Microbial sulfate reduction and organic sulfur formation in sinking marine particles | Zendy

M. R. Raven | Zendy; Richard G. Keil | Zendy; Samuel M. Webb | Zendy

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Microbial sulfate reduction and organic sulfur formation in sinking marine particles

Author(s) -

M. R. Raven,

Richard G. Keil,

Samuel M. Webb

Publication year - 2021

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.abc6035

Subject(s) - sulfur , sulfate , environmental chemistry , total organic carbon , carbon fibers , environmental science , carbon cycle , dissolved organic carbon , sulfur cycle , oxygen , chemistry , oceanography , ecology , geology , biology , ecosystem , materials science , organic chemistry , composite number , composite material

Where they can't breathe Climate warming is causing the expansion of marine oxygen-deficient zones, which are regions in which dissolved oxygen concentrations are so low that many marine animals cannot survive. This phenomenon also might affect the global cycles of carbon, sulfur, nitrogen, and trace metals in the oceans. Ravenet al. show how ocean anoxia affects microbial sulfur processing in sinking marine particles. They observed cryptic microbial sulfate reduction, which forms organic sulfur that is resistant to acid hydrolysis, a process that could enhance carbon preservation in sediments underlying oxygen-deficient water columns. This may help explain some of the more extreme episodes of organic carbon preservation associated with marine anoxia in Earth's history.Science , this issue p.178

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