Lipid biomarker patterns of phosphogenic sediments from upwelling regions

被引：63

作者：

Arning, Esther T. ^{[2
]}

Birgel, Daniel ^{[2
]}

Schulz-Vogt, Heide N. ^{[1
]}

Holmkvist, Lars ^{[1
]}

Jorgensen, Bo Barker ^{[1
]}

Larson, Alyssa ^{[3
]}

Peckmann, Joern ^{[2
]}

机构：

[1] Max Planck Inst Marine Mikrobiol, D-28359 Bremen, Germany

[2] Univ Bremen, DFG Forschungszentrum Ozeanrander, D-28334 Bremen, Germany

[3] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

来源：

GEOMICROBIOLOGY JOURNAL | 2008年 / 25卷 / 02期

关键词：

sulfate-reducing bacteria; sulfide-oxidizing bacteria; Thiomargarita; Beggiatoa; Thioploca; lipid biomarkers; phosphogenesis; sulfur cycle; Namibia; Peru; Chile;

D O I：

10.1080/01490450801934854

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Sediments of upwelling regions off Namibia, Peru, and Chile contain dense populations of large nitrate-storing sulfide-oxidizing bacteria, Thiomargarita, Beggiatoa, and Thioploca. Increased contents of monounsaturated C(16) and C(18) fatty acids have been found at all stations studied, especially when a high density of sulfide oxidizers in the sediments was observed. The distribution of lipid biomarkers attributed to sulfate reducers (10MeC(16:0) fatty acid, ai-C(15:0) fatty acid, and mono-O-alkyl glycerol ethers) compared to the distribution of sulfide oxidizers indicate a close association between these bacteria. As a consequence, the distributions of sulfate reducers in sediments of Namibia, Peru, and Chile are closely related to differences in the motility of the various sulfide oxidizers at the three study sites. Depth profiles of mono-O-alkyl glycerol ethers have been found to correlate best with the occurrence of large sulfide-oxidizing bacteria. This suggests a particularly close link between mono-O-alkyl glycerol ether-synthesizing sulfate reducers and sulfide oxidizers. The interaction between sulfide-oxidizing bacteria and sulfate-reducing bacteria reveals intense sulfur cycling and degradation of organic matter in different sediment depths.

引用

页码：69 / 82

页数：14

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