The findings highlighted the functional feeding groups and habitat type of macroinvertebrate communities along an altitudinal gradient. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=trophic%20levels" title="trophic levels">trophic levels</a>, <a href="https://publications.waset.org/abstracts/search?q=functional%20feeding%20groups" title=" functional feeding groups"> functional feeding groups</a>, <a href="https://publications.waset.org/abstracts/search?q=macroinvertebrates" title=" macroinvertebrates"> macroinvertebrates</a>, <a href="https://publications.waset.org/abstracts/search?q=Albertine%20rift" title=" Albertine rift"> Albertine rift</a> </p> <a href="https://publications.waset.org/abstracts/63656/functional-feeding-groups-and-trophic-levels-of-benthic-macroinvertebrates-assemblages-in-albertine-rift-rivers-and-streams-in-south-western-uganda" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63656.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">235</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">55</span> Trophic Variations in Uptake and Assimilation of Cadmium, Manganese and Zinc: An Estuarine Food-Chain Radiotracer Experiment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20O%E2%80%99Mara">K. O’Mara</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Cresswell"> T. Cresswell</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nearly half of the world’s population live near the coast, and as a result, estuaries and coastal bays in populated or industrialized areas often receive metal pollution. Heavy metals have a chemical affinity for sediment particles and can be stored in estuarine sediments and become biologically available under changing conditions. Organisms inhabiting estuaries can be exposed to metals from a variety of sources including metals dissolved in water, bound to sediment or within contaminated prey. Metal uptake and assimilation responses can vary even between species that are biologically similar, making pollution effects difficult to predict. A multi-trophic level experiment representing a common Eastern Australian estuarine food chain was used to study the sources for Cd, Mn and Zn uptake and assimilation in organisms occupying several trophic levels. Sand cockles (Katelysia scalarina), school prawns (Metapenaeus macleayi) and sand whiting (Sillago ciliata) were exposed to radiolabelled seawater, suspended sediment and food. Three pulse-chase trials on filter-feeding sand cockles were performed using radiolabelled phytoplankton (Tetraselmis sp.), benthic microalgae (Entomoneis sp.) and suspended sediment. Benthic microalgae had lower metal uptake than phytoplankton during labelling but higher cockle assimilation efficiencies (Cd = 51%, Mn = 42%, Zn = 63 %) than both phytoplankton (Cd = 21%, Mn = 32%, Zn = 33%) and suspended sediment (except Mn; (Cd = 38%, Mn = 42%, Zn = 53%)). Sand cockles were also sensitive to uptake of Cd, Mn and Zn dissolved in seawater. Uptake of these metals from the dissolved phase was negligible in prawns and fish, with prawns only accumulating metals during moulting, which were then lost with subsequent moulting in the depuration phase. Diet appears to be the main source of metal assimilation in school prawns, with 65%, 54% and 58% assimilation efficiencies from Cd, Mn and Zn respectively. Whiting fed contaminated prawns were able to exclude the majority of the metal activity through egestion, with only 10%, 23% and 11% assimilation efficiencies from Cd, Mn and Zn respectively. The findings of this study support previous studies that find diet to be the dominant accumulation source for higher level trophic organisms. These results show that assimilation efficiencies can vary depending on the source of exposure; sand cockles assimilated more Cd, Mn, and Zn from the benthic diatom than phytoplankton and assimilation was higher in sand whiting fed prawns compared to artificial pellets. The sensitivity of sand cockles to metal uptake and assimilation from a variety of sources poses concerns for metal availability to predators ingesting the clam tissue, including humans. The high tolerance of sand whiting to these metals is reflected in their widespread presence in Eastern Australian estuaries, including contaminated estuaries such as Botany Bay and Port Jackson. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cadmium" title="cadmium">cadmium</a>, <a href="https://publications.waset.org/abstracts/search?q=food%20chain" title=" food chain"> food chain</a>, <a href="https://publications.waset.org/abstracts/search?q=metal" title=" metal"> metal</a>, <a href="https://publications.waset.org/abstracts/search?q=manganese" title=" manganese"> manganese</a>, <a href="https://publications.waset.org/abstracts/search?q=trophic" title=" trophic"> trophic</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc" title=" zinc"> zinc</a> </p> <a href="https://publications.waset.org/abstracts/77612/trophic-variations-in-uptake-and-assimilation-of-cadmium-manganese-and-zinc-an-estuarine-food-chain-radiotracer-experiment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/77612.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">202</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">54</span> Effects of Small Impoundments on Leaf Litter Decomposition and Methane Derived Carbon in the Benthic Foodweb in Streams</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=John%20Gichimu%20Mbaka">John Gichimu Mbaka</a>, <a href="https://publications.waset.org/abstracts/search?q=Jan%20Helmrich%20Martin%20von%20Baumbach"> Jan Helmrich Martin von Baumbach</a>, <a href="https://publications.waset.org/abstracts/search?q=Celia%20Somlai"> Celia Somlai</a>, <a href="https://publications.waset.org/abstracts/search?q=Denis%20K%C3%B6pfer"> Denis Köpfer</a>, <a href="https://publications.waset.org/abstracts/search?q=Andreas%20Maeck"> Andreas Maeck</a>, <a href="https://publications.waset.org/abstracts/search?q=Andreas%20Lorke"> Andreas Lorke</a>, <a href="https://publications.waset.org/abstracts/search?q=Ralf%20Sch%C3%A4fer"> Ralf Schäfer</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Leaf litter decomposition is an important process providing energy to biotic communities. Additionally, methane gas (CH4) has been identified as an important alternative source of carbon and energy in some freshwater food webs.Flow regulation and dams can strongly alter freshwater ecosystems, but little is known about the effect of small impoundments on leaf litter decomposition and methane derived carbon in streams. In this study, we tested the effect of small water storage impoundments on leaf litter decomposition rates and methane derived carbon. Leaf litter decomposition rates were assessed by comparing treatment sites located close to nine impoundments (Rheinland Pfalz state, Germany) and reference sites located far away from the impoundments.CH4 concentrations were measured in eleven impoundments and correlated with the δ13C values of two subfamilies of chironomid larvae (i.e. Chironomini and Tanypodinae). Leaf litter break down rates were significantly lower in study sites located immediately above the impoundments, especially associated with a reduction in the abundance of shredders. Chironomini larvae had the lower mean δ13C values (‒29.2 to ‒25.5 ‰), than Tanypodinae larvae (‒26.9 to ‒25.3 ‰).No significant relationships were established between CH4 concentrations and δ13C values of chironomids (p> 0.05).Mean δ13C values of chironomid larvae (mean: ‒26.8‰, range: ‒ 29.2‰ to ‒ 25.3‰) were similar to those of sedimentary organic matter (SOM) (mean: ‒28.4‰, range: ‒ 29.3‰ to ‒ 27.1‰) and tree leaf litter (mean: ‒29.8 ‰, range: ‒ 30.5‰ to ‒ 29.1‰). In conclusion, this study demonstrates that small impoundments may have a negative effect on leaf litter decomposition in forest streams and that CH4 has limited influence on the benthic food web in stream impoundments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=river%20functioning" title="river functioning">river functioning</a>, <a href="https://publications.waset.org/abstracts/search?q=chironomids" title=" chironomids"> chironomids</a>, <a href="https://publications.waset.org/abstracts/search?q=Alder%20tree" title=" Alder tree"> Alder tree</a>, <a href="https://publications.waset.org/abstracts/search?q=stable%20isotopes" title=" stable isotopes"> stable isotopes</a>, <a href="https://publications.waset.org/abstracts/search?q=methane%20oxidation" title=" methane oxidation"> methane oxidation</a>, <a href="https://publications.waset.org/abstracts/search?q=shredder" title=" shredder"> shredder</a> </p> <a href="https://publications.waset.org/abstracts/18714/effects-of-small-impoundments-on-leaf-litter-decomposition-and-methane-derived-carbon-in-the-benthic-foodweb-in-streams" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18714.