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(PDF) Microbial loop of a Proterozoic ocean analogue | JASPREET SAINI - Academia.edu

<!DOCTYPE html> <html > <head> <meta charset="utf-8"> <meta rel="search" type="application/opensearchdescription+xml" href="/open_search.xml" title="Academia.edu"> <meta content="width=device-width, initial-scale=1" name="viewport"> <meta name="google-site-verification" content="bKJMBZA7E43xhDOopFZkssMMkBRjvYERV-NaN4R6mrs"> <meta name="csrf-param" content="authenticity_token" /> <meta name="csrf-token" content="ZqE8s/lw1MR7Os00Al6SRiilygam4kBfaLDPf2dioxUqPEvgOADwnbbtbNZ5FqpNM4Yd+RqYV+QyfQnz8AJcjA==" /> <meta name="citation_title" content="Microbial loop of a Proterozoic ocean analogue" /> <meta name="citation_publication_date" content="2021" /> <meta name="citation_author" content="Jaspreet S Saini" /> <meta name="citation_author" content="Christel Hassler" /> <meta name="citation_author" content="Rachel Cable" /> <meta name="citation_author" content="Marion Fourquez" /> <meta name="citation_author" content="Francesco Danza" /> <meta name="citation_author" content="Samuele Roman" /> <meta name="citation_author" content="Mauro Tonolla" /> <meta name="citation_author" content="Nicola Storelli" /> <meta name="citation_author" content="Stéphan Jacquet" /> <meta name="citation_author" content="Evgeny M. 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Although the anaerobic microbial ecology of the lake has been extensively studied for at" /> <meta name="twitter:image" content="http://a.academia-assets.com/images/twitter-card.jpeg" /> <meta property="fb:app_id" content="2369844204" /> <meta property="og:type" content="article" /> <meta property="og:url" content="https://www.academia.edu/90746907/Microbial_loop_of_a_Proterozoic_ocean_analogue" /> <meta property="og:title" content="Microbial loop of a Proterozoic ocean analogue" /> <meta property="og:image" content="http://a.academia-assets.com/images/open-graph-icons/fb-paper.gif" /> <meta property="og:description" content="Meromictic Lake Cadagno, an ancient ocean analogue, is known for its permanent stratification and persistent anoxygenic microbial bloom within the chemocline. Although the anaerobic microbial ecology of the lake has been extensively studied for at" /> <meta property="article:author" content="https://independent.academia.edu/JASPREETSAINI17" /> <meta name="description" content="Meromictic Lake Cadagno, an ancient ocean analogue, is known for its permanent stratification and persistent anoxygenic microbial bloom within the chemocline. Although the anaerobic microbial ecology of the lake has been extensively studied for at" /> <title>(PDF) Microbial loop of a Proterozoic ocean analogue | JASPREET SAINI - Academia.edu</title> <link rel="canonical" href="https://www.academia.edu/90746907/Microbial_loop_of_a_Proterozoic_ocean_analogue" /> <script async src="https://www.googletagmanager.com/gtag/js?id=G-5VKX33P2DS"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-5VKX33P2DS', { cookie_domain: 'academia.edu', send_page_view: false, }); gtag('event', 'page_view', { 'controller': "single_work", 'action': "show", 'controller_action': 'single_work#show', 'logged_in': 'false', 'edge': 'unknown', // Send nil if there is no A/B test bucket, in case some records get logged // with missing data - that way we can distinguish between the two cases. // ab_test_bucket should be of the form <ab_test_name>:<bucket> 'ab_test_bucket': null, }) </script> <script> var $controller_name = 'single_work'; var $action_name = "show"; var $rails_env = 'production'; var $app_rev = '49879c2402910372f4abc62630a427bbe033d190'; var $domain = 'academia.edu'; var $app_host = "academia.edu"; var $asset_host = "academia-assets.com"; var $start_time = new Date().getTime(); var $recaptcha_key = "6LdxlRMTAAAAADnu_zyLhLg0YF9uACwz78shpjJB"; var $recaptcha_invisible_key = "6Lf3KHUUAAAAACggoMpmGJdQDtiyrjVlvGJ6BbAj"; var $disableClientRecordHit = false; </script> <script> window.require = { config: function() { return function() {} } } </script> <script> window.Aedu = window.Aedu || {}; window.Aedu.hit_data = null; window.Aedu.serverRenderTime = new Date(1732416628000); window.Aedu.timeDifference = new Date().getTime() - 1732416628000; </script> <script type="application/ld+json">{"@context":"https://schema.org","@type":"ScholarlyArticle","abstract":"Meromictic Lake Cadagno, an ancient ocean analogue, is known for its permanent stratification and persistent anoxygenic microbial bloom within the chemocline. Although the anaerobic microbial ecology of the lake has been extensively studied for at least 25 years, a comprehensive picture of the microbial food web linking the bacterial layer to phytoplankton and viruses, with explicit measures of primary and secondary production, is still missing. This study sought to understand better the abundances and productivity of microbes in the context of nutrient biogeochemical cycling across the stratified zones of Lake Cadagno. Photosynthetic pigments and chloroplast 16S rRNA gene phylogenies suggested the presence of eukaryotic phytoplankton through the water column. Evidence supported high abundances of Ankyra judayi, a high-alpine adapted chlorophyte, in the oxic mixolimnion where oxygenic-primary production peaked. Through the low- and no-oxygen chemocline and monimolimnion, chlorophyte...","author":[{"@context":"https://schema.org","@type":"Person","name":"JASPREET SAINI"}],"contributor":[],"dateCreated":"2022-11-14","dateModified":null,"datePublished":"2021-01-01","headline":"Microbial loop of a Proterozoic ocean analogue","inLanguage":"en","keywords":["Biology","Ecology","Phytoplankton","Microbial Mat"],"locationCreated":null,"publication":null,"publisher":{"@context":"https://schema.org","@type":"Organization","name":"Cold Spring Harbor Laboratory"},"image":null,"thumbnailUrl":null,"url":"https://www.academia.edu/90746907/Microbial_loop_of_a_Proterozoic_ocean_analogue","sourceOrganization":[{"@context":"https://schema.org","@type":"EducationalOrganization","name":null}]}</script><link rel="stylesheet" media="all" href="//a.academia-assets.com/assets/single_work_page/loswp-352e32ba4e89304dc0b4fa5b3952eef2198174c54cdb79066bc62e91c68a1a91.css" /><link rel="stylesheet" media="all" 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Although the anaerobic microbial ecology of the lake has been extensively studied for at least 25 years, a comprehensive picture of the microbial food web linking the bacterial layer to phytoplankton and viruses, with explicit measures of primary and secondary production, is still missing. This study sought to understand better the abundances and productivity of microbes in the context of nutrient biogeochemical cycling across the stratified zones of Lake Cadagno. Photosynthetic pigments and chloroplast 16S rRNA gene phylogenies suggested the presence of eukaryotic phytoplankton through the water column. Evidence supported high abundances of Ankyra judayi, a high-alpine adapted chlorophyte, in the oxic mixolimnion where oxygenic-primary production peaked. Through the low- and no-oxygen chemocline and monimolimnion, chlorophyte...","publisher":"Cold Spring Harbor Laboratory","publication_date":"2021,,"},"document_type":"paper","pre_hit_view_count_baseline":null,"quality":"high","language":"en","title":"Microbial loop of a Proterozoic ocean analogue","broadcastable":true,"draft":null,"has_indexable_attachment":true,"indexable":true}}["work"]; window.loswp.workCoauthors = [118421600]; window.loswp.locale = "en"; window.loswp.countryCode = "SG"; window.loswp.cwvAbTestBucket = ""; window.loswp.designVariant = "ds_vanilla"; window.loswp.fullPageMobileSutdModalVariant = "full_page_mobile_sutd_modal"; window.loswp.useOptimizedScribd4genScript = false; window.loswp.appleClientId = 'edu.academia.applesignon';</script><script defer="" src="https://accounts.google.com/gsi/client"></script><div class="ds-loswp-container"><div class="ds-work-card--grid-container"><div class="ds-work-card--container js-loswp-work-card"><div class="ds-work-card--cover"><div class="ds-work-cover--wrapper"><div class="ds-work-cover--container"><button class="ds-work-cover--clickable js-swp-download-button" data-signup-modal="{&quot;location&quot;:&quot;swp-splash-paper-cover&quot;,&quot;attachmentId&quot;:94224443,&quot;attachmentType&quot;:&quot;pdf&quot;}"><img alt="First page of “Microbial loop of a Proterozoic