{"id":50967,"date":"2023-10-13T13:19:14","date_gmt":"2023-10-13T13:19:14","guid":{"rendered":"https:\/\/matis.is\/?p=50967"},"modified":"2023-10-13T13:19:16","modified_gmt":"2023-10-13T13:19:16","slug":"metagenomic-analyses-of-a-microbial-assemblage-in-a-subglacial-lake-beneath-the-vatnajokull-ice-cap-iceland","status":"publish","type":"post","link":"https:\/\/matis.is\/en\/greinar\/metagenomic-analyses-of-a-microbial-assemblage-in-a-subglacial-lake-beneath-the-vatnajokull-ice-cap-iceland\/","title":{"rendered":"Metagenomic analyzes of a microbial assemblage in a subglacial lake beneath the Vatnaj\u00f6kull ice cap, Iceland"},"content":{"rendered":"<p>Skaft\u00e1rkatlar are two subglacial lakes located beneath the Vatnaj\u00f6kull ice cap in Iceland associated with geothermal and volcanic activity. Previous studies of these lakes with ribosomal gene (16S rDNA) tag sequencing revealed a limited diversity of bacteria adapted to cold, dark, and nutrient-poor waters. In this study, we present analyzes of metagenomes from the lake which provide new insights into its microbial ecology. Analyzes of the 16S rDNA genes in the metagenomes confirmed the existence of a low-diversity core microbial assemblage in the lake and insights into the potential metabolisms of the dominant members. Seven taxonomic genera,\u00a0<em>Sulfuric acid<\/em>,\u00a0<em>Sulfurospirillum<\/em>,\u00a0<em>Acetobacterium<\/em>,\u00a0<em>Pelobacter\/Geobacter<\/em>,\u00a0<em>Saccharibacteria, Caldisericum<\/em>, and an unclassified member of Prolixibacteraceae, comprising more than 98% of the rDNA reads in the library. Functional characterization of the lake metagenomes revealed complete metabolic pathways for sulfur cycling, nitrogen metabolism, carbon fixation\u00a0<em>via<\/em>\u00a0the reverse Krebs cycle, and acetogenesis. These results show that chemolithoautotrophy constitutes the main metabolism in this subglacial ecosystem. This assemblage and its metabolisms are not reflected in enrichment cultures, demonstrating the importance of\u00a0<em>in situ<\/em>\u00a0investigations of this environment.<\/p>","protected":false},"excerpt":{"rendered":"<p>Skaft\u00e1rkatlar are two subglacial lakes located beneath the Vatnaj\u00f6kull ice cap in Iceland associated with geothermal and volcanic activity. Previous [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"template-greinar.php","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[2011],"tags":[],"class_list":["post-50967","post","type-post","status-publish","format-standard","hentry","category-greinar"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Metagenomic analyses of a microbial assemblage in a subglacial lake beneath the Vatnaj\u00f6kull ice cap, Iceland - Mat\u00eds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/matis.is\/en\/greinar\/metagenomic-analyses-of-a-microbial-assemblage-in-a-subglacial-lake-beneath-the-vatnajokull-ice-cap-iceland\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Metagenomic analyses of a microbial assemblage in a subglacial lake beneath the Vatnaj\u00f6kull ice cap, Iceland - Mat\u00eds\" \/>\n<meta property=\"og:description\" content=\"Skaft\u00e1rkatlar are two subglacial lakes located beneath the Vatnaj\u00f6kull ice cap in Iceland associated with geothermal and volcanic activity. 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