气候变化领域集成服务门户(CCPortal): Abiotic hydrogen (H2) sources and sinks near the Mid-Ocean Ridge (MOR) with implications for the subseafloor biosphere

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DOI	10.1073/pnas.2002619117
	Abiotic hydrogen (H2) sources and sinks near the Mid-Ocean Ridge (MOR) with implications for the subseafloor biosphere
	Worman S.L.; Pratson L.F.; Karson J.A.; Schlesinger W.H.
发表日期	2020
ISSN	0027-8424
起始页码	13283
结束页码	13293
卷号	117 期号:24
英文摘要	Free hydrogen (H2) is a basal energy source underlying chemosynthetic activity within igneous ocean crust. In an attempt to systematically account for all H2 within young oceanic lithosphere (<10 Ma) near the Mid-Ocean Ridge (MOR), we construct a box model of this environment. Within this control volume, we assess abiotic H2 sources (∼6 × 1012 mol H2/y) and sinks (∼4 × 1012 mol H2/y) and then attribute the net difference (∼2 × 1012 mol H2/y) to microbial consumption in order to balance the H2 budget. Despite poorly constrained details and large uncertainties, our analytical framework allows us to synthesize a vast body of pertinent but currently disparate information in order to propose an initial global estimate for microbial H2 consumption within young ocean crust that is tractable and can be iteratively improved upon as new data and studies become available. Our preliminary investigation suggests that microbes beneath the MOR may be consuming a sizeable portion (at least ∼30%) of all produced H2, supporting the widely held notion that subseafloor microbes voraciously consume H2 and play a fundamental role in the geochemistry of Earth's ocean-atmosphere system. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Biogeochemistry; Hydrogen; Microbes; Mid-Ocean Ridge; Origins of life
语种	英语
scopus关键词	hydrogen; Article; biogenesis; biogeochemistry; biomass; biosphere; controlled study; lithosphere; microbial diversity; microorganism; mid ocean ridge; nonhuman; priority journal; sea; subseafloor
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160921
作者单位	Worman, S.L., Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, NC 27708, United States; Pratson, L.F., Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, NC 27708, United States; Karson, J.A., Department of Earth Sciences, Syracuse University, Syracuse, NY 13244, United States; Schlesinger, W.H., Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, NC 27708, United States, Cary Institute of Ecosystem Studies, Millbrook, NY 12545, United States
推荐引用方式 GB/T 7714	Worman S.L.,Pratson L.F.,Karson J.A.,et al. Abiotic hydrogen (H2) sources and sinks near the Mid-Ocean Ridge (MOR) with implications for the subseafloor biosphere[J],2020,117(24).
APA	Worman S.L.,Pratson L.F.,Karson J.A.,&Schlesinger W.H..(2020).Abiotic hydrogen (H2) sources and sinks near the Mid-Ocean Ridge (MOR) with implications for the subseafloor biosphere.Proceedings of the National Academy of Sciences of the United States of America,117(24).
MLA	Worman S.L.,et al."Abiotic hydrogen (H2) sources and sinks near the Mid-Ocean Ridge (MOR) with implications for the subseafloor biosphere".Proceedings of the National Academy of Sciences of the United States of America 117.24(2020).