ocean analogue”" class="ds-work-cover--cover-thumbnail" src="https://0.academia-photos.com/attachment_thumbnails/94224443/mini_magick20221114-1-kc87di.png?1668434105" /><img alt="PDF Icon" class="ds-work-cover--file-icon" src="//a.academia-assets.com/assets/single_work_splash/adobe.icon-574afd46eb6b03a77a153a647fb47e30546f9215c0ee6a25df597a779717f9ef.svg" /><div class="ds-work-cover--hover-container"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span><p>Download Free PDF</p></div><div class="ds-work-cover--ribbon-container">Download Free PDF</div><div class="ds-work-cover--ribbon-triangle"></div></button></div></div></div><div class="ds-work-card--work-information"><h1 class="ds-work-card--work-title">Microbial loop of a Proterozoic ocean analogue</h1><div class="ds-work-card--work-authors ds-work-card--detail"><a class="ds-work-card--author js-wsj-grid-card-author ds2-5-body-md ds2-5-body-link" data-author-id="118421600" href="https://independent.academia.edu/JASPREETSAINI17"><img alt="Profile image of JASPREET SAINI" class="ds-work-card--author-avatar" src="//a.academia-assets.com/images/s65_no_pic.png" />JASPREET SAINI</a></div><p class="ds-work-card--detail ds2-5-body-sm">2021</p><p class="ds-work-card--work-abstract ds-work-card--detail ds2-5-body-md">Meromictic Lake Cadagno, an ancient ocean analogue, is known for its permanent stratification and persistent anoxygenic microbial bloom within the chemocline. Although the anaerobic microbial ecology of the lake has been extensively studied for at least 25 years, a comprehensive picture of the microbial food web linking the bacterial layer to phytoplankton and viruses, with explicit measures of primary and secondary production, is still missing. This study sought to understand better the abundances and productivity of microbes in the context of nutrient biogeochemical cycling across the stratified zones of Lake Cadagno. Photosynthetic pigments and chloroplast 16S rRNA gene phylogenies suggested the presence of eukaryotic phytoplankton through the water column. Evidence supported high abundances of Ankyra judayi, a high-alpine adapted chlorophyte, in the oxic mixolimnion where oxygenic-primary production peaked. Through the low- and no-oxygen chemocline and monimolimnion, chlorophyte...</p><div class="ds-work-card--button-container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{&quot;location&quot;:&quot;continue-reading-button--work-card&quot;,&quot;attachmentId&quot;:94224443,&quot;attachmentType&quot;:&quot;pdf&quot;,&quot;workUrl&quot;:&quot;https://www.academia.edu/90746907/Microbial_loop_of_a_Proterozoic_ocean_analogue&quot;}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{&quot;location&quot;:&quot;download-pdf-button--work-card&quot;,&quot;attachmentId&quot;:94224443,&quot;attachmentType&quot;:&quot;pdf&quot;,&quot;workUrl&quot;:&quot;https://www.academia.edu/90746907/Microbial_loop_of_a_Proterozoic_ocean_analogue&quot;}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div></div></div></div><div data-auto_select="false" data-client_id="331998490334-rsn3chp12mbkiqhl6e7lu2q0mlbu0f1b" data-doc_id="94224443" data-landing_url="https://www.academia.edu/90746907/Microbial_loop_of_a_Proterozoic_ocean_analogue" data-login_uri="https://www.academia.edu/registrations/google_one_tap" data-moment_callback="onGoogleOneTapEvent" id="g_id_onload"></div><div class="ds-top-related-works--grid-container"><div class="ds-related-content--container ds-top-related-works--container"><h2 class="ds-related-content--heading">Related papers</h2><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="0" data-entity-id="90746917" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/90746917/Bacterial_phytoplankton_and_viral_dynamics_of_meromictic_Lake_Cadagno_offer_insights_into_the_Proterozoic_ocean_microbial_loop">Bacterial, phytoplankton, and viral dynamics of meromictic Lake Cadagno offer insights into the Proterozoic ocean microbial loop</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="118421600" href="https://independent.academia.edu/JASPREETSAINI17">JASPREET SAINI</a></div><p class="ds-related-work--metadata ds2-5-body-xs">2021</p><p class="ds-related-work--abstract ds2-5-body-sm">ABSTRACTLake