气候变化领域集成服务门户(CCPortal): Microbial sulfate reduction and organic sulfur formation in sinking marine particles

CCPortal

DOI	10.1126/science.abc6035
	Microbial sulfate reduction and organic sulfur formation in sinking marine particles
	Raven M.R.; Keil R.G.; Webb S.M.
发表日期	2021
ISSN	0036-8075
起始页码	178
结束页码	181
卷号	371 期号:6525
英文摘要	Climate change is driving an expansion of marine oxygen-deficient zones, which may alter the global cycles of carbon, sulfur, nitrogen, and trace metals. Currently, however, we lack a full mechanistic understanding of how oxygen deficiency affects organic carbon cycling and burial. Here, we show that cryptic microbial sulfate reduction occurs in sinking particles from the eastern tropical North Pacific oxygen-deficient zone and that some microbially produced sulfide reacts rapidly to form organic sulfur that is resistant to acid hydrolysis. Particle-hosted sulfurization could enhance carbon preservation in sediments underlying oxygen-deficient water columns and serve as a stabilizing feedback between expanding anoxic zones and atmospheric carbon dioxide. A similar mechanism may help explain more-extreme instances of organic carbon preservation associated with marine anoxia in Earth history. © 2021 American Association for the Advancement of Science. All rights reserved.
英文关键词	carbon dioxide; organic carbon; organosulfur derivative; oxygen; sulfate; climate change; hydrolysis; marine environment; marine sediment; microbial activity; organic compound; oxygen minimum layer; preservation; reduction; sulfate; water column; acid hydrolysis; Article; chemical modification; feedback system; marine environment; nonhuman; priority journal; sea surface waters; sulfate reducing bacterium; sulfurization; synthesis; Pacific Ocean; Pacific Ocean (North)
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245184
作者单位	Department of Earth Science, University of California Santa Barbara, Santa Barbara, CA 93106, United States; School of Oceanography, University of Washington, Seattle, WA 98195, United States; Stanford Synchrotron Radiation Lightsource, Stanford University, Menlo Park, CA 94025, United States
推荐引用方式 GB/T 7714	Raven M.R.,Keil R.G.,Webb S.M.. Microbial sulfate reduction and organic sulfur formation in sinking marine particles[J],2021,371(6525).
APA	Raven M.R.,Keil R.G.,&Webb S.M..(2021).Microbial sulfate reduction and organic sulfur formation in sinking marine particles.Science,371(6525).
MLA	Raven M.R.,et al."Microbial sulfate reduction and organic sulfur formation in sinking marine particles".Science 371.6525(2021).