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">734</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">53</span> Distribution Patterns of the Renieramycin-M-Producing Blue Sponge, Xestospongia sp. (De Laubenfels, 1932) (Phylum: Porifera, Class: Demospongiae) in Puerto Galera, Oriental Mindoro, Philippines</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Geminne%20Manzano">Geminne Manzano</a>, <a href="https://publications.waset.org/abstracts/search?q=Clairecynth%20Yu"> Clairecynth Yu</a>, <a href="https://publications.waset.org/abstracts/search?q=Lilibeth%20Salvador-Reyes"> Lilibeth Salvador-Reyes</a>, <a href="https://publications.waset.org/abstracts/search?q=Viviene%20Santiago"> Viviene Santiago</a>, <a href="https://publications.waset.org/abstracts/search?q=Porfirio%20Ali%C3%B1O"> Porfirio AliñO</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The distribution and abundance patterns of many marine sessile organisms such as sponges vary among and within reefs. Determining the factors affecting its distribution is essential especially for organisms that produce secondary metabolites with pharmaceutical importance. In this study, the small-scale distribution patterns of the Philippine blue sponge, Xestospongia sp. in relation to some ecological factors were examined. The relationship between the renieramycin-M production and their benthic attributes were also determined. Ecological surveys were conducted on two stations with varying depth and exposure located in Oriental Mindoro, Philippines. Three 30 by 6m belt transect were used to assess the sponge abundance at each station. The substratum of the sponges was also characterized. Fish visual census observations were also taken together with the photo transect methods benthic surveys. Sponge samples were also collected for the extraction of Renieramycin-M and for further chemical analysis. Varying distribution patterns were observed to be attributed to the combination of different ecological and environmental factors. The amount of Renieramycin-production also varied in each station. The common substratum for blue sponges includes hard and soft corals, as well as, dead coral with algal patches. Blue sponges from exposed habitat frequently grow associated with massive and branching corals, Porites sp., while the most frequent substrate found on sheltered habitats is the coral Pavona sp. Exploring the influence of ecological and environmental parameters on the abundance and distribution of sponge assemblages provide ecological insights and their potential applications to pharmaceutical studies. The results of this study provide further impetus in pursuing studies into patterns and processes of the Philippine blue sponge, Xestospongia sp. distribution in relation to the chemical ecology of its secondary metabolites. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=distribution%20patterns" title="distribution patterns">distribution patterns</a>, <a href="https://publications.waset.org/abstracts/search?q=Porifera" title=" Porifera"> Porifera</a>, <a href="https://publications.waset.org/abstracts/search?q=Renieramycin-M" title=" Renieramycin-M"> Renieramycin-M</a>, <a href="https://publications.waset.org/abstracts/search?q=sponge%20assemblages" title=" sponge assemblages"> sponge assemblages</a>, <a href="https://publications.waset.org/abstracts/search?q=Xestospongia%20sp." title=" Xestospongia sp."> Xestospongia sp.</a> </p> <a href="https://publications.waset.org/abstracts/53572/distribution-patterns-of-the-renieramycin-m-producing-blue-sponge-xestospongia-sp-de-laubenfels-1932-phylum-porifera-class-demospongiae-in-puerto-galera-oriental-mindoro-philippines" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53572.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">266</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">52</span> Biostratigraphy of Neogene and Quaternary Deposits of the West Turkmen Depression</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arzu%20Javadova">Arzu Javadova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The complex of sedimentary deposits that make up the West Turkmen Basin is almost completely hidden under the Quaternary formations. The most ancient deposits emerging on the surface in some places are the deposits of the Red Color Suite of the Pliocene. Miocene deposits are exposed only at the Western end of the Kopet Dag. The main object of stratigraphic, including micropaleontological studies, were the deposits of the Quaternary and Pliocene forming marine and coastal structures. The identified stratigraphic units have certain characteristic Ostracod complexes. The fauna of the Ostracod acquires special significance in the stratification of Neogene and Quaternary deposits. Ostracods of the Neogene, Pliocene and Quaternary deposits of the West Turkmen depression are represented by a large part of the species common in the corresponding deposits of Azerbaijan and Iran. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=neogene" title="neogene">neogene</a>, <a href="https://publications.waset.org/abstracts/search?q=quaternary" title=" quaternary"> quaternary</a>, <a href="https://publications.waset.org/abstracts/search?q=turkmenistan" title=" turkmenistan"> turkmenistan</a>, <a href="https://publications.waset.org/abstracts/search?q=south%20caspian%20basin" title=" south caspian basin"> south caspian basin</a>, <a href="https://publications.waset.org/abstracts/search?q=ostracoda" title=" ostracoda"> ostracoda</a>, <a href="https://publications.waset.org/abstracts/search?q=foraminifera" title=" foraminifera"> foraminifera</a>, <a href="https://publications.waset.org/abstracts/search?q=biostratigraphy" title=" biostratigraphy"> biostratigraphy</a>, <a href="https://publications.waset.org/abstracts/search?q=paleontology" title=" paleontology"> paleontology</a> </p> <a href="https://publications.waset.org/abstracts/171898/biostratigraphy-of-neogene-and-quaternary-deposits-of-the-west-turkmen-depression" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/171898.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">62</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">51</span> Effects of Oil Pollution on Euryglossa orientalis and Psettodes erumei in the Persian Gulf</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Majid%20Afkhami">Majid Afkhami</a>, <a href="https://publications.waset.org/abstracts/search?q=Maryam%20Ehsanpour"> Maryam Ehsanpour</a>, <a href="https://publications.waset.org/abstracts/search?q=Reza%20Khoshnood"> Reza Khoshnood</a>, <a href="https://publications.waset.org/abstracts/search?q=Zahra%20Khoshnood"> Zahra Khoshnood</a>, <a href="https://publications.waset.org/abstracts/search?q=Rastin%20Afkhami"> Rastin Afkhami</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Marine pollution is a global environmental problem. Different human activities on land, in the water and in the air contribute to the contamination of seawater, sediments and organisms with potentially toxic substances. Contaminants can be natural substances or artificially produced compounds. After discharge into the sea, contaminants can stay in the water in dissolved form or they can be removed from the water column through sedimentation to the bottom sediments. Histopathological alterations can be used as indicators for the effects of various anthropogenic pollutants on organisms and are a reflection of the overall health of the entire population in the ecosystem. These histo pathological biomarkers are closely related to other biomarkers of stress since many pollutants have to undergo metabolic activation in order to be able to provoke cellular change in the affected organism. In order to make evaluation of the effects of oil pollution, some heavy metals bioaccumulation and explore their histopathological effects on hepatocytes of Oriental sole (Euryglossa orientalis) and Deep flounder (Psettodes erumei), fishes caught from two areas of north coast of the Persian Gulf: Bandar Abbass and Bandar Lengeh. Concentrations of Ni and V in liver of both species in two sampling regions were in following order: Bandar abbass Bandar lengeh; also between two species, these quantities were higher in P. erumei than E. orientalis in both sampling regions. Histopathology of the liver shows some cellular alterations including: degeneration, necrosis and tissue disruption, and histopathological effects were severe in P. erumei than E. orientalis. Results showed that Bandar Abbass region was more polluted than Bandar Lengeh, and because Ni and V were oil pollution indicators, and two flat fishes were benthic, they can receive considerable amount of oil pollution through their biological activities like feeding. Also higher amounts of heavy metal concentrations and major histopathological effects in E. orientalis showed strong relationship between benthic habitat of the fish and amounts of received pollutants from water and sediments, because E. orientalis is more related to the bottom than P. erumei. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heavy%20metals" title="heavy metals">heavy metals</a>, <a href="https://publications.waset.org/abstracts/search?q=flatfishes" title=" flatfishes"> flatfishes</a>, <a href="https://publications.waset.org/abstracts/search?q=Persian%20Gulf" title=" Persian Gulf"> Persian Gulf</a>, <a href="https://publications.waset.org/abstracts/search?q=oil%20pollution" title=" oil pollution"> oil pollution</a> </p> <a href="https://publications.waset.org/abstracts/33819/effects-of-oil-pollution-on-euryglossa-orientalis-and-psettodes-erumei-in-the-persian-gulf" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33819.