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

被引：464

作者：

Canfield, Don E. ^{[1
,2
]}

Stewart, Frank J. ^{[3
,4
]}

Thamdrup, Bo ^{[1
,2
]}

De Brabandere, Loreto ^{[1
,2
]}

Dalsgaard, Tage ^{[5
]}

Delong, Edward F. ^{[3
,4
]}

Revsbech, Niels Peter ^{[6
]}

Ulloa, Osvaldo ^{[7
,8
]}

机构：

[1] Univ So Denmark, Inst Biol, DK-5230 Odense M, Denmark

[2] Univ So Denmark, Nord Ctr Earth Evolut, DK-5230 Odense M, Denmark

[3] MIT, Dept Biol Engn, Cambridge, MA 02138 USA

[4] MIT, Dept Civil & Environm Engn, Cambridge, MA 02138 USA

[5] Aarhus Univ, Natl Environm Res Inst, DK-8600 Silkeborg, Denmark

[6] Aarhus Univ, Dept Biol Sci, Microbiol Sect, DK-8000 Aarhus C, Denmark

[7] Univ Concepcion, Dept Oceanog, Concepcion, Chile

[8] Univ Concepcion, Ctr Invest Oceanog Pacifico Sur Oriental, Concepcion, Chile

来源：

SCIENCE | 2010年 / 330卷 / 6009期

基金：

新加坡国家研究基金会;

关键词：

NITRATE REDUCTION; SULFATE-REDUCTION; MOLECULAR ANALYSIS; HYDROGEN-SULFIDE; PROKARYOTES; PHYLOGENY; DIVERSITY; OXIDATION; SEDIMENTS; SYMBIONT;

D O I：

10.1126/science.1196889

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：1375 / 1378

页数：4

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