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ecosystem</title> <meta name="description" content="Search results for: marine ecosystem"> <meta name="keywords" content="marine ecosystem"> <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 d-lg-none 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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="marine ecosystem"> <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> 1705</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: marine ecosystem</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1615</span> Physicochemical Characterizations of Marine and River Sediments in the North of France</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abriak%20Nor%20Edine">Abriak Nor Edine</a>, <a href="https://publications.waset.org/abstracts/search?q=Zentar%20Rachid"> Zentar Rachid</a>, <a href="https://publications.waset.org/abstracts/search?q=Achour%20Raouf"> Achour Raouf</a>, <a href="https://publications.waset.org/abstracts/search?q=Tran%20Ngoc%20Thanh"> Tran Ngoc Thanh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work is undertaken to develop a methodology to enhance the management of dredged marine and river sediments in the North of France. The main objective of this study is to determine the main characteristics of these sediments. In this order, physical, mineralogical and chemical properties of both types of sediments are measured. Moreover, their potential impacts on the environment are assessed throughout leaching tests. From the obtained results, the potential of their use in road engineering is discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=marine%20sediments" title="marine sediments">marine sediments</a>, <a href="https://publications.waset.org/abstracts/search?q=river%20sediments" title=" river sediments"> river sediments</a>, <a href="https://publications.waset.org/abstracts/search?q=physico%20chemical%20characterizations" title=" physico chemical characterizations"> physico chemical characterizations</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20characterizations" title=" environmental characterizations"> environmental characterizations</a> </p> <a href="https://publications.waset.org/abstracts/18912/physicochemical-characterizations-of-marine-and-river-sediments-in-the-north-of-france" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18912.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">548</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">1614</span> Promoting Social Advocacy through Digital Storytelling: The Case of Ocean Acidification</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chun%20Chen%20Yea">Chun Chen Yea</a>, <a href="https://publications.waset.org/abstracts/search?q=Wen%20Huei%20Chou"> Wen Huei Chou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many chemical changes in the atmosphere and the ocean are invisible to the naked eye, but they have profound impacts. These changes not only confirm the phenomenon of global carbon pollution, but also forewarn that more changes are coming. The carbon dioxide gases emitted from the burning of fossil fuels dissolve into the ocean and chemically react with seawater to form carbonic acid, which increases the acidity of the originally alkaline seawater. This gradual acidification is occurring at an unprecedented rate and will affect the effective formation of carapace of some marine organisms such as corals and crustaceans, which are almost entirely composed of calcium carbonate. The carapace of these organisms will become more dissoluble. Acidified seawater not only threatens the survival of marine life, but also negatively impacts the global ecosystem via the food chain. Faced with the threat of ocean acidification, all humans are duty-bound. The industrial sector outputs the highest level of carbon dioxide emissions in Taiwan, and the petrochemical industry is the major contributor. Ever since the construction of Formosa Plastics Group's No. 6 Naphtha Cracker Plant in Yunlin County, there have been many environmental concerns such as air pollution and carbon dioxide emission. The marine life along the coast of Yunlin is directly affected by ocean acidification arising from the carbon emissions. Societal change demands our willingness to act, which is what social advocacy promotes. This study uses digital storytelling for social advocacy and ocean acidification as the subject of a visual narrative in visualization to demonstrate the subsequent promotion of social advocacy. Storytelling can transform dull knowledge into an engaging narrative of the crisis faced by marine life. Digital dissemination is an effective social-work practice. The visualization promoting awareness on ocean acidification disseminated via social media platforms, such as Facebook and Instagram. Social media enables users to compose their own messages and share information across different platforms, which helps disseminate the core message of social advocacy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=digital%20storytelling" title="digital storytelling">digital storytelling</a>, <a href="https://publications.waset.org/abstracts/search?q=visualization" title=" visualization"> visualization</a>, <a href="https://publications.waset.org/abstracts/search?q=ocean%20acidification" title=" ocean acidification"> ocean acidification</a>, <a href="https://publications.waset.org/abstracts/search?q=social%20advocacy" title=" social advocacy"> social advocacy</a> </p> <a href="https://publications.waset.org/abstracts/101471/promoting-social-advocacy-through-digital-storytelling-the-case-of-ocean-acidification" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/101471.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">117</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">1613</span> Assessment of Community Perceptions of Mangrove Ecosystem Services and Their Link to SDGs in Vanga, Kenya </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Samson%20Obiene">Samson Obiene</a>, <a href="https://publications.waset.org/abstracts/search?q=Khamati%20Shilabukha"> Khamati Shilabukha</a>, <a href="https://publications.waset.org/abstracts/search?q=Geoffrey%20Muga"> Geoffrey Muga</a>, <a href="https://publications.waset.org/abstracts/search?q=James%20Kairo"> James Kairo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mangroves play a vital role in the achievement of multiple goals of global sustainable development (SDG’s), particularly SDG SDG 14 (life under water). Their management, however, is faced with several shortcomings arising from inadequate knowledge on the perceptions of their ecosystem services, hence a need to map mangrove goods and services within SDGs while interrogating the disaggregated perceptions. This study therefore aimed at exploring the parities and disparities in attitudes and perceptions of mangrove ecosystem services among community members of Vanga and the link of the ecosystem services (ESs) to specific SDG targets. The study was based at the Kenya-Tanzania transboundary area in Vanga; where a carbon-offset project on mangroves is being up scaled. Mixed methods approach employing surveys, focus group discussions (FGDs) and reviews of secondary data were used in the study. A two stage cluster samplings was used to select the study population and the sample size. FGDs were conducted purposively selecting active participants in mangrove related activities with distinct socio-demographic characteristics. Sampled respondents comprised of males and females of different occupations and age groups. Secondary data review was used to select specific SDG targets against which mangrove ecosystem services identified through a value chain analysis were mapped. In Vanga, 20 ecosystem services were identified and categorized under supporting, cultural and aesthetic, provisioning and regulating services. According to the findings of this study, 63.9% (95% ci 56.6-69.3) perceived of the ESs as very important for economic development, 10.3% (95% ci 0-21.3) viewed them as important for environmental and ecological development while 25.8% (95% ci 2.2-32.8) were not sure of any role they play in development. In the social-economic disaggregation, ecosystem service values were found to vary with the level of interaction with the ecosystem which depended on gender and other social-economic classes within the study area. The youths, low income earners, women and those with low education levels were also identified as the primary beneficiaries of mangrove ecosystem services. The study also found that of the 17 SDGs, mangroves have a potential of influencing the achievement 12, including, SDGs 1, 2, 3, 4, 6, 8 10, 12, 13, 14, 15 and 17 either directly or indirectly. Generally therefore, the local community is aware of the critical importance mangroves for enhanced livelihood and ecological services but challenges in sustainability still occur as a result the diverse values and of the services and the contradicting interests of the different actors around the ecosystem. It is therefore important to consider parities in values and perception to avoid a ‘tragedy of the commons’ while striving to enhance sustainability of the Mangrove ecosystem. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sustainable%20development" title="sustainable development">sustainable development</a>, <a href="https://publications.waset.org/abstracts/search?q=community%20values" title=" community values"> community values</a>, <a href="https://publications.waset.org/abstracts/search?q=socio-demographics" title=" socio-demographics"> socio-demographics</a>, <a href="https://publications.waset.org/abstracts/search?q=Vanga" title=" Vanga"> Vanga</a>, <a href="https://publications.waset.org/abstracts/search?q=mangrove%20ecosystem%20services" title=" mangrove ecosystem services"> mangrove ecosystem services</a> </p> <a href="https://publications.waset.org/abstracts/106780/assessment-of-community-perceptions-of-mangrove-ecosystem-services-and-their-link-to-sdgs-in-vanga-kenya" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/106780.