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">343</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">50</span> Facies, Diagenetic Analysis and Sequence Stratigraphy of Habib Rahi Formation Dwelling in the Vicinity of Jacobabad Khairpur High, Southern Indus Basin, Pakistan</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Haris">Muhammad Haris</a>, <a href="https://publications.waset.org/abstracts/search?q=Syed%20Kamran%20Ali"> Syed Kamran Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=Mubeen%20Islam"> Mubeen Islam</a>, <a href="https://publications.waset.org/abstracts/search?q=Tariq%20Mehmood"> Tariq Mehmood</a>, <a href="https://publications.waset.org/abstracts/search?q=Faisal%20Shah"> Faisal Shah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Jacobabad Khairpur High, part of a Sukkur rift zone, is the separating boundary between Central and Southern Indus Basin, formed as a result of Post-Jurassic uplift after the deposition of Middle Jurassic Chiltan Formation. Habib Rahi Formation of Middle to Late Eocene outcrops in the vicinity of Jacobabad Khairpur High, a section at Rohri near Sukkur is measured in detail for lithofacies, microfacies, diagenetic analysis and sequence stratigraphy. Habib Rahi Formation is richly fossiliferous and consists of mostly limestone with subordinate clays and marl. The total thickness of the formation in this section is 28.8m. The bottom of the formation is not exposed, while the upper contact with the Sirki Shale of the Middle Eocene age is unconformable in some places. A section is measured using Jacob’s Staff method, and traverses were made perpendicular to the strike. Four different lithofacies were identified based on outcrop geology which includes coarse-grained limestone facies (HR-1 to HR-5), massive bedded limestone facies (HR-6 HR-7), and micritic limestone facies (HR-8 to HR-13) and algal dolomitic limestone facie (HR-14). Total 14 rock samples were collected from outcrop for detailed petrographic studies, and thin sections of respective samples were prepared and analyzed under the microscope. On the basis of Dunham’s (1962) classification systems after studying textures, grain size, and fossil content and using Folk’s (1959) classification system after reviewing Allochems type, four microfacies were identified. These microfacies include HR-MF 1: Benthonic Foraminiferal Wackstone/Biomicrite Microfacies, HR-MF 2: Foramineral Nummulites Wackstone-Packstone/Biomicrite Microfacies HR-MF 3: Benthonic Foraminiferal Packstone/Biomicrite Microfacies, HR-MF 4: Bioclasts Carbonate Mudstone/Micrite Microfacies. The abundance of larger benthic Foraminifera’s (LBF), including Assilina sp., A. spiral abrade, A. granulosa, A. dandotica, A. laminosa, Nummulite sp., N. fabiani, N. stratus, N. globulus, Textularia, Bioclasts, and Red algae indicates shallow marine (Tidal Flat) environment of deposition. Based on variations in rock types, grain size, and marina fauna Habib Rahi Formation shows progradational stacking patterns, which indicates coarsening upward cycles. The second order of sea-level rise is identified (spanning from Y-Persian to Bartonian age) that represents the Transgressive System Tract (TST) and a third-order Regressive System Tract (RST) (spanning from Bartonian to Priabonian age). Diagenetic processes include fossils replacement by mud, dolomitization, pressure dissolution associated stylolites features and filling with dark organic matter. The presence of the microfossils includes Nummulite. striatus, N. fabiani, and Assilina. dandotica, signify Bartonian to Priabonian age of Habib Rahi Formation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jacobabad%20Khairpur%20High" title="Jacobabad Khairpur High">Jacobabad Khairpur High</a>, <a href="https://publications.waset.org/abstracts/search?q=Habib%20Rahi%20Formation" title=" Habib Rahi Formation"> Habib Rahi Formation</a>, <a href="https://publications.waset.org/abstracts/search?q=lithofacies" title=" lithofacies"> lithofacies</a>, <a href="https://publications.waset.org/abstracts/search?q=microfacies" title=" microfacies"> microfacies</a>, <a href="https://publications.waset.org/abstracts/search?q=sequence%20stratigraphy" title=" sequence stratigraphy"> sequence stratigraphy</a>, <a href="https://publications.waset.org/abstracts/search?q=diagenetic%20history" title=" diagenetic history"> diagenetic history</a> </p> <a href="https://publications.waset.org/abstracts/152352/facies-diagenetic-analysis-and-sequence-stratigraphy-of-habib-rahi-formation-dwelling-in-the-vicinity-of-jacobabad-khairpur-high-southern-indus-basin-pakistan" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/152352.