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dc.contributor.authorMcNichol, Jesse C.  Concept link
dc.contributor.authorStryhanyuk, Hryhoriy  Concept link
dc.contributor.authorSylva, Sean P.  Concept link
dc.contributor.authorThomas, François  Concept link
dc.contributor.authorMusat, Niculina  Concept link
dc.contributor.authorSeewald, Jeffrey S.  Concept link
dc.contributor.authorSievert, Stefan M.  Concept link
dc.identifier.citationProceedings of the National Academy of Sciences.of the United States of America 115 (2018): 6756–6761en_US
dc.description© The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Proceedings of the National Academy of Sciences.of the United States of America 115 (2018): 6756–6761, doi:10.1073/pnas.1804351115.en_US
dc.description.abstractThe existence of a chemosynthetic subseafloor biosphere was immediately recognized when deep-sea hot springs were discovered in 1977. However, quantifying how much new carbon is fixed in this environment has remained elusive. In this study, we incubated natural subseafloor communities under in situ pressure/temperature and measured their chemosynthetic growth efficiency and metabolic rates. Combining these data with fluid flux and in situ chemical measurements, we derived empirical constraints on chemosynthetic activity in the natural environment. Our study shows subseafloor microorganisms are highly productive (up to 1.4 Tg C produced yearly), fast-growing (turning over every 17–41 hours), and physiologically diverse. These estimates place deep-sea hot springs in a quantitative framework and allow us to assess their importance for global biogeochemical cycles.en_US
dc.description.sponsorshipThis research was funded by a grant of the Dimensions of Biodiversity program of the US National Science Foundation (NSF-OCE-1136727 to S.M.S. and J.S.S.). Funding for J.M. was further provided by doctoral fellowships from the Natural Sciences and Engineering Research Council of Canada (PGSD3-430487-2013, PGSM-405117-2011) and the National Aeronautics and Space Administration Earth Systems Science Fellowship (PLANET14F-0075), an award from the Canadian Meteorological and Oceanographic Society, and the WHOI Academic Programs Office.en_US
dc.publisherNational Academy of Sciencesen_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.titlePrimary productivity below the seafloor at deep-sea hot springsen_US

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