气候变化领域集成服务门户(CCPortal): High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy

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DOI	10.1029/2020GL089103
	High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy
	Palter J.B.; Ames E.J.; Benavides M.; Gonçalves Neto A.; Granger J.; Moisander P.H.; Watkins-Brandt K.S.; White A.E.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	The stoichiometry of physical nutrient supply may provide a constraint on the spatial distribution and rate of marine nitrogen (N2) fixation. Yet agreement between the N2 fixation rates inferred from nutrient supply and those directly measured has been lacking. The relative transport of phosphate and nitrate across the Gulf Stream suggests that 3–6 Tg N year−1 must be fixed to maintain steady nutrient stoichiometry in the North Atlantic subtropical gyre. Here we show direct measurements of N2 fixation consistent with these estimates, suggesting elevated N2 fixation in and near the Gulf Stream. At some locations across the Gulf Stream, we measured diazotroph abundances and N2 fixation rates that are 1–3 orders of magnitude greater than previously measured in the central North Atlantic subtropical gyre. In combination, rate measurements and gene abundances suggest that biogeochemical budgets can be a robust predictive tool for N2 fixation hot spots in the global ocean. ©2020. The Authors.
英文关键词	Budget control; Nutrients; Ocean currents; Stoichiometry; Tropics; Biogeochemical; Circulation control; Direct measurement; North Atlantic subtropical gyres; Nutrient supply; Orders of magnitude; Predictive tools; Rate measurements; Nitrogen fixation; biogeochemistry; gyre; microbial activity; nitrogen fixation; nutrient enrichment; phosphate; spatial distribution; stoichiometry; subtropical region; Atlantic Ocean; Atlantic Ocean (North); Gulf Stream
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169862
作者单位	Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, United States; Coastal Marine and Wetland Studies, Coastal Carolina University, Conway, SC, United States; Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France; Department of Marine Sciences, University of Connecticut, Mansfield, CT, United States; Department of Biology, University of Massachusetts Dartmouth, Dartmouth, MA, United States; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; Department of Oceanography, University of Hawai'i at Manoa, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Palter J.B.,Ames E.J.,Benavides M.,et al. High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy[J],2020,47(16).
APA	Palter J.B..,Ames E.J..,Benavides M..,Gonçalves Neto A..,Granger J..,...&White A.E..(2020).High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy.Geophysical Research Letters,47(16).
MLA	Palter J.B.,et al."High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy".Geophysical Research Letters 47.16(2020).