气候变化领域集成服务门户(CCPortal): Changing perspectives in marine nitrogen fixation

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DOI	10.1126/science.aay9514
	Changing perspectives in marine nitrogen fixation
	Zehr J.P.; Capone D.G.
发表日期	2020
ISSN	0036-8075
卷号	368 期号:6492
英文摘要	Nitrogen fixation, the reduction of atmospheric dinitrogen gas (N2) to ammonia, is critical for biological productivity but is difficult to study in the vast expanse of the global ocean. Decades of field studies and the infusion of molecular biological, genomic, isotopic, and geochemical modeling approaches have led to new paradigms and questions. The discovery of previously unknown N2-fixing (diazotrophic) microorganisms and unusual physiological adaptations, combined with diagnostic distributions of nutrients and their isotopes as well as measured and modeled biogeographic patterns, have revolutionized our understanding of marine N2 fixation and its role in the global nitrogen cycle. Anthropogenic upper-ocean warming, increased dissolved carbon dioxide, and acidification will affect the distribution and relative importance of specific subgroups of N2fixers in the sea; these changes have implications for foodwebs and biogeochemical cycles. © 2020 American Association for the Advancement of Science. All rights reserved.
英文关键词	carbon dioxide; oxygen; ammonia; carbon dioxide; sea water; acidification; ammonia; anthropogenic effect; atmospheric gas; biological production; carbon dioxide; denitrification; genetic analysis; geochemistry; global ocean; isotopic analysis; molecular analysis; nitrogen cycle; nitrogen fixation; physiological response; warming; acidification; biogeochemical cycle; biomass; carbon metabolism; cyanobacterium; diazotroph; food web; global change; habitat; human; marine environment; microscopy; nitrogen cycle; nitrogen fixation; nitrogen metabolism; nonhuman; nutrient; photosynthesis; phylogeny; priority journal; Review; species diversity; symbiosis; Trichodesmium; chemistry; classification; diatom; metabolism; microbiology; oxidation reduction reaction; sea; synthesis; Ammonia; Carbon Dioxide; Cyanobacteria; Diatoms; Nitrogen Fixation; Oceans and Seas; Oxidation-Reduction; Photosynthesis; Phylogeny; Seawater; Symbiosis
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/246135
作者单位	Department of Ocean Sciences, University of California, Santa Cruz, CA 95003, United States; Marine and Environmental Biology Section, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, United States
推荐引用方式 GB/T 7714	Zehr J.P.,Capone D.G.. Changing perspectives in marine nitrogen fixation[J],2020,368(6492).
APA	Zehr J.P.,&Capone D.G..(2020).Changing perspectives in marine nitrogen fixation.Science,368(6492).
MLA	Zehr J.P.,et al."Changing perspectives in marine nitrogen fixation".Science 368.6492(2020).