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">151</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">1612</span> Implication to Environmental Education of Indigenous Knowledge and the Ecosystem of Upland Farmers in Aklan, Philippines</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Emily%20Arangote">Emily Arangote</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper defined the association between the indigenous knowledge, cultural practices and the ecosystem its implication to the environmental education to the farmers. Farmers recognize the need for sustainability of the ecosystem they inhabit. The cultural practices of farmers on use of indigenous pest control, use of insect-repellant plants, soil management practices that suppress diseases and harmful pests and conserve soil moisture are deemed to be ecologically-friendly. Indigenous plant materials that were more drought- and pest-resistant were grown. Crop rotation was implemented with various crop seeds to increase their disease resistance. Multi-cropping, planting of perennial crops, categorization of soil and planting of appropriate crops, planting of appropriate and leguminous crops, alloting land as watershed, and preserving traditional palay seed varieties were found to be beneficial in preserving the environment. The study also found that indigenous knowledge about crops are still relevant and useful to the current generation. This ensured the sustainability of our environment and incumbent on policy makers and educators to support and preserve for generations yet to come. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cultural%20practices" title="cultural practices">cultural practices</a>, <a href="https://publications.waset.org/abstracts/search?q=ecosystem" title=" ecosystem"> ecosystem</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20education" title=" environmental education"> environmental education</a>, <a href="https://publications.waset.org/abstracts/search?q=indigenous%20knowledge" title=" indigenous knowledge"> indigenous knowledge</a> </p> <a href="https://publications.waset.org/abstracts/79409/implication-to-environmental-education-of-indigenous-knowledge-and-the-ecosystem-of-upland-farmers-in-aklan-philippines" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/79409.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">319</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">1611</span> A Comparative Study of Black Carbon Emission Characteristics from Marine Diesel Engines Using Light Absorption Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dongguk%20Im">Dongguk Im</a>, <a href="https://publications.waset.org/abstracts/search?q=Gunfeel%20Moon"> Gunfeel Moon</a>, <a href="https://publications.waset.org/abstracts/search?q=Younwoo%20Nam"> Younwoo Nam</a>, <a href="https://publications.waset.org/abstracts/search?q=Kangwoo%20Chun"> Kangwoo Chun</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recognition of the needs about protecting environment throughout worldwide is widespread. In the shipping industry, International Maritime Organization (IMO) has been regulating pollutants emitted from ships by MARPOL 73/78. Recently, the Marine Environment Protection Committee (MEPC) of IMO, at its 68th session, approved the definition of Black Carbon (BC) specified by the following physical properties (light absorption, refractory, insolubility and morphology). The committee also agreed to the need for a protocol for any voluntary measurement studies to identify the most appropriate measurement methods. Filter Smoke Number (FSN) based on light absorption is categorized as one of the IMO relevant BC measurement methods. EUROMOT provided a FSN measurement data (measured by smoke meter) of 31 different engines (low, medium and high speed marine engines) of member companies at the 3rd International Council on Clean Transportation (ICCT) workshop on marine BC. From the comparison of FSN, the results indicated that BC emission from low speed marine diesel engines was ranged from 0.009 to 0.179 FSN and it from medium and high speed marine diesel engine was ranged 0.012 to 3.2 FSN. In consideration of measured the low FSN from low speed engine, an experimental study was conducted using both a low speed marine diesel engine (2 stroke, power of 7,400 kW at 129 rpm) and a high speed marine diesel engine (4 stroke, power of 403 kW at 1,800 rpm) under E3 test cycle. The results revealed that FSN was ranged from 0.01 to 0.16 and 1.09 to 1.35 for low and high speed engines, respectively. The measurement equipment (smoke meter) ranges from 0 to 10 FSN. Considering measurement range of it, FSN values from low speed engines are near the detection limit (0.002 FSN or ~0.02 mg/m3). From these results, it seems to be modulated the measurement range of the measurement equipment (smoke meter) for enhancing measurement accuracy of marine BC and evaluation on performance of BC abatement technologies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=black%20carbon" title="black carbon">black carbon</a>, <a href="https://publications.waset.org/abstracts/search?q=filter%20smoke%20number" title=" filter smoke number"> filter smoke number</a>, <a href="https://publications.waset.org/abstracts/search?q=international%20maritime%20organization" title=" international maritime organization"> international maritime organization</a>, <a href="https://publications.waset.org/abstracts/search?q=marine%20diesel%20engine%20%28two%20and%20four%20stroke%29" title=" marine diesel engine (two and four stroke)"> marine diesel engine (two and four stroke)</a>, <a href="https://publications.waset.org/abstracts/search?q=particulate%20matter" title=" particulate matter"> particulate matter</a> </p> <a href="https://publications.waset.org/abstracts/72819/a-comparative-study-of-black-carbon-emission-characteristics-from-marine-diesel-engines-using-light-absorption-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/72819.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">276</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">1610</span> Radioactive Contamination by ¹³⁷Cs in Marine Sediments Taken up from Cuba's North and South Coast</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maris%C3%A9%20Garc%C3%ADa%20Batlle">Marisé García Batlle</a>, <a href="https://publications.waset.org/abstracts/search?q=Juan%20Manuel%20Navarrete%20Tejero"> Juan Manuel Navarrete Tejero</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In aquatic ecosystems, the main indicators of pollution are contaminated sediments, which are the primary repository of radionuclides and chemicals elements in the marine environment. Radioactive Contamination Factor (RCF) has been proposed as a suitable unit to measure the magnitude of radioactive contamination at global scale, caused mainly by more than 2,000 nuclear explosions tests performed during the 1945-65 period. It is obtained as percentage of contaminant radioactivity (¹³⁷Cs) compared to natural radioactivity (⁴⁰K), both expressed in Bq/g of marine sediments conditioned in Marinelli containers and detected in both NaI(Tl) and HPGe detectors. So, in this paper samples of marine sediments were taken up along the occidental Cuban coasts and analyzed by gamma spectrometry for the determination of gamma-emitting radioisotopes with energies between 60 and 2000 keV. The results proved that the proposed method is simple and suitable to evaluated radioactive contamination. Also, the RCF values provide an appropriate indicator to predict which pollution levels in the future will be and if the rate will go down as disintegrates the ¹³⁷Cs present when only 2,4 half-lives have passed away. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cuba" title="Cuba">Cuba</a>, <a href="https://publications.waset.org/abstracts/search?q=gamma%20spectrometry" title=" gamma spectrometry"> gamma spectrometry</a>, <a href="https://publications.waset.org/abstracts/search?q=marine%20sediments" title=" marine sediments"> marine sediments</a>, <a href="https://publications.waset.org/abstracts/search?q=radioactive%20pollution" title=" radioactive pollution"> radioactive pollution</a> </p> <a href="https://publications.waset.org/abstracts/81508/radioactive-contamination-by-137cs-in-marine-sediments-taken-up-from-cubas-north-and-south-coast" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/81508.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">212</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">1609</span> Derivation of Fragility Functions of Marine Drilling Risers Under Ocean Environment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pranjal%20Srivastava">Pranjal Srivastava</a>, <a href="https://publications.waset.org/abstracts/search?q=Piyali%20Sengupta"> Piyali Sengupta</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The performance of marine drilling risers is crucial in the offshore oil and gas industry to ensure safe drilling operation with minimum downtime. Experimental investigations on marine drilling risers are limited in the literature owing to the expensive and exhaustive test setup required to replicate the realistic riser model and ocean environment in the laboratory. Therefore, this study presents an analytical model of marine drilling riser for determining its fragility under ocean environmental loading. In this study, the marine drilling riser is idealized as a continuous beam having a concentric circular cross-section. Hydrodynamic loading acting on the marine drilling riser is determined by Morison’s equations. By considering the equilibrium of forces on the marine drilling riser for the connected and normal drilling conditions, the governing partial differential equations in terms of independent variables z (depth) and t (time) are derived. Subsequently, the Runge Kutta method and Finite Difference Method are employed for solving the partial differential equations arising from the analytical model. The proposed analytical approach is successfully validated with respect to the experimental results from the literature. From the dynamic analysis results of the proposed analytical approach, the critical design parameters peak displacements, upper and lower flex joint rotations and von Mises stresses of marine drilling risers are determined. An extensive parametric study is conducted to explore the effects of top tension, drilling depth, ocean current speed and platform drift on the critical design parameters of the marine drilling riser. Thereafter, incremental dynamic analysis is performed to derive the fragility functions of shallow water and deep-water marine drilling risers under ocean environmental loading. The proposed methodology can also be adopted for downtime estimation of marine drilling risers incorporating the ranges of uncertainties associated with the ocean environment, especially at deep and ultra-deepwater. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=drilling%20riser" title="drilling riser">drilling riser</a>, <a href="https://publications.waset.org/abstracts/search?q=marine" title=" marine"> marine</a>, <a href="https://publications.waset.org/abstracts/search?q=analytical%20model" title=" analytical model"> analytical model</a>, <a href="https://publications.waset.org/abstracts/search?q=fragility" title=" fragility"> fragility</a> </p> <a href="https://publications.waset.org/abstracts/143313/derivation-of-fragility-functions-of-marine-drilling-risers-under-ocean-environment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/143313.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">146</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">1608</span> The Impact of Biodiversity and Urban Ecosystem Services in Real Estate</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Carmen%20Cantuarias-Villessuzanne">Carmen Cantuarias-Villessuzanne</a>, <a href="https://publications.waset.org/abstracts/search?q=Jeffrey%20Blain"> Jeffrey Blain</a>, <a href="https://publications.waset.org/abstracts/search?q=Radmila%20Pineau"> Radmila Pineau</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Our research project aims at analyzing the sensitiveness of French households to urban biodiversity and urban ecosystem services (UES). Opinion surveys show that the French population is sensitive to biodiversity and ecosystem services loss, but the value given to these issues within urban fabric and real estate market lacks evidence. Using GIS data and economic evaluation, by hedonic price methods, weassess the isolated contribution of the explanatory variables of biodiversityand UES on the price of residential real estate. We analyze the variation of the valuefor three urban ecosystem services - flood control, proximity to green spaces, and refreshment - on the price of real estate whena property changes ownership. Our modeling and mapping focus on the price at theIRIS scale (statistical information unit) from 2014 to 2019. The main variables are internal characteristics of housing (area, kind of housing, heating), external characteristics(accessibility and infrastructure, economic, social, and physical environmentsuch as air pollution, noise), and biodiversity indicators and urban ecosystemservices for the Ile-de-France region. Moreover, we compare environmental values on the enhancement of greenspaces and their impact on residential choices. These studies are very useful for real estate developers because they enable them to promote green spaces, and municipalities to become more attractive. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=urban%20ecosystem%20services" title="urban ecosystem services">urban ecosystem services</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable%20real%20estate" title=" sustainable real estate"> sustainable real estate</a>, <a href="https://publications.waset.org/abstracts/search?q=urban%20biodiversity%20perception" title=" urban biodiversity perception"> urban biodiversity perception</a>, <a href="https://publications.waset.org/abstracts/search?q=hedonic%20price" title=" hedonic price"> hedonic price</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20values" title=" environmental values"> environmental values</a> </p> <a href="https://publications.waset.org/abstracts/147354/the-impact-of-biodiversity-and-urban-ecosystem-services-in-real-estate" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/147354.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">132</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">1607</span> Shark Fishing in Iceland: Ocean Oral History</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dalr%C3%BAn%20Kaldakv%C3%ADsl%20Eyger%C3%B0ard%C3%B3ttir">Dalrún Kaldakvísl Eygerðardóttir</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Shark fishing has been practiced for centuries in Iceland. The broad objective of this ongoing research is to study the history of shark fishing in Iceland from the high days of Icelandic shark fishing in the latter half of the 19th century to recent days. The main focus is on shark fishing in the 20th and 21st century. The research sheds light on how sharks have shaped the Icelandic society and how Icelandic society has shaped the lives of sharks, by providing historical context to the relationship between Icelanders and one of the top predators in the North Atlantic Ocean, the Greenland shark. It is important to explore this aspect of Icelandic history further, to enhance people´s understanding of the marine ecosystem from the context of the past and the current increasing concerns about the status of sharks worldwide. Next to nothing has been written about shark fishing in the 20th and 21st Iceland, which shows the importance of interviewing shark fishermen – most of whom are at an old age today. The main methodology used in the research is oral history. Oral history is a large and growing field of research within history, which is based on obtaining oral sources through interviews, analyzing them, and presenting them. The video-poster sheds light on how oral history provides useful historical information on shark fishing and shark conservation in Iceland. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=oral%20history" title="oral history">oral history</a>, <a href="https://publications.waset.org/abstracts/search?q=shark%20fishing%20in%20Iceland" title=" shark fishing in Iceland"> shark fishing in Iceland</a>, <a href="https://publications.waset.org/abstracts/search?q=19.%20and%2021.%20century" title=" 19. and 21. century"> 19. and 21. century</a>, <a href="https://publications.waset.org/abstracts/search?q=shark%20conservation" title=" shark conservation"> shark conservation</a>, <a href="https://publications.waset.org/abstracts/search?q=marine%20environmental%20history" title=" marine environmental history"> marine environmental history</a> </p> <a href="https://publications.waset.org/abstracts/164109/shark-fishing-in-iceland-ocean-oral-history" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/164109.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">82</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">1606</span> An Application of Contingent Valuation Method in Valuing Protected Area: A Case Study of Pulau Kukup National Parks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Mukrimah">A. Mukrimah</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Mohd%20Parid"> M. Mohd Parid</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20F.%20Lim"> H. F. Lim </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Wetland ecosystem has valuable resources that contribute to national income generation and public well-being, either directly by resources that have a market value or indirectly by resources that have no market value. Economic approach is used to evaluate the resources to determine the best use of wetland resources and should be emphasized in policy development planning. This approach is to prevent imbalance in the allocation of resources and welfare benefits. A case study was conducted in 2016 to assess the economic value of wetland ecosystem services at Pulau Kukup National Parks (PKNP). This study has applied dichotomous choice survey design Contingent Valuation Method (CVM) to investigate empirically the willingness-to-pay (WTP) by the public. The study interviewed 400 household respondents at Pontian, Johor. Analysis showed 81% of household interviewed were willing to contribute to the Wetland Conservation Trust Fund. The results also indicated that on average a household was willing to pay RM87 annually. By taking into account 21,664 households in Pontian district in 2016, public’s contribution to conserves wetland ecosystem at PKNP was calculated to be RM1, 884,334. From the public’s interest to contribute to the conservation of wetland ecosystem services at PKNP, it indicates that more concerted effort is needed by both the federal and state governments to conserve and rehabilitate the mangrove ecosystem in Malaysia. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=environmental%20economy" title="environmental economy">environmental economy</a>, <a href="https://publications.waset.org/abstracts/search?q=economic%20valuation" title=" economic valuation"> economic valuation</a>, <a href="https://publications.waset.org/abstracts/search?q=choice%20experiment" title=" choice experiment"> choice experiment</a>, <a href="https://publications.waset.org/abstracts/search?q=Pulau%20Kukup%20national%20parks" title=" Pulau Kukup national parks"> Pulau Kukup national parks</a> </p> <a href="https://publications.waset.org/abstracts/77132/an-application-of-contingent-valuation-method-in-valuing-protected-area-a-case-study-of-pulau-kukup-national-parks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/77132.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">190</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">1605</span> Ecopath Analysis of Trophic Structure in Moroccan Mediterranean Sea and Atlantic Ocean</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salma%20Aboussalam">Salma Aboussalam</a>, <a href="https://publications.waset.org/abstracts/search?q=Karima%20Khalil"> Karima Khalil</a>, <a href="https://publications.waset.org/abstracts/search?q=Khalid%20Elkalay"> Khalid Elkalay</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Ecopath model was utilized to evaluate the trophic structure, function, and current status of the Moroccan Mediterranean Sea ecosystem. The model incorporated 31 functional groups, including fish species, invertebrates, primary producers, and detritus. Through the analysis of trophic interactions among these groups, an average trophic transfer efficiency of 23% was found. The findings revealed that the ecosystem produced more energy than it consumed, with high respiration and consumption rates. Indicators of stability and development were low, indicating that the ecosystem is disturbed by a linear trophic structure. Additionally, keystone species were identified through the use of the keystone index and mixed trophic impact analysis, with demersal invertebrates, zooplankton, and cephalopods found to have a significant impact on other groups. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ecopath" title="ecopath">ecopath</a>, <a href="https://publications.waset.org/abstracts/search?q=food%20web" title=" food web"> food web</a>, <a href="https://publications.waset.org/abstracts/search?q=trophic%20flux" title=" trophic flux"> trophic flux</a>, <a href="https://publications.waset.org/abstracts/search?q=Moroccan%20Mediterranean%20Sea" title=" Moroccan Mediterranean Sea"> Moroccan Mediterranean Sea</a> </p> <a href="https://publications.waset.org/abstracts/161771/ecopath-analysis-of-trophic-structure-in-moroccan-mediterranean-sea-and-atlantic-ocean" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/161771.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">95</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">1604</span> Digital Technologies in Cultural Entrepreneurial Practice in Tech Arts in Morocco: Design or Fine Arts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hiba%20Taim">Hiba Taim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This abstract falls within the scope of entrepreneurship and regulates cultural and creative entrepreneurship. It tackles the topic of "The Ecosystem in Cultural and Creative Entrepreneurship in North Africa". This piece of work deals with the problem of the absence of the ecosystem in cultural and creative enterprises in North Africa, meaning the absence of a clear structure of the ecosystem in the field of cultural and creative entrepreneurship in North Africa. The aim of this research is to create an integrated ecosystem that brings together all those involved in cultural and creative entrepreneurship in North Africa: from training, financial support, continuing, international organizations, government banks, and means of communication. This study is significant not only because it suggests some activities to develop this system but also because it provides all of the information to cultural and creative entrepreneurs in order for them to create project opportunities and activate the entrepreneurship process. It will also enable the creation of opportunities to work among them and formulate common cultural policies to develop the quality of cultural and creative services in North Africa. This research paper uses a qualitative approach to gather information of good quality about the problem being tackled, as well as studying and analyzing different documents and conducting interviews with cultural entrepreneurs, which will help to collect all the information on the state of the ecosystem in North Africa. For the moment, this paperwork is at the stage of collecting preliminary data regarding the problem and developing appropriate schedules for all the phases of the research in order to be productive and deliver this study in the coming months. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cultural%20innovation" title="cultural innovation">cultural innovation</a>, <a href="https://publications.waset.org/abstracts/search?q=design%20innovation" title=" design innovation"> design innovation</a>, <a href="https://publications.waset.org/abstracts/search?q=design%20thinking" title=" design thinking"> design thinking</a>, <a href="https://publications.waset.org/abstracts/search?q=cultural%20entrepreneurship" title=" cultural entrepreneurship"> cultural entrepreneurship</a> </p> <a href="https://publications.waset.org/abstracts/146301/digital-technologies-in-cultural-entrepreneurial-practice-in-tech-arts-in-morocco-design-or-fine-arts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/146301.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">147</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">1603</span> Public Policy as a Component of Entrepreneurship Ecosystems: Challenges of Implementation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20Batista%20de%20Souza%20Neto">José Batista de Souza Neto</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research project has as its theme the implementation of public policies to support micro and small businesses (MSEs). The research problem defined was how public policies for access to markets that drive the entrepreneurial ecosystem of MSEs are implemented. The general objective of this research is to understand the process of implementing a public policy to support the entrepreneurial ecosystem of MSEs by the Support Service for Micro and Small Enterprises of the State of São Paulo (SEBRAESP). Public policies are constituent elements of entrepreneurship ecosystems that influence the creation and development of ventures from the action of the entrepreneur. At the end of the research, it is expected to achieve the results for the following specific objectives: (a) understand how the entrepreneurial ecosystem of MSEs is constituted; (b) understand how market access public policies for MSEs are designed and implemented; (c) understand SEBRAE's role in the entrepreneurship ecosystem; and (d) offer an action plan and monitor its execution up to march, 2023. The field research will be conducted based on Action Research, with a qualitative and longitudinal approach to the data. Data collection will be based on narratives produced since 2019 when the decision to implement Comércio Brasil program, a public policy focused on generating market access for 4280 MSEs yearly, was made. The narratives will be analyzed by the method of document analysis and narrative analysis. It is expected that the research will consolidate the relevance of public policies to market access for MSEs and the role of SEBRAE as a protagonist in the implementation of these public policies in the entrepreneurship ecosystem will be demonstrated. Action research is recognized as an intervention method, it is expected that this research will corroborate its role in supporting management processes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=entrepreneurship" title="entrepreneurship">entrepreneurship</a>, <a href="https://publications.waset.org/abstracts/search?q=entrepreneurship%20ecosystem" title=" entrepreneurship ecosystem"> entrepreneurship ecosystem</a>, <a href="https://publications.waset.org/abstracts/search?q=public%20policies" title=" public policies"> public policies</a>, <a href="https://publications.waset.org/abstracts/search?q=SEBRAE" title=" SEBRAE"> SEBRAE</a>, <a href="https://publications.waset.org/abstracts/search?q=action%20research" title=" action research"> action research</a> </p> <a href="https://publications.waset.org/abstracts/163947/public-policy-as-a-component-of-entrepreneurship-ecosystems-challenges-of-implementation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/163947.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">186</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">1602</span> Impact of Climate Change on Forest Ecosystem Services: In situ Biodiversity Conservation and Sustainable Management of Forest Resources in Tropical Forests</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rajendra%20Kumar%20Pandey">Rajendra Kumar Pandey</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Forest genetic resources not only represent regional biodiversity but also have immense value as the wealth for securing livelihood of poor people. These are vulnerable to ecological due to depletion/deforestation and /or impact of climate change. These resources of various plant categories are vulnerable on the floor of natural tropical forests, and leading to the threat on the growth and development of future forests. More than 170 species, including NTFPs, are in critical condition for their survival in natural tropical forests of Central India. Forest degradation, commensurate with biodiversity loss, is now pervasive, disproportionately affecting the rural poor who directly depend on forests for their subsistence. Looking ahead the interaction between forest and water, soil, precipitation, climate change, etc. and its impact on biodiversity of tropical forests, it is inevitable to develop co-operation policies and programmes to address new emerging realities. Forests ecosystem also known as the 'wealth of poor' providing goods and ecosystem services on a sustainable basis, are now recognized as a stepping stone to move poor people beyond subsistence. Poverty alleviation is the prime objective of the Millennium Development Goals (MDGs). However, environmental sustainability including other MDGs, is essential to ensure successful elimination of poverty and well being of human society. Loss and degradation of ecosystem are the most serious threats to achieving development goals worldwide. Millennium Ecosystem Assessment (MEA, 2005) was an attempt to identify provisioning and regulating cultural and supporting ecosystem services to provide livelihood security of human beings. Climate change may have a substantial impact on ecological structure and function of forests, provisioning, regulations and management of resources which can affect sustainable flow of ecosystem services. To overcome these limitations, policy guidelines with respect to planning and consistent research strategy need to be framed for conservation and sustainable development of forest genetic resources. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=climate%20change" title="climate change">climate change</a>, <a href="https://publications.waset.org/abstracts/search?q=forest%20ecosystem%20services" title=" forest ecosystem services"> forest ecosystem services</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable%20forest%20management" title=" sustainable forest management"> sustainable forest management</a>, <a href="https://publications.waset.org/abstracts/search?q=biodiversity%20conservation" title=" biodiversity conservation"> biodiversity conservation</a> </p> <a href="https://publications.waset.org/abstracts/55054/impact-of-climate-change-on-forest-ecosystem-services-in-situ-biodiversity-conservation-and-sustainable-management-of-forest-resources-in-tropical-forests" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55054.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">297</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">1601</span> Marine Environmental Peace-Building Initiatives: Factors of Success and Failure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yael%20Teff-Seker">Yael Teff-Seker</a> </p> <p class="card-text"><strong>Abstract:</strong></p> More often than not, ecosystems do not follow anthropogenic political borders. Thus, transboundary environmental protection or rehabilitation initiatives can be beneficial and at times even vital for supporting healthy ecosystems. Marine areas demand unique considerations and challenges for such initiatives, as maritime borders tend to be less defined, less fortified and less visible. In areas of recent conflict, cross-border environmental initiatives can also improve relations between states and promote peace-building efforts, in addition to their environmental benefits. The current study reviews the current literature on transboundary marine environmental protection initiatives that take place in these areas and focuses on joint initiatives in Israel-Jordan and Croatia-Slovenia. In addition to factors described in the literature such as funding and third-party involvement, findings suggest that the peripheral location of marine environmental initiatives can be beneficial for the success of such initiatives, as well as facilitating border crossing and the extent to which such initiatives advance other governmental goals. A sense of urgency, environmental or other, has also been found to be highly relevant to project success. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=environmental%20cooperation" title="environmental cooperation">environmental cooperation</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20peacebuilding" title=" environmental peacebuilding"> environmental peacebuilding</a>, <a href="https://publications.waset.org/abstracts/search?q=marine%20environment" title=" marine environment"> marine environment</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20conflict" title=" environmental conflict"> environmental conflict</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20management" title=" environmental management"> environmental management</a> </p> <a href="https://publications.waset.org/abstracts/104413/marine-environmental-peace-building-initiatives-factors-of-success-and-failure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/104413.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">179</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">1600</span> A Review On Traditional Agroforestry Systems In Europe Revisited: Biodiversity, Ecosystem Services, And Future Perspectives</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Thuy%20Hang%20Le">Thuy Hang Le</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Traditional agroforestry systems are land-use practices still widespread in tropical and subtropical countries, while in Europe have significantly decreased due to land-use intensification, land abandonment, and urbanization. Nevertheless, scientific evidence reveals that traditional agroforestry systems significantly support biodiversity and ecosystem services and may positively contribute to socioeconomic rural regional development. We worked out a review that follows the PRISMA approach and compiled comprehensive information on traditional agroforestry systems in Europe. Based on the differentiation of different land-use systems, also considering the agricultural as well as forestry components, we compiled information regarding current distribution, management (agrodiversity), biodiversity and agrobiodiversity, ecosystem and landscape services, threats, and restoration initiatives. From a total of 3,304 studies that dealt with agroforestry systems in Europe, both “modern” (e.g., buffer strip) and “traditional” (e.g., meadow orchards), we filtered out 158 studies from 35 European countries which represent the basis for in-depth investigation. We found, for example, that the traditional pastoral agroforestry system in the Mediterranean region, the so-called Dehesa, can harbor up to 300 plant species as well as 238 bird species, of which 134 are breeding birds. With regard to carbon storage, the traditional orchard agroforestry system in Germany stocks ranged between 6.5 and 9.8 Mg C ha−1, showing significantly higher values compared to an intensively used grassland with around 3.4 to 6.7 Mg C ha−1. With the remarkably high benefit for biodiversity and ecosystem services provided, the important role and multifunctionality of traditional agroforestry systems in Europe should be acknowledged and promoted. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biodiversity" title="biodiversity">biodiversity</a>, <a href="https://publications.waset.org/abstracts/search?q=ecosystem%20services" title=" ecosystem services"> ecosystem services</a>, <a href="https://publications.waset.org/abstracts/search?q=landscape%20services" title=" landscape services"> landscape services</a>, <a href="https://publications.waset.org/abstracts/search?q=traditional%20agroforestry%20systems" title=" traditional agroforestry systems"> traditional agroforestry systems</a> </p> <a href="https://publications.waset.org/abstracts/169777/a-review-on-traditional-agroforestry-systems-in-europe-revisited-biodiversity-ecosystem-services-and-future-perspectives" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/169777.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">73</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">1599</span> Operational Challenges of Marine Fiber Reinforced Polymer Composite Structures Coupled with Piezoelectric Transducers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Ucar">H. Ucar</a>, <a href="https://publications.waset.org/abstracts/search?q=U.%20Aridogan"> U. Aridogan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Composite structures become intriguing for the design of aerospace, automotive and marine applications due to weight reduction, corrosion resistance and radar signature reduction demands and requirements. Studies on piezoelectric ceramic transducers (PZT) for diagnostics and health monitoring have gained attention for their sensing capabilities, however PZT structures are prone to fail in case of heavy operational loads. In this paper, we develop a piezo-based Glass Fiber Reinforced Polymer (GFRP) composite finite element (FE) model, validate with experimental setup, and identify the applicability and limitations of PZTs for a marine application. A case study is conducted to assess the piezo-based sensing capabilities in a representative marine composite structure. A FE model of the composite structure combined with PZT patches is developed, afterwards the response and functionality are investigated according to the sea conditions. Results of this study clearly indicate the blockers and critical aspects towards industrialization and wide-range use of PZTs for marine composite applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=FRP%20composite" title="FRP composite">FRP composite</a>, <a href="https://publications.waset.org/abstracts/search?q=operational%20challenges" title=" operational challenges"> operational challenges</a>, <a href="https://publications.waset.org/abstracts/search?q=piezoelectric%20transducers" title=" piezoelectric transducers"> piezoelectric transducers</a>, <a href="https://publications.waset.org/abstracts/search?q=FE%20modeling" title=" FE modeling"> FE modeling</a> </p> <a href="https://publications.waset.org/abstracts/134034/operational-challenges-of-marine-fiber-reinforced-polymer-composite-structures-coupled-with-piezoelectric-transducers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134034.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">174</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">1598</span> Integrating and Evaluating Computational Thinking in an Undergraduate Marine Science Course</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dana%20Christensen">Dana Christensen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Undergraduate students, particularly in the environmental sciences, have difficulty displaying quantitative skills in their laboratory courses. Students spend time sampling in the field, often using new methods, and are expected to make sense of the data they collect. Computational thinking may be used to navigate these new experiences. We developed a curriculum for the marine science department at a small liberal arts college in the Northeastern United States based on previous computational thinking frameworks. This curriculum incorporates marine science data sets with specific objectives and topics selected by the faculty at the College. The curriculum was distributed to all students enrolled in introductory marine science classes as a mandatory module. Two pre-tests and post-tests will be used to quantitatively assess student progress on both content-based and computational principles. Student artifacts are being collected with each lesson to be coded for content-specific and computational-specific items in qualitative assessment. There is an overall gap in marine science education research, especially curricula that focus on computational thinking and associated quantitative assessment. The curricula itself, the assessments, and our results may be modified and applied to other environmental science courses due to the nature of the inquiry-based laboratory components that use quantitative skills to understand nature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=marine%20science" title="marine science">marine science</a>, <a href="https://publications.waset.org/abstracts/search?q=computational%20thinking" title=" computational thinking"> computational thinking</a>, <a href="https://publications.waset.org/abstracts/search?q=curriculum%20assessment" title=" curriculum assessment"> curriculum assessment</a>, <a href="https://publications.waset.org/abstracts/search?q=quantitative%20skills" title=" quantitative skills"> quantitative skills</a> </p> <a href="https://publications.waset.org/abstracts/173934/integrating-and-evaluating-computational-thinking-in-an-undergraduate-marine-science-course" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/173934.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">59</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">1597</span> Relationships between Actors within Business Ecosystems That Adopt Circular Strategies: A Systematic Literature Review</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sophia%20Barquete">Sophia Barquete</a>, <a href="https://publications.waset.org/abstracts/search?q=Adriana%20H.