Cadagno, a permanently stratified high-alpine lake with a persistent microbial bloom in its anoxic chemocline, has long been considered a model for the low-oxygen, high-sulfide Proterozoic ocean where early microbial life gave rise to Earth’s oxygenated atmosphere. Although the lake has been studied for over 25 years, the absence of concerted study of the bacteria, phytoplankton, and viruses, together with primary and secondary production, has hindered a comprehensive understanding of its microbial food web. Here, the identities, abundances, and productivity of microbes were evaluated in the context of Lake Cadagno biogeochemistry. Photo-synthetic pigments and chloroplast 16S rRNA gene phylogenies suggested high abundances of eukaryotic phytoplankton, primarily Chlorophyta, through the water column. Of these, a close relative of Ankyra judayi, a high-alpine adapted chlorophyte, peaked with oxygen in the mixolimnion, while Closteriopsis-related chlorophytes peaked in the...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{&quot;location&quot;:&quot;wsj-grid-card-download-pdf-modal&quot;,&quot;work_title&quot;:&quot;Bacterial, phytoplankton, and viral dynamics of meromictic Lake Cadagno offer insights into the Proterozoic ocean microbial loop&quot;,&quot;attachmentId&quot;:94224465,&quot;attachmentType&quot;:&quot;pdf&quot;,&quot;work_url&quot;:&quot;https://www.academia.edu/90746917/Bacterial_phytoplankton_and_viral_dynamics_of_meromictic_Lake_Cadagno_offer_insights_into_the_Proterozoic_ocean_microbial_loop&quot;,&quot;alternativeTracking&quot;:true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/90746917/Bacterial_phytoplankton_and_viral_dynamics_of_meromictic_Lake_Cadagno_offer_insights_into_the_Proterozoic_ocean_microbial_loop"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="1" data-entity-id="13945195" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/13945195/Phylogenetic_diversity_of_the_bacterial_community_from_the_anoxic_layer_of_the_meromictic_Lake_Cadagno">Phylogenetic diversity of the bacterial community from the anoxic layer of the meromictic Lake Cadagno</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="33001455" href="https://supsi.academia.edu/MauroTonolla">Mauro Tonolla</a></div><p class="ds-related-work--metadata ds2-5-body-xs">2000</p><p class="ds-related-work--abstract ds2-5-body-sm">To study the population&amp;#39;s composition of the bacterioplankton observed in the monimo- limnion of the Lake Cadagno, we isolated the genes encoding the small subunit ribosomal RNA from a water sample taken at 17 meters depth, using PCR universal primers for the do- main Bacteria. After cloning in a plasmid vector, 276 clones containing the 1.4 kb full-length insert were</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{&quot;location&quot;:&quot;wsj-grid-card-download-pdf-modal&quot;,&quot;work_title&quot;:&quot;Phylogenetic diversity of the bacterial community from the anoxic layer of the meromictic Lake Cadagno&quot;,&quot;attachmentId&quot;:44778892,&quot;attachmentType&quot;:&quot;pdf&quot;,&quot;work_url&quot;:&quot;https://www.academia.edu/13945195/Phylogenetic_diversity_of_the_bacterial_community_from_the_anoxic_layer_of_the_meromictic_Lake_Cadagno&quot;,&quot;alternativeTracking&quot;:true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/13945195/Phylogenetic_diversity_of_the_bacterial_community_from_the_anoxic_layer_of_the_meromictic_Lake_Cadagno"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="2" data-entity-id="19544631" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/19544631/An_oligarchic_microbial_assemblage_in_the_anoxic_bottom_waters_of_a_volcanic_subglacial_lake">An oligarchic microbial assemblage in the anoxic bottom waters of a volcanic subglacial lake</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="35251569" href="https://independent.academia.edu/marklskidmore">Mark Skidmore</a></div><p class="ds-related-work--metadata ds2-5-body-xs">The ISME Journal, 2009</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{&quot;location&quot;:&quot;wsj-grid-card-download-pdf-modal&quot;,&quot;work_title&quot;:&quot;An oligarchic microbial assemblage in the anoxic bottom waters of a