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BG | Articles | Volume 17, issue 1
Biogeosciences, 17, 1–12, 2020
https://doi.org/10.5194/bg-17-1-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 17, 1–12, 2020
https://doi.org/10.5194/bg-17-1-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 02 Jan 2020

Research article | 02 Jan 2020

Benthic carbon fixation and cycling in diffuse hydrothermal and background sediments in the Bransfield Strait, Antarctica

Clare Woulds et al.

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Hydrothermal activity lowers trophic diversity in Antarctic hydrothermal sediments
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Cited articles

Aquilina, A., Connelly, D. P., Copley, J. T., Green, D. R. H., Hawkes, J. A., Hepburn, L. E., Huvenne, V. A. I., Marsh, L., Mills, R. A., and Tyler, P. A.: Geochemical and Visual Indicators of Hydrothermal Fluid Flow through a Sediment-Hosted Volcanic Ridge in the Central Bransfield Basin (Antarctica), Plos One, 8, e54686, 2013. 
Aquilina, A., Homoky, W. B., Hawkes, J. A., Lyons, T. W., and Mills, R. A.: Hydrothermal sediments are a source of water column Fe and Mn in the Bransfield Strait, Antarctica, Geochim. Cosmochim. Ac., 137, 64–80, 2014. 
Bell, J. B., Aquilina, A., Woulds, C., Glover, A. G., Little, C. T. S., Reid, W. D. K., Hepburn, L. E., Newton, J., and Mills, R. A.: Geochemistry, faunal composition and trophic structure in reducing sediments on the southwest South Georgia margin, Royal Society Open Science, 3, 160284, 2016a. 
Bell, J. B., Woulds, C., Brown, L. E., Sweeting, C. J., Reid, W. D. K., Little, C. T. S., and Glover, A. G.: Macrofaunal ecology of sedimented hydrothermal vents in the Bransfield Strait, Antarctica, Frontiers in Marine Science, 3, 32, 2016b. 
Bell, J. B., Reid, W. D. K., Pearce, D. A., Glover, A. G., Sweeting, C. J., Newton, J., and Woulds, C.: Hydrothermal activity lowers trophic diversity in Antarctic hydrothermal sediments, Biogeosciences, 14, 5705–5725, https://doi.org/10.5194/bg-14-5705-2017, 2017a. 
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Sedimented hydrothermal vents occur where heated, mineral-rich (hydrothermal) water seeps through seafloor sediments. They host chemosynthetic microbes, which use chemical energy to fix dissolved carbon dioxide into sugars (chemosynthesis). We conducted carbon tracing experiments, and observed chemosynthesis at both vent and non-vent sites. Thus, chemosynthesis occurred over a much larger area than expected, suggesting it is more widespread than previously thought.
Sedimented hydrothermal vents occur where heated, mineral-rich (hydrothermal) water seeps...
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