%20Trevisan"> Adriana H. Trevisan</a>, <a href="https://publications.waset.org/abstracts/search?q=Janaina%20Mascarenhas"> Janaina Mascarenhas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The circular economy (CE) aims at the cycling of resources through restorative and regenerative strategies. To achieve circularity, coordination of several actors who have different responsibilities is necessary. The interaction among multiple actors allows the connection between the CE and business ecosystem research fields. Although fundamental, the relationships between actors within an ecosystem to foster circularity are not deeply explored in the literature. The objective of this study was to identify the possibilities of cooperation, competition, or even coopetition among the members of business ecosystems that adopt circular strategies. In particular, the motivations that make these actors interact to achieve a circular economy were investigated. A systematic literature review was adopted to select business ecosystem cases that adopt circular strategies. As a result, several motivations were identified for actors to engage in relationships within ecosystems, such as sharing knowledge and infrastructure, developing products with a circular design, promoting reverse logistics, among others. The results suggest that partnerships between actors are, in fact, important for the implementation of circular strategies. In order to achieve a complete and circular solution, actors must be able to clearly understand their roles and relationships within the network so that they can establish new partnerships or reframe those already established. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=business%20ecosystem" title="business ecosystem">business ecosystem</a>, <a href="https://publications.waset.org/abstracts/search?q=circular%20economy" title=" circular economy"> circular economy</a>, <a href="https://publications.waset.org/abstracts/search?q=cooperation" title=" cooperation"> cooperation</a>, <a href="https://publications.waset.org/abstracts/search?q=coopetition" title=" coopetition"> coopetition</a>, <a href="https://publications.waset.org/abstracts/search?q=competition" title=" competition"> competition</a> </p> <a href="https://publications.waset.org/abstracts/142483/relationships-between-actors-within-business-ecosystems-that-adopt-circular-strategies-a-systematic-literature-review" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142483.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">226</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">1596</span> Effects of Coastal Structure Construction on Ecosystem</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Afshin%20Jahangirzadeh">Afshin Jahangirzadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Shatirah%20Akib"> Shatirah Akib</a>, <a href="https://publications.waset.org/abstracts/search?q=Keyvan%20Kimiaei"> Keyvan Kimiaei</a>, <a href="https://publications.waset.org/abstracts/search?q=Hossein%20Basser"> Hossein Basser</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Coastal defense structures were built to protect part of shore from beach erosion and flooding by sea water. Effects of coastal defense structures can be negative or positive. Some of the effects are beneficial in socioeconomic aspect, but environment matters should be given more concerns because it can bring bad consequences to the earth landscape and make the ecosystem be unbalanced. This study concerns on the negative impacts as they are dominant. Coastal structures can extremely impact the shoreline configuration. Artificial structures can influence sediment transport, split the coastal space, etc. This can result in habitats loss and lead to noise and visual disturbance of birds. There are two types of coastal defense structures, hard coastal structure and soft coastal structure. Both coastal structures have their own impacts. The impacts are induced during the construction, maintaining, and operation of the structures. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ecosystem" title="ecosystem">ecosystem</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20impact" title=" environmental impact"> environmental impact</a>, <a href="https://publications.waset.org/abstracts/search?q=hard%20coastal%20structures" title=" hard coastal structures"> hard coastal structures</a>, <a href="https://publications.waset.org/abstracts/search?q=soft%20coastal%20structures" title=" soft coastal structures"> soft coastal structures</a> </p> <a href="https://publications.waset.org/abstracts/9173/effects-of-coastal-structure-construction-on-ecosystem" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9173.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">485</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">1595</span> Ecosystem Services Assessment for Urban Nature-Based Solutions Implemented in the Public Space: Case Study of Alhambra Square in Bogotá, Colombia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Diego%20S%C3%A1nchez">Diego Sánchez</a>, <a href="https://publications.waset.org/abstracts/search?q=Sandra%20M.%20Aguilar"> Sandra M. Aguilar</a>, <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20F.%20G%C3%B3mez"> José F. Gómez</a>, <a href="https://publications.waset.org/abstracts/search?q=Gustavo%20Monta%C3%B1o"> Gustavo Montaño</a>, <a href="https://publications.waset.org/abstracts/search?q=Laura%20P.%20Otero"> Laura P. Otero</a>, <a href="https://publications.waset.org/abstracts/search?q=Carlos%20V.%20Rey"> Carlos V. Rey</a>, <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20A.%20Mart%C3%ADnez"> José A. Martínez</a>, <a href="https://publications.waset.org/abstracts/search?q=Juliana%20Robles"> Juliana Robles</a>, <a href="https://publications.waset.org/abstracts/search?q=Jorge%20E.%20Burgos"> Jorge E. Burgos</a>, <a href="https://publications.waset.org/abstracts/search?q=Juan%20S.%20L%C3%B3pez"> Juan S. López</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Bogota is making efforts towards urban resilience through Nature-based Solutions (NbS) incorporation in public projects as a climate change resilience strategy. The urban renovation project on the Alhambra square includes Green Infrastructure (GI), like Sustainable Urban Drainage Systems (SUDS) and Urban Trees (UT), as ecosystem services (ES) boosters. This study analyzes 3 scenarios: (1) the initial situation without NbS, (2) the expected situation including NbS in the design and (3) the projection of the second one after 30 years, calculating the ecosystem services, the stormwater management benefits provided by SUDS and the cultural services. The obtained results contribute to the understanding of the urban NbS benefits in public spaces, providing valuable information to foster investment in sustainable projects and encouraging policy makers to integrate NbS in urban planning. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ecosystem%20services" title="ecosystem services">ecosystem services</a>, <a href="https://publications.waset.org/abstracts/search?q=nature-based%20solutions" title=" nature-based solutions"> nature-based solutions</a>, <a href="https://publications.waset.org/abstracts/search?q=stormwater%20management" title=" stormwater management"> stormwater management</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable%20urban%20drainage%20systems" title=" sustainable urban drainage systems"> sustainable urban drainage systems</a> </p> <a href="https://publications.waset.org/abstracts/151635/ecosystem-services-assessment-for-urban-nature-based-solutions-implemented-in-the-public-space-case-study-of-alhambra-square-in-bogota-colombia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151635.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">156</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">1594</span> Hydrological Method to Evaluate Environmental Flow: Case Study of Gharasou River, Ardabil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Fuladipanah">Mehdi Fuladipanah</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Jorabloo"> Mehdi Jorabloo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Water flow management is one of the most important parts of river engineering. Non-uniformity distribution of rainfall and various flow demand with unreasonable flow management will be caused destroyed of the river ecosystem. Then, it is severe to determine ecosystem flow requirement. In this paper, Flow duration curve indices method which has hydrological based was used to evaluate environmental flow in Gharasou River, Ardabil, Iran. Using flow duration curve, Q90 and Q95 for different return periods were calculated. Their magnitude was determined as 1-day, 3-day, 7-day, and 30 days. According to the second method, hydraulic alteration indices often had low and medium range. To maintain river at an acceptable ecological condition, minimum daily discharge of index Q95 is 0.7 m^3.s^-1. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gharasou%20River" title="Gharasou River">Gharasou River</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20flow%20management" title=" water flow management"> water flow management</a>, <a href="https://publications.waset.org/abstracts/search?q=non-uniformity%20distribution" title=" non-uniformity distribution"> non-uniformity distribution</a>, <a href="https://publications.waset.org/abstracts/search?q=ecosystem%20flow%20requirement" title=" ecosystem flow requirement"> ecosystem flow requirement</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20alteration" title=" hydraulic alteration"> hydraulic alteration</a> </p> <a href="https://publications.waset.org/abstracts/22677/hydrological-method-to-evaluate-environmental-flow-case-study-of-gharasou-river-ardabil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22677.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">335</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">1593</span> Comparison of Quality Indices for Sediment Assessment in Ireland</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tayyaba%20%20Bibi">Tayyaba Bibi</a>, <a href="https://publications.waset.org/abstracts/search?q=Jenny%20%20Ronan"> Jenny Ronan</a>, <a href="https://publications.waset.org/abstracts/search?q=Robert%20%20Hernan"> Robert Hernan</a>, <a href="https://publications.waset.org/abstracts/search?q=Kathleen%20%20O%E2%80%99Rourke"> Kathleen O’Rourke</a>, <a href="https://publications.waset.org/abstracts/search?q=Brendan%20%20McHugh"> Brendan McHugh</a>, <a href="https://publications.waset.org/abstracts/search?q=Evin%20%20McGovern"> Evin McGovern</a>, <a href="https://publications.waset.org/abstracts/search?q=Michelle%20%20Giltrap"> Michelle Giltrap</a>, <a href="https://publications.waset.org/abstracts/search?q=Gordon%20Chambers"> Gordon Chambers</a>, <a href="https://publications.waset.org/abstracts/search?q=James%20Wilson"> James Wilson</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sediment contamination is a major source of ecosystem stress and has received significant attention from the scientific community. Both the Water Framework Directive (WFD) and Marine Strategy Framework Directive (MSFD) require a robust set of tools for biological and chemical monitoring. For the MSFD in particular, causal links between contaminant and effects need to be assessed. Appropriate assessment tools are required in order to make an accurate evaluation. In this study, a range of recommended sediment bioassays and chemical measurements are assessed in a number of potentially impacted and lowly impacted locations around Ireland. Previously, assessment indices have been developed on individual compartments, i.e. contaminant levels or biomarker/bioassay responses. A number of assessment indices are applied to chemical and ecotoxicological data from the Seachange project (Project code) and compared including the metal pollution index (MPI), pollution load index (PLI) and Chapman index for chemistry as well as integrated biomarker response (IBR). The benefits and drawbacks of the use of indices and aggregation techniques are discussed. In addition to this, modelling of raw data is investigated to analyse links between contaminant and effects. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bioassays" title="bioassays">bioassays</a>, <a href="https://publications.waset.org/abstracts/search?q=contamination%20indices" title=" contamination indices"> contamination indices</a>, <a href="https://publications.waset.org/abstracts/search?q=ecotoxicity" title=" ecotoxicity"> ecotoxicity</a>, <a href="https://publications.waset.org/abstracts/search?q=marine%20environment" title=" marine environment"> marine environment</a>, <a href="https://publications.waset.org/abstracts/search?q=sediments" title=" sediments"> sediments</a> </p> <a href="https://publications.waset.org/abstracts/84860/comparison-of-quality-indices-for-sediment-assessment-in-ireland" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84860.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">228</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">1592</span> Second Sub-Harmonic Resonance in Vortex-Induced Vibrations of a Marine Pipeline Close to the Seabed</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yiming%20Jin">Yiming Jin</a>, <a href="https://publications.waset.org/abstracts/search?q=Yuanhao%20Gao"> Yuanhao Gao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, using the method of multiple scales, the second sub-harmonic resonance in vortex-induced vibrations (VIV) of a marine pipeline close to the seabed is investigated based on a developed wake oscillator model. The amplitude-frequency equations are also derived. It is found that the oscillation will increase all the time when both discriminants of the amplitude-frequency equations are positive while the oscillation will decay when the discriminants are negative. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vortex-induced%20vibrations" title="vortex-induced vibrations">vortex-induced vibrations</a>, <a href="https://publications.waset.org/abstracts/search?q=marine%20pipeline" title=" marine pipeline"> marine pipeline</a>, <a href="https://publications.waset.org/abstracts/search?q=seabed" title=" seabed"> seabed</a>, <a href="https://publications.waset.org/abstracts/search?q=sub-harmonic%20resonance" title=" sub-harmonic resonance"> sub-harmonic resonance</a> </p> <a href="https://publications.waset.org/abstracts/50829/second-sub-harmonic-resonance-in-vortex-induced-vibrations-of-a-marine-pipeline-close-to-the-seabed" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50829.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">332</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">1591</span> Proposal of Blue and Green Infrastructure for the Jaguaré Stream Watershed, São Paulo, Brazil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Juliana%20C.%20Alencar">Juliana C. Alencar</a>, <a href="https://publications.waset.org/abstracts/search?q=Monica%20Ferreira%20do%20Amaral%20Porto"> Monica Ferreira do Amaral Porto</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The blue-green infrastructure in recent years has been pointed out as a possibility to increase the environmental quality of watersheds. The regulation ecosystem services brought by these areas are many, such as the improvement of the air quality of the air, water, soil, microclimate, besides helping to control the peak flows and to promote the quality of life of the population. This study proposes a blue-green infrastructure scenario for the Jaguaré watershed, located in the western zone of the São Paulo city in Brazil. Based on the proposed scenario, it was verified the impact of the adoption of the blue and green infrastructure in the control of the peak flow of the basin, the benefits for the avifauna that are also reflected in the flora and finally, the quantification of the regulation ecosystem services brought by the adoption of the scenario proposed. A survey of existing green areas and potential areas for expansion and connection of these areas to form a network in the watershed was carried out. Based on this proposed new network of green areas, the peak flow for the proposed scenario was calculated with the help of software, ABC6. Finally, a survey of the ecosystem services contemplated in the proposed scenario was made. It was possible to conclude that the blue and green infrastructure would provide several regulation ecosystem services for the watershed, such as the control of the peak flow, the connection frame between the forest fragments that promoted the environmental enrichment of these fragments, improvement of the microclimate and the provision of leisure areas for the population. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=green%20and%20blue%20infrastructure" title="green and blue infrastructure">green and blue infrastructure</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable%20drainage" title=" sustainable drainage"> sustainable drainage</a>, <a href="https://publications.waset.org/abstracts/search?q=urban%20waters" title=" urban waters"> urban waters</a>, <a href="https://publications.waset.org/abstracts/search?q=ecosystem%20services" title=" ecosystem services"> ecosystem services</a> </p> <a href="https://publications.waset.org/abstracts/97019/proposal-of-blue-and-green-infrastructure-for-the-jaguare-stream-watershed-sao-paulo-brazil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97019.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">117</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">1590</span> Bioeconomic Modeling for the Sustainable Exploitation of Three Key Marine Species in Morocco</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=I%20.Ait%20El%20Harch">I .Ait El Harch</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Outaaoui"> K. Outaaoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20El%20Foutayeni"> Y. El Foutayeni</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study aims to deepen the understanding and optimize fishing activity in Morocco by holistically integrating biological and economic aspects. We develop a biological equilibrium model in which these competing species present their natural growth by logistic equations, taking into account density and competition between them. The integration of human intervention adds a realistic dimension to our model. A company specifically targets the three species, thus influencing population dynamics according to their fishing activities. The aim of this work is to determine the fishing effort that maximizes the company’s profit, taking into account the constraints associated with conserving ecosystem equilibrium. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bioeconomical%20modeling" title="bioeconomical modeling">bioeconomical modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization%20techniques" title=" optimization techniques"> optimization techniques</a>, <a href="https://publications.waset.org/abstracts/search?q=linear%20complementarity%20problem%20LCP" title=" linear complementarity problem LCP"> linear complementarity problem LCP</a>, <a href="https://publications.waset.org/abstracts/search?q=biological%20equilibrium" title=" biological equilibrium"> biological equilibrium</a>, <a href="https://publications.waset.org/abstracts/search?q=maximizing%20profits" title=" maximizing profits"> maximizing profits</a> </p> <a href="https://publications.waset.org/abstracts/191741/bioeconomic-modeling-for-the-sustainable-exploitation-of-three-key-marine-species-in-morocco" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/191741.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">24</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">1589</span> Optimization of Marine Waste Collection Considering Dynamic Transport and Ship’s Wake Impact</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Guillaume%20Richard">Guillaume Richard</a>, <a href="https://publications.waset.org/abstracts/search?q=Sarra%20Zaied"> Sarra Zaied</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Marine waste quantities increase more and more, 5 million tons of plastic waste enter the ocean every year. Their spatiotemporal distribution is never homogeneous and depends mainly on the hydrodynamic characteristics of the environment, as well as the size and location of the waste. As part of optimizing collect of marine plastic wastes, it is important to measure and monitor their evolution over time. In this context, diverse studies have been dedicated to describing waste behavior in order to identify its accumulation in ocean areas. None of the existing tools which track objects at sea had the objective of tracking down a slick of waste. Moreover, the applications related to marine waste are in the minority compared to rescue applications or oil slicks tracking applications. These approaches are able to accurately simulate an object's behavior over time but not during the collection mission of a waste sheet. This paper presents numerical modeling of a boat’s wake impact on the floating marine waste behavior during a collection mission. The aim is to predict the trajectory of a marine waste slick to optimize its collection using meteorological data of ocean currents, wind, and possibly waves. We have made the choice to use Ocean Parcels which is a Python library suitable for trajectoring particles in the ocean. The modeling results showed the important role of advection and diffusion processes in the spatiotemporal distribution of floating plastic litter. The performance of the proposed method was evaluated on real data collected from the Copernicus Marine Environment Monitoring Service (CMEMS). The results of the evaluation in Cape of Good Hope (South Africa) prove that the proposed approach can effectively predict the position and velocity of marine litter during collection, which allowed for optimizing time and more than $90\%$ of the amount of collected waste. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=marine%20litter" title="marine litter">marine litter</a>, <a href="https://publications.waset.org/abstracts/search?q=advection-diffusion%20equation" title=" advection-diffusion equation"> advection-diffusion equation</a>, <a href="https://publications.waset.org/abstracts/search?q=sea%20current" title=" sea current"> sea current</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20model" title=" numerical model"> numerical model</a> </p> <a href="https://publications.waset.org/abstracts/170765/optimization-of-marine-waste-collection-considering-dynamic-transport-and-ships-wake-impact" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/170765.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">87</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">1588</span> Numerical Analysis of the Turbulent Flow around DTMB 4119 Marine Propeller</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20Boumediene">K. Boumediene</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20E.%20Belhenniche"> S. E. Belhenniche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article presents a numerical analysis of a turbulent flow past DTMB 4119 marine propeller by the means of RANS approach; the propeller designed at David Taylor Model Basin in USA. The purpose of this study is to predict the hydrodynamic performance of the marine propeller, it aims also to compare the results obtained with the experiment carried out in open water tests; a periodical computational domain was created to reduce the unstructured mesh size generated. The standard kw turbulence model for the simulation is selected; the results were in a good agreement. Therefore, the errors were estimated respectively to 1.3% and 5.9% for KT and KQ. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=propeller%20flow" title="propeller flow">propeller flow</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD%20simulation" title=" CFD simulation"> CFD simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=RANS" title=" RANS"> RANS</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic%20performance" title=" hydrodynamic performance"> hydrodynamic performance</a> </p> <a href="https://publications.waset.org/abstracts/41112/numerical-analysis-of-the-turbulent-flow-around-dtmb-4119-marine-propeller" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41112.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">499</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">1587</span> Modeling the Impact of Aquaculture in Wetland Ecosystems Using an Integrated Ecosystem Approach: Case Study of Setiu Wetlands, Malaysia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Roseliza%20Mat%20Alipiah">Roseliza Mat Alipiah</a>, <a href="https://publications.waset.org/abstracts/search?q=David%20Raffaelli"> David Raffaelli</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20C.%20R.%20Smart"> J. C. R. Smart</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research is a new approach as it integrates information from both environmental and social sciences to inform effective management of the wetlands. A three-stage research framework was developed for modelling the drivers and pressures imposed on the wetlands and their impacts to the ecosystem and the local communities. Firstly, a Bayesian Belief Network (BBN) was used to predict the probability of anthropogenic activities affecting the delivery of different key wetland ecosystem services under different management scenarios. Secondly, Choice Experiments (CEs) were used to quantify the relative preferences which key wetland stakeholder group (aquaculturists) held for delivery of different levels of these key ecosystem services. Thirdly, a Multi-Criteria Decision Analysis (MCDA) was applied to produce an ordinal ranking of the alternative management scenarios accounting for their impacts upon ecosystem service delivery as perceived through the preferences of the aquaculturists. This integrated ecosystem management approach was applied to a wetland ecosystem in Setiu, Terengganu, Malaysia which currently supports a significant level of aquaculture activities. This research has produced clear guidelines to inform policy makers considering alternative wetland management scenarios: Intensive Aquaculture, Conservation or Ecotourism, in addition to the Status Quo. The findings of this research are as follows: The BBN revealed that current aquaculture activity is likely to have significant impacts on water column nutrient enrichment, but trivial impacts on caged fish biomass, especially under the Intensive Aquaculture scenario. Secondly, the best fitting CE models identified several stakeholder sub-groups for aquaculturists, each with distinct sets of preferences for the delivery of key ecosystem services. Thirdly, the MCDA identified Conservation as the most desirable scenario overall based on ordinal ranking in the eyes of most of the stakeholder sub-groups. Ecotourism and Status Quo scenarios were the next most preferred and Intensive Aquaculture was the least desirable scenario. The methodologies developed through this research provide an opportunity for improving planning and decision making processes that aim to deliver sustainable management of wetland ecosystems in Malaysia. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bayesian%20belief%20network%20%28BBN%29" title="Bayesian belief network (BBN)">Bayesian belief network (BBN)</a>, <a href="https://publications.waset.org/abstracts/search?q=choice%20experiments%20%28CE%29" title=" choice experiments (CE)"> choice experiments (CE)</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-criteria%20decision%20analysis%20%28MCDA%29" title=" multi-criteria decision analysis (MCDA)"> multi-criteria decision analysis (MCDA)</a>, <a href="https://publications.waset.org/abstracts/search?q=aquaculture" title=" aquaculture"> aquaculture</a> </p> <a href="https://publications.waset.org/abstracts/6690/modeling-the-impact-of-aquaculture-in-wetland-ecosystems-using-an-integrated-ecosystem-approach-case-study-of-setiu-wetlands-malaysia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6690.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">294</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">1586</span> Community Assemblages of Reef Fishes in Marine Sanctuary and Non-Marine Sanctuary Areas in Sogod Bay, Southern Leyte, Philippines</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Homer%20Hermes%20De%20Dios">Homer Hermes De Dios</a>, <a href="https://publications.waset.org/abstracts/search?q=Dewoowoogen%20Baclayon"> Dewoowoogen Baclayon</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The community assemblages of reef fishes was conducted in ten marine sanctuaries and ten non-marine sanctuary areas in Sogod Bay, Southern Leyte, Philippines from 2014-2015. A total of 223 species belonging to 39 families of reef fishes in Sogod Bay were recorded. Family Pomacentridae (e.g. damsel fishes) has the highest number of species (42), followed by Labridae or wrasses (27), Chaetodonthidae or butterfly fish (22), Scaridae or parrotfishes (17), and Acanthuridae (surgeonfishes) and Pomacanthidae (angelfishes) both with 10 species. Two of the recorded fish species were included in the IUCN Red List, wherein one is near threatened (Chlorurus bowersi) and the other is endangered species (Cheilinus undulatus). The mean total fish biomass (target + indicator + major or other fish) in MPA was significantly higher (13,468 g/500m2 or equivalent to 26.94 mt/km2) than Non-MPA with 7,408 g/500m2 or 15,216mt/km2 in Non-MPA. The mean total fish biomass in MPAs in Sogod Bay can be categorized as high (21-40 mt/km2) with minimal fishing and medium or slightly moderately fished (11-20 mt/km2) in Non-MPAs. The mean (±SE) biomass of target fishes was significantly higher in MPA than Non-MPA and differ significantly across two depths. The target fish biomass was significantly higher in Limasawa Marine Sanctuary (13,569 g/500m2) followed by Lungsodaan Marine Sanctuary in Padre Burgos (11,884 g/500m2) and the lowest was found in San Isidro (735 g/500m2). The mean total fish density (target + indicator + major or other fish) did not differ between Marine Protected area (607.912 fishes/500m2 or 1215.824 fishes/1000m2) and 525.937 fishes/500m2 in non-Marine Protected Area and can be categorized as moderate (667-2267mt/km2). The mean density of target fishes was significantly (p=0.022) higher in deeper areas (12-15m) than in shallow areas but did not differ significantly between MPAs and Non-MPA. No significant difference of the biomass and density for indicator and other fishes in MPAs and Non-MPAs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=abundance" title="abundance">abundance</a>, <a href="https://publications.waset.org/abstracts/search?q=density" title=" density"> density</a>, <a href="https://publications.waset.org/abstracts/search?q=species%20richness" title=" species richness"> species richness</a>, <a href="https://publications.waset.org/abstracts/search?q=target%20fish" title=" target fish"> target fish</a>, <a href="https://publications.waset.org/abstracts/search?q=coral%20reef%20management" title=" coral reef management"> coral reef management</a> </p> <a href="https://publications.waset.org/abstracts/59121/community-assemblages-of-reef-fishes-in-marine-sanctuary-and-non-marine-sanctuary-areas-in-sogod-bay-southern-leyte-philippines" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59121.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">311</span> </span> </div> </div> <ul class="pagination"> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=marine%20ecosystem&page=3" rel="prev">&lsaquo;</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=marine%20ecosystem&page=1">1</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=marine%20ecosystem&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=marine%20ecosystem&page=3">3</a></li> <li class="page-item active"><span class="page-link">4</span></li> <li class="page-item"><a class="page-link" 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