volcanic subglacial lake&quot;,&quot;attachmentId&quot;:40687459,&quot;attachmentType&quot;:&quot;pdf&quot;,&quot;work_url&quot;:&quot;https://www.academia.edu/19544631/An_oligarchic_microbial_assemblage_in_the_anoxic_bottom_waters_of_a_volcanic_subglacial_lake&quot;,&quot;alternativeTracking&quot;:true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/19544631/An_oligarchic_microbial_assemblage_in_the_anoxic_bottom_waters_of_a_volcanic_subglacial_lake"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="3" data-entity-id="371984" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/371984/Primary_Producing_Prokaryotic_Communities_of_Brine_Interface_and_Seawater_Above_the_Halocline_of_Deep_Anoxic_Lake_LAtalante_Eastern_Mediterranean_Sea">Primary Producing Prokaryotic Communities of Brine, Interface and Seawater Above the Halocline of Deep Anoxic Lake L&#39;Atalante, Eastern Mediterranean Sea</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="150556" href="https://gva.academia.edu/GiuseppeDAuria">Giuseppe D&#39;Auria</a></div><p class="ds-related-work--metadata ds2-5-body-xs">The ISME …, 2007</p><p class="ds-related-work--abstract ds2-5-body-sm">Meso- and bathypelagic ecosystems represent the most common marine ecological niche on Earth and contain complex communities of microorganisms that are for the most part ecophysiologically poorly characterized. Gradients of physico-chemical factors (for example, depth-related gradients of light, temperature, salinity, nutrients and pressure) constitute major forces shaping ecosystems at activity &#39;hot spots&#39; on the ocean floor, such as hydrothermal vents, cold seepages and mud volcanoes and hypersaline lakes, though the relationships between community composition, activities and environmental parameters remain largely elusive. We report here results of a detailed study of primary producing microbial communities in the deep Eastern Mediterranean Sea. The brine column of the deep anoxic hypersaline brine lake, L&#39;Atalante, the overlying water column and the brine-seawater interface, were characterized physico- and geochemically, and microbiologically, in terms of their microbial community compositions, functional gene distributions and [(14)C]bicarbonate assimilation activities. The depth distribution of genes encoding the crenarchaeal ammonia monooxygenase alpha subunit (amoA), and the bacterial ribulose-1,5-biphosphate carboxylase/oxygenase large subunit (RuBisCO), was found to coincide with two different types of chemoautotrophy. Meso- and bathypelagic microbial communities were enriched in ammonia-oxidizing Crenarchaeota, whereas the autotrophic community at the oxic/anoxic interface of L&#39;Atalante lake was dominated by Epsilonproteobacteria and sulfur-oxidizing Gammaproteobacteria. These autotrophic microbes are thus the basis of the food webs populating these deep-sea ecosystems.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{&quot;location&quot;:&quot;wsj-grid-card-download-pdf-modal&quot;,&quot;work_title&quot;:&quot;Primary Producing Prokaryotic Communities of Brine, Interface and Seawater Above the Halocline of Deep Anoxic Lake L&#39;Atalante, Eastern Mediterranean Sea&quot;,&quot;attachmentId&quot;:51435346,&quot;attachmentType&quot;:&quot;pdf&quot;,&quot;work_url&quot;:&quot;https://www.academia.edu/371984/Primary_Producing_Prokaryotic_Communities_of_Brine_Interface_and_Seawater_Above_the_Halocline_of_Deep_Anoxic_Lake_LAtalante_Eastern_Mediterranean_Sea&quot;,&quot;alternativeTracking&quot;:true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/371984/Primary_Producing_Prokaryotic_Communities_of_Brine_Interface_and_Seawater_Above_the_Halocline_of_Deep_Anoxic_Lake_LAtalante_Eastern_Mediterranean_Sea"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="4" data-entity-id="52408423" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/52408423/Spatio_temporal_study_of_microbiology_in_the_stratified_oxic_hypoxic_euxinic_freshwater_to_hypersaline_Ursu_Lake">Spatio‐temporal study of microbiology in the stratified oxic‐hypoxic‐euxinic, freshwater‐to‐hypersaline Ursu Lake</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author 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