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">473</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">49</span> Diversity, Biochemical and Genomic Assessment of Selected Benthic Species of Two Tropical Lagoons, Southwest Nigeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20F.%20Okunade">G. F. Okunade</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20O.%20Lawal"> M. O. Lawal</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20E.%20Uwadiae"> R. E. Uwadiae</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Portnoy"> D. Portnoy </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The diversity, physico-chemical, biochemical and genomics assessment of Macrofauna species of Ologe and Badagry Lagoons were carried out between August 2016 and July 2018. The concentrations of Fe, Zn, Mn, Cd, Cr, and Pb in water were determined by Atomic Absorption Spectrophotometer (AAS). Particle size distribution was determined with wet-sieving and sedimentation using hydrometer method. Genomics analyses were carried using 25 P. fusca (quadriseriata) and 25 P.fusca from each lagoon due to abundance in both lagoons all through the two years of collection. DNA was isolated from each sample using the Mag-Bind Blood and Tissue DNA HD 96 kit; a method designed to isolate high quality. The biochemical characteristics were analysed in the dominanat species (P.aurita and T. fuscatus) using ELISA kits. Physico-chemical parameters such as pH, total dissolved solids, dissolved oxygen, conductivity and TDS were analysed using APHA standard protocols. The Physico-chemical parameters of the water quality recorded with mean values of 32.46 ± 0.66mg/L and 41.93 ± 0.65 for COD, 27.28 ± 0.97 and 34.82 ± 0.1 mg/L for BOD, 0.04 ± 4.71 mg/L for DO, 6.65 and 6.58 for pH in Ologe and Badagry lagoons with significant variations (p ≤ 0.05) across seasons. The mean and standard deviation of salinity for Ologe and Badagry Lagoons ranged from 0.43 ± 0.30 to 0.27 ± 0.09. A total of 4210 species belonging to a phylum, two classes, four families and a total of 2008 species in Ologe lagoon while a phylum, two classes, 5 families and a total of 2202 species in Badagry lagoon. The percentage composition of the classes at Ologe lagoon had 99% gastropod and 1% bivalve, while Gastropod contributed 98.91% and bivalve 1.09% in Badagry lagoon. Particle size was distributed in 0.002mm to 2.00mm, particle size distribution in Ologe lagoon recorded 0.83% gravels, 97.83% sand, and 1.33% silt particles while Badagry lagoon recorded 7.43% sand, 24.71% silt, and 67.86% clay particles hence, the excessive dredging activities going on in the lagoon. Maximum percentage of sand (100%) was seen in station 6 in Ologe lagoon while the minimum (96%) was found in station 1. P. aurita (Ologe Lagoon) and T. fuscastus (Badagry Lagoon) were the most abundant benthic species in which both contributed 61.05% and 64.35%, respectively. The enzymatic activities of P. aurita observed with mean values of 21.03 mg/dl for AST, 10.33 mg/dl for ALP, 82.16 mg/dl for ALT and 73.06 mg/dl for CHO in Ologe Lagoon While T. fuscatus observed mean values of Badagry Lagoon) recorded mean values 29.76 mg/dl, ALP with 11.69mg/L, ALT with 140.58 mg/dl and CHO with 45.98 mg/dl. There were significant variations (P < 0.05) in AST and CHO levels of activities in the muscles of the species. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=benthos" title="benthos">benthos</a>, <a href="https://publications.waset.org/abstracts/search?q=biochemical%20responses" title=" biochemical responses"> biochemical responses</a>, <a href="https://publications.waset.org/abstracts/search?q=genomics" title=" genomics"> genomics</a>, <a href="https://publications.waset.org/abstracts/search?q=metals" title=" metals"> metals</a>, <a href="https://publications.waset.org/abstracts/search?q=particle%20size" title=" particle size "> particle size </a> </p> <a href="https://publications.waset.org/abstracts/112014/diversity-biochemical-and-genomic-assessment-of-selected-benthic-species-of-two-tropical-lagoons-southwest-nigeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/112014.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">126</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=benthic%20foraminifera&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=benthic%20foraminifera&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=benthic%20foraminifera&page=2" rel="next">&rsaquo;</a></li> </ul> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" 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