{"id":38177,"date":"2013-06-04T14:48:00","date_gmt":"2013-06-04T14:48:00","guid":{"rendered":"https:\/\/matis.is\/?p=38177"},"modified":"2023-02-03T12:40:12","modified_gmt":"2023-02-03T12:40:12","slug":"a-pervasive-microbial-community-in-waters-under-the-vatnajokull-ice-cap-iceland","status":"publish","type":"post","link":"https:\/\/matis.is\/en\/greinar\/a-pervasive-microbial-community-in-waters-under-the-vatnajokull-ice-cap-iceland\/","title":{"rendered":"A pervasive microbial community in waters under the Vatnaj\u00f6kull ice cap, Iceland"},"content":{"rendered":"<p>Subglacial lakes beneath the Vatnaj\u00f6kull ice cap in Iceland host endemic communities of microorganisms adapted to cold, dark and nutrient-poor waters, but the mechanisms by which these microbes disseminate under the ice and colonize these lakes are unknown. We present new data on this subglacial microbiome generated from samples of two subglacial lakes, a subglacial flood and a lake that was formerly subglacial but now partially exposed to the atmosphere. These data include parallel 16S rRNA gene amplicon libraries constructed using novel primers that span the v3\u2013v5 and v4\u2013v6 hypervariable regions. Archaea were not detected in either subglacial lake, and the communities are dominated by only five bacterial taxa. Our paired libraries are highly concordant for the most abundant taxa, but estimates of diversity (abundance-based coverage estimator) in the v4\u2013v6 libraries are 3\u20138 times higher than in corresponding v3\u2013v5 libraries. The dominant taxa are closely related to cultivated anaerobes and microaerobes, and may occupy unique metabolic niches in a chemoautolithotrophic ecosystem. The populations of the major taxa in the subglacial lakes are indistinguishable (&gt;99% sequence identity), despite separation by 6 km and an ice divide; one taxon is ubiquitous in our Vatnaj\u00f6kull samples. We propose that the glacial bed is connected through an aquifer in the underlying permeable basalt, and these subglacial lakes are colonized from a deeper, subterranean microbiome.<\/p>\n\n\n\n<p><strong><a href=\"https:\/\/www.nature.com\/articles\/ismej201297\">Link to article<\/a><\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>Subglacial lakes beneath the Vatnaj\u00f6kull ice cap in Iceland host endemic communities of microorganisms adapted to cold, dark and nutrient-poor [&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 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