{"id":419,"date":"2021-10-13T13:49:18","date_gmt":"2021-10-13T13:49:18","guid":{"rendered":"https:\/\/geografie.ubbcluj.ro\/cercetare\/?p=419"},"modified":"2021-10-13T13:51:17","modified_gmt":"2021-10-13T13:51:17","slug":"spatio-temporal-insights-into-microbiology-of-the-freshwater-to-hypersaline-oxic-hypoxic-euxinic-waters-of-ursu-lake","status":"publish","type":"post","link":"https:\/\/geografie.ubbcluj.ro\/cercetare\/?p=419","title":{"rendered":"Spatio-temporal insights into microbiology of the freshwater-to-hypersaline, oxic-hypoxic-euxinic waters of Ursu Lake"},"content":{"rendered":"

Andreea Baricz<\/a>, <\/span><\/span>Cecilia Maria Chiriac<\/a>, <\/span><\/span>Adrian-\u0218tefan Andrei<\/a>, <\/span><\/span>Paul-Adrian Bulzu<\/a>, <\/span><\/span>Erika Andrea Levei<\/a>, <\/span><\/span>Oana Cadar<\/a>, <\/span><\/span>Karina Paula Battes<\/a>, <\/span><\/span>Mirela C\u00eempean<\/a>, <\/span><\/span>Marin \u0218enil\u0103<\/a>, <\/span><\/span>Adorj\u00e1n Cristea<\/a>, <\/span><\/span>Vasile Muntean<\/a>, <\/span><\/span>Mircea Alexe<\/a>, <\/span><\/span>Cristian Coman<\/a>, <\/span><\/span>Edina Kriszta Szekeres<\/a>, <\/span><\/span>Cosmin Ionel Sicora<\/a>, <\/span><\/span>Artur Ionescu<\/a>, <\/span><\/span>David Blain<\/a>, <\/span><\/span>William Kenneth O’Neill<\/a>, <\/span><\/span>Jessica Edwards<\/a>, <\/span><\/span>John Edward Hallsworth<\/i><\/a>, <\/span><\/span>Horia Leonard Banciu<\/i><\/a><\/span><\/p>\n

Environmental Microbiology (2021) 23(7), 3523\u20133540<\/p>\n

https:\/\/doi.org\/10.1111\/1462-2920.14909<\/a><\/p>\n

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\n

Summary<\/h2>\n
\n

Ursu Lake is located in the Middle Miocene salt deposit of Central Romania. It is stratified, and the water column has three distinct water masses: an upper freshwater-to-moderately saline stratum (0\u20133\u00a0m), an intermediate stratum exhibiting a steep halocline (3\u20133.5\u00a0m), and a lower hypersaline stratum (4\u00a0m and below) that is euxinic (i.e. anoxic and sulphidic). Recent studies have characterized the lake’s microbial taxonomy and given rise to intriguing ecological questions. Here, we explore whether the communities are dynamic or stable in relation to taxonomic composition, geochemistry, biophysics, and ecophysiological functions during the annual cycle. We found: (i) seasonally fluctuating, light-dependent communities in the upper layer (\u22650.987\u20130.990 water-activity), a stable but phylogenetically diverse population of heterotrophs in the hypersaline stratum (water activities down to 0.762) and a persistent plate of green sulphur bacteria that connects these two (0.958\u20130.956 water activity) at 3\u20133.5\u00a0to 4\u00a0m; (ii) communities that might be involved in carbon- and sulphur-cycling between and within the lake’s three main water masses; (iii) uncultured lineages including Acetothermia<\/i> (OP1), Cloacimonetes<\/i> (WWE1), Marinimicrobia<\/i> (SAR406), Omnitrophicaeota<\/i> (OP3), Parcubacteria<\/i> (OD1) and other Candidate Phyla Radiation bacteria,\u00a0and SR1 in the hypersaline stratum (likely involved in the anaerobic steps of carbon- and sulphur-cycling); and (iv) that species richness and habitat stability are associated with high redox-potentials. Ursu Lake has a unique and complex ecology, at the same time\u00a0exhibiting dynamic fluctuations and stability, and can be used as a modern analogue for ancient euxinic water bodies\u00a0and\u00a0comparator system for other stratified hypersaline systems.<\/p>\n<\/div>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Andreea Baricz, Cecilia Maria Chiriac, Adrian-\u0218tefan Andrei, Paul-Adrian Bulzu, Erika Andrea Levei, Oana Cadar, Karina Paula Battes, Mirela C\u00eempean, Marin \u0218enil\u0103, Adorj\u00e1n Cristea, Vasile Muntean, Mircea Alexe, Cristian Coman, Edina Kriszta Szekeres, Cosmin Ionel Sicora, Artur Ionescu, David Blain, William Kenneth O’Neill, Jessica Edwards, John Edward Hallsworth, Horia Leonard Banciu Environmental Microbiology (2021) 23(7), 3523\u20133540 […]<\/p>\n","protected":false},"author":2,"featured_media":420,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-419","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-isi"],"_links":{"self":[{"href":"https:\/\/geografie.ubbcluj.ro\/cercetare\/index.php?rest_route=\/wp\/v2\/posts\/419","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/geografie.ubbcluj.ro\/cercetare\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/geografie.ubbcluj.ro\/cercetare\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/geografie.ubbcluj.ro\/cercetare\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/geografie.ubbcluj.ro\/cercetare\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=419"}],"version-history":[{"count":3,"href":"https:\/\/geografie.ubbcluj.ro\/cercetare\/index.php?rest_route=\/wp\/v2\/posts\/419\/revisions"}],"predecessor-version":[{"id":423,"href":"https:\/\/geografie.ubbcluj.ro\/cercetare\/index.php?rest_route=\/wp\/v2\/posts\/419\/revisions\/423"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/geografie.ubbcluj.ro\/cercetare\/index.php?rest_route=\/wp\/v2\/media\/420"}],"wp:attachment":[{"href":"https:\/\/geografie.ubbcluj.ro\/cercetare\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=419"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/geografie.ubbcluj.ro\/cercetare\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=419"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/geografie.ubbcluj.ro\/cercetare\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}