Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO2843 |
Metabolism in anoxic permeable sediments is dominated by eukaryotic dark fermentation | |
Bourke, Michael F.1; Marriott, Philip J.2; Glud, Ronnie N.3,4,5; Hasler-Sheetal, Harald3,6; Kamalanathan, Manoj7; Beardall, John8; Greening, Chris8; Cook, Perran L. M.1 | |
2017 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; Denmark; Scotland; USA |
英文摘要 | Permeable sediments are common across continental shelves and are critical contributors to marine biogeochemical cycling. Organic matter in permeable sediments is dominated by microalgae, which as eukaryotes have different anaerobic metabolic pathways to bacteria and archaea. Here we present analyses of flow-through reactor experiments showing that dissolved inorganic carbon is produced predominantly as a result of anaerobic eukaryotic metabolic activity. In our experiments, anaerobic production of dissolved inorganic carbon was consistently accompanied by large dissolved H-2 production rates, suggesting the presence of fermentation. The production of both dissolved inorganic carbon and H-2 persisted following administration of broad spectrum bactericidal antibiotics, but ceased following treatment with metronidazole. Metronidazole inhibits the ferredoxin/hydrogenase pathway of fermentative eukaryotic H-2 production, suggesting that pathway as the source of H-2 and dissolved inorganic carbon production. Metabolomic analysis showed large increases in lipid production at the onset of anoxia, consistent with documented pathways of anoxic dark fermentation in microalgae. Cell counts revealed a predominance of microalgae in the sediments. H-2 production was observed in dark anoxic cultures of diatoms (Fragilariopsis sp.) and a chlorophyte (Pyramimonas) isolated from the study site, substantiating the hypothesis that microalgae undertake fermentation. We conclude that microalgal dark fermentation could be an important energy-conserving pathway in permeable sediments. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394117300010 |
WOS关键词 | WAX ESTER FERMENTATION ; CHLAMYDOMONAS-REINHARDTII ; ADVECTIVE TRANSPORT ; COASTAL SEDIMENTS ; SULFATE REDUCTION ; EUGLENA-GRACILIS ; RISK-ASSESSMENT ; ORGANIC-CARBON ; WATER ; ANTIBIOTICS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34697 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Monash Univ, Sch Chem, Water Studies Ctr, Wellington Rd, Clayton, Vic 3800, Australia; 2.Monash Univ, Australian Ctr Res Separat Sci, Sch Chem, Wellington Rd, Clayton, Vic 3800, Australia; 3.Univ Southern Denmark, Nord Ctr Earth Evolut, DK-5230 Odense M, Denmark; 4.Scottish Assoc Marine Sci, Oban PA37 1QA, Argyll, Scotland; 5.Univ Aarhus, Arctic Res Ctr, DK-8000 Aarhus, Denmark; 6.Univ Southern Denmark, Villum Ctr Bioanalyt Sci, DK-5230 Odense M, Denmark; 7.Texas A&M Univ, Dept Marine Biol, Galveston, TX 77554 USA; 8.Monash Univ, Sch Biol Sci, Clayton, Vic 3800, Australia |
推荐引用方式 GB/T 7714 | Bourke, Michael F.,Marriott, Philip J.,Glud, Ronnie N.,et al. Metabolism in anoxic permeable sediments is dominated by eukaryotic dark fermentation[J]. NATURE GEOSCIENCE,2017,10(1). |
APA | Bourke, Michael F..,Marriott, Philip J..,Glud, Ronnie N..,Hasler-Sheetal, Harald.,Kamalanathan, Manoj.,...&Cook, Perran L. M..(2017).Metabolism in anoxic permeable sediments is dominated by eukaryotic dark fermentation.NATURE GEOSCIENCE,10(1). |
MLA | Bourke, Michael F.,et al."Metabolism in anoxic permeable sediments is dominated by eukaryotic dark fermentation".NATURE GEOSCIENCE 10.1(2017). |
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