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Home > Featured Articles > Primary productivity below the seafloor at deep-sea hot springs > Primary productivity below the seafloor at deep-sea hot springs

Primary productivity below the seafloor at deep-sea hot springs [1]

The 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.

Original Source [2]

Publication Date: 
11/06/2018
Jesse McNichol [3], Hryhoriy Stryhanyuk [4], Sean P. Sylva & et al [5]
Proceedings of the National Academy of Sciences [6]
1-6
Tags:
Marine Ecosystems [7], Micro Organisms [8], Oceans and Seas [9]
Centre for Science and Environment
National Knowledge Commission Government of India

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Source URL: http://admin.indiaenvironmentportal.org.in/feature-article/primary-productivity-below-seafloor-deep-sea-hot-springs

Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/primary-productivity-below-seafloor-deep-sea-hot-springs
[2] http://www.pnas.org/content/pnas/early/2018/06/05/1804351115.full.pdf
[3] http://admin.indiaenvironmentportal.org.in/category/author/jesse-mcnichol
[4] http://admin.indiaenvironmentportal.org.in/category/author/hryhoriy-stryhanyuk
[5] http://admin.indiaenvironmentportal.org.in/category/author/sean-p-sylva-et-al
[6] http://admin.indiaenvironmentportal.org.in/category/journal/proceedings-national-academy-sciences
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-ecosystems
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/micro-organisms
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oceans-and-seas