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Carbon fixation in sediments of Sino-Pacific seas -differential contributions of bacterial and archaeal domains
Das, Anindita1,3,4; Cao, Wenrui1; Zhang, Hongjie2; Saren, Gaowa1; Jiang, Mingyu1; Yu, Xinke1
2017-11-01
发表期刊JOURNAL OF MARINE SYSTEMS
卷号175页码:15-23
文章类型Article
摘要Oceanic stretches experiencing perpetual darkness and extreme limitation of utilizable organic matter often rely on chemosynthetic carbon (C)-fixation. However, C-fixation is not limited to carbon-deplete environments alone but might also occur in varying degrees in carbon-replete locales depending on the nature and concentration of utilizable carbon, electron donors and acceptors. Quantification of microbial C-fixation and relative contribution of domains bacteria and archaea are therefore crucial. The present experiment estimates the differential rates of C-fixation by archaea and bacteria along with the effects of different electron donors. Four Sino-Pacific marine sediments from Bashi strait (Western Pacific Warm Pool), East China Sea, South China Sea and Okinawa Trough were examined. Total microbial C-uptake was estimated by doping of aqueous (NaHCO3)-C-14. Total bacterial C-uptake was measured by blocking archaeal metabolism using inhibitor GC7. Archaeal contribution was estimated by subtracting total bacterial from total microbial C-uptake. Effect of electron donor addition was analyzed by spiking with ammonium, sulfide, and reduced metals. Results suggested that C-fixation in marine sediments was not the function of archaea alone, which was in contrast to results from several recent publications. C-fixing bacteria are also equally active. Often in spite of great effort of one domain to fix carbon, the system does not become net C-fixing due to equal and opposite C-releasing activity of the other domain. Thus a C-releasing bacterial or archaeal community can become C-fixing with the change of nature and concentration of electron donors. (C) 2017 Elsevier B.V. All rights reserved.
关键词Carbon-fixation Chemosynthesis Archaea Marine Sediments Sino-pacific
DOI10.1016/j.jmarsys.2017.06.005
收录类别SCI
语种英语
WOS记录号WOS:000411420700002
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文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/143220
专题海洋地质与环境重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Inst Biophys, 15 Datun Rd, Beijing 100101, Peoples R China
3.CSIR, Natl Inst Oceanog, Panaji 403004, Goa, India
4.MACS Agharkar Res Inst, GG Agarkar Rd, Pune 411004, Maharashtra, India
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Das, Anindita,Cao, Wenrui,Zhang, Hongjie,et al. Carbon fixation in sediments of Sino-Pacific seas -differential contributions of bacterial and archaeal domains[J]. JOURNAL OF MARINE SYSTEMS,2017,175:15-23.
APA Das, Anindita,Cao, Wenrui,Zhang, Hongjie,Saren, Gaowa,Jiang, Mingyu,&Yu, Xinke.(2017).Carbon fixation in sediments of Sino-Pacific seas -differential contributions of bacterial and archaeal domains.JOURNAL OF MARINE SYSTEMS,175,15-23.
MLA Das, Anindita,et al."Carbon fixation in sediments of Sino-Pacific seas -differential contributions of bacterial and archaeal domains".JOURNAL OF MARINE SYSTEMS 175(2017):15-23.
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