Articles | Volume 10, issue 8
https://doi.org/10.5194/bg-10-5639-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-10-5639-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
26 Aug 2013
Research article |
| 26 Aug 2013
Saturated CO2 inhibits microbial processes in CO2-vented deep-sea sediments
D. de Beer
Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, 28359 Bremen, Germany
M. Haeckel
Geomar Helmholtz Centre for Ocean Research Kiel, Wischhofstrasse 1–3, 24148 Kiel, Germany
J. Neumann
Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, 28359 Bremen, Germany
G. Wegener
Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, 28359 Bremen, Germany
MARUM – Center for Marine Environmental Sciences, University of Bremen, 28334 Bremen, Germany
F. Inagaki
Geomicrobiology Group, Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Monobe B200, Nankoku, Kochi 783-8502, Japan
Geobio-Engineering and Technology Group, Submarine Resources Research Project, JAMSTEC, Monobe B200, Nankoku, Kochi 783-8502, Japan
A. Boetius
Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, 28359 Bremen, Germany
HGF MPG Research Group for Deep Sea Ecology and Technology, Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen, 27515 Bremerhaven, Germany
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Revised manuscript not accepted
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Over the next century the dissolved carbon dioxide gas and hydrogen ion concentrations in seawater will triple. We used a new technique that incorporates the net productivity of all organisms in a ten square meter area to examine what the future of seagrass might look like. We compared seagrass at a CO2 vent to seagrass at a conventional shore. Seagrass meadow productivity was reduced at the vent, but it is likely that contaminants in vent fluids may have been the cause.
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We studied the upper 10 m of deep-sea sediments, including pore water, in the Peru Basin to understand small-scale variability of trace metals. Our results show high spatial variability related to topographical variations, which in turn impact organic matter contents, degradation processes, and trace metal cycling. Another interesting finding was the influence of dissolving buried nodules on the surrounding sediment and trace metal cycling.
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