气候变化领域集成服务门户(CCPortal): Nutrient stoichiometry (N:P) controls nitrogen fixation and distribution of diazotrophs in a tropical eutrophic estuary

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DOI	10.1016/j.marpolbul.2019.110799
	Nutrient stoichiometry (N:P) controls nitrogen fixation and distribution of diazotrophs in a tropical eutrophic estuary
	Jabir T.; Vipindas P.V.; Jesmi Y.; Valliyodan S.; Parambath P.M.; Singh A.; Abdulla M.H.
发表日期	2020
ISSN	0025326X
卷号	151
英文摘要	Nitrogen fixation and its ecological regulation are poorly understood in the tropical estuaries, which are highly influenced by anthropogenic disturbances. In this study, we investigated the role of nutrient stoichiometry in the diversity, abundance and activity of N2-fixing bacterial community and their seasonal variations in the water column of a tropical eutrophic estuary (Cochin estuary). The N2 fixation rates in the estuary ranged from 0.1 to 2.0 nmol N2 l−1 h−1, with higher activity during post-monsoon and lower during monsoon. The rates are appeared to be primarily controlled by dissolved inorganic nitrogen and phosphorous (N:P) ratio. Clone library analysis of nitrogenase (nifH) gene revealed that the major N2 fixing phylotypes belong to Cluster I and Cluster III diazotrophs. The overall findings of this study suggest that monsoon induced seasonal changes in nutrient stoichiometry control the distribution and activity of diazotrophs in a tropical estuary. © 2019 Elsevier Ltd
英文关键词	Cochin estuary; Diversity; Monsoon; N:P ratio; Nitrogen fixation rate
语种	英语
scopus关键词	Atmospheric thermodynamics; Estuaries; Eutrophication; Nutrients; Stoichiometry; Tropics; Anthropogenic disturbance; Bacterial community; Cochin estuaries; Dissolved inorganic nitrogens; Diversity; Monsoon; N:P ratio; