气候变化领域集成服务门户(CCPortal): Biological nitrogen fixation detected under Antarctic sea ice

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DOI	10.1038/s41561-020-00651-7
	Biological nitrogen fixation detected under Antarctic sea ice
	Shiozaki T.; Fujiwara A.; Inomura K.; Hirose Y.; Hashihama F.; Harada N.
发表日期	2020
ISSN	17520894
起始页码	729
结束页码	732
卷号	13 期号:11
英文摘要	Nitrogen fixation is the primary source of reactive nitrogen in the ocean. Most ecological models do not predict nitrogen fixation in the Antarctic Ocean because of the low availability of iron and high abundance of nitrogen. Here we extensively examined nitrogen fixation in the Antarctic Ocean, and found substantial nitrogen fixation (maximum: 44.4 nmol N l−1 d−1) near the Antarctic coast, especially around ice-covered regions. The nitrogenase gene (nifH) was detected at all coastal stations, including stations where no nitrogen fixation was found. At the stations where nitrogen fixation was detected, the nitrogen-fixing cyanobacterium UCYN-A (Candidatus ‘Atelocyanobacterium thalassa’) dominated nifH gene expression, and the nifH sequence was identical to that of the major oligotype in tropical and subtropical oceans. Our results suggest that marine nitrogen fixation is a ubiquitous process in the global ocean, and that UCYN-A is the keystone species for making it possible. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	biological analysis; cyanobacterium; detection method; ecological modeling; gene expression; global ocean; keystone species; nitrogen fixation; sea ice; Southern Ocean
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206832
作者单位	Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan; Earth Surface System Research Center, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan; Institute of Arctic Climate and Environment Research, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan; School of Oceanography, University of Washington, Seattle, WA, United States; Department of Applied Chemistry and Life Science, Toyohashi University of Technology, Toyohashi, Japan; Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Minato-ku, Tokyo, Japan
推荐引用方式 GB/T 7714	Shiozaki T.,Fujiwara A.,Inomura K.,et al. Biological nitrogen fixation detected under Antarctic sea ice[J],2020,13(11).
APA	Shiozaki T.,Fujiwara A.,Inomura K.,Hirose Y.,Hashihama F.,&Harada N..(2020).Biological nitrogen fixation detected under Antarctic sea ice.Nature Geoscience,13(11).
MLA	Shiozaki T.,et al."Biological nitrogen fixation detected under Antarctic sea ice".Nature Geoscience 13.11(2020).