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A Cryptic Sulfur Cycle in Oxygen-Minimum-Zone Waters off the Chilean Coast

Author(s)
Canfield, D. E.; Thamdrup, B.; De Brabandere, L.; Dalsgaard, T.; Revsbech, N. P.; Ulloa, O.; Stewart, Frank J.; DeLong, Edward Francis; ... Show more Show less
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Abstract
Nitrogen cycling is normally thought to dominate the biogeochemistry and microbial ecology of oxygen-minimum zones in marine environments. Through a combination of molecular techniques and process rate measurements, we showed that both sulfate reduction and sulfide oxidation contribute to energy flux and elemental cycling in oxygen-free waters off the coast of northern Chile. These processes may have been overlooked because in nature, the sulfide produced by sulfate reduction immediately oxidizes back to sulfate. This cryptic sulfur cycle is linked to anammox and other nitrogen cycling processes, suggesting that it may influence biogeochemical cycling in the global ocean.
Date issued
2010-11
URI
http://hdl.handle.net/1721.1/108425
Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Canfield, D. E.; Stewart, F. J.; Thamdrup, B.; De Brabandere, L.; Dalsgaard, T.; Delong, E. F.; Revsbech, N. P. and Ulloa, O. “A Cryptic Sulfur Cycle in Oxygen-Minimum-Zone Waters Off the Chilean Coast.” Science 330, no. 6009 (December 2010): 1375–1378. © 2010, American Association for the Advancement of Science (AAAS)
Version: Author's final manuscript
ISSN
0036-8075
1095-9203

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