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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
Source PublicationJOURNAL OF MARINE SYSTEMS
Volume175Pages:15-23
SubtypeArticle
AbstractOceanic 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.
KeywordCarbon-fixation Chemosynthesis Archaea Marine Sediments Sino-pacific
DOI10.1016/j.jmarsys.2017.06.005
Indexed BySCI
Language英语
WOS IDWOS:000411420700002
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/143220
Collection海洋地质与环境重点实验室
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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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