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| Redou, Vanessa; Ciobanu, Maria Cristina; Pachiadaki, Maria G.; Edgcomb, Virginia; Alain, Karine; Barbier, Georges; Burgaud, Gaetan. |
| The deep subseafloor, extending from a few centimeters below the sediment surface to several hundred meters into sedimentary deposits, constitutes the deep biosphere and harbors an unexpected microbial diversity. Several studies have described the occurrence, turnover, activity and function of subseafloor prokaryotes; however, subsurface eukaryotic communities still remain largely underexplored. Ribosomal RNA surveys of superficial and near-surface marine sediments have revealed an unexpected diversity of active eukaryotic communities, but knowledge of the diversity of deep subseafloor microeukaryotes is still scarce. Here, we investigated the vertical distribution of DNA and RNA fungal signatures within subseafloor sediments of the Canterbury basin (New... |
| Tipo: Text |
Palavras-chave: 454 pyrotag; Canterbury basin; Deep subseafloor; Fungi; Microeukaryotes. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00247/35810/34418.pdf |
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| Ciobanu, Maria Cristina; Burgaud, Gaetan; Dufresne, Alexis; Breuker, Anja; Redou, Vanessa; Ben Maamar, Sarah; Gaboyer, Frederic; Vandenabeele-trambouze, Odile; Lipp, Julius Sebastian; Schippers, Axel; Vandenkoornhuyse, Philippe; Barbier, Georges; Jebbar, Mohamed; Godfroy, Anne; Alain, Karine. |
| The subsurface realm is colonized by microbial communities to depths of >1000 meters below the seafloor (m.b.sf.), but little is known about overall diversity and microbial distribution patterns at the most profound depths. Here we show that not only Bacteria and Archaea but also Eukarya occur at record depths in the subseafloor of the Canterbury Basin. Shifts in microbial community composition along a core of nearly 2 km reflect vertical taxa zonation influenced by sediment depth. Representatives of some microbial taxa were also cultivated using methods mimicking in situ conditions. These results suggest that diverse microorganisms persist down to 1922 m.b.sf. in the seafloor of the Canterbury Basin and extend the previously known depth limits of... |
| Tipo: Text |
Palavras-chave: Deep biosphere; Subsurface life; Eukaryote; Record depth. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00201/31243/29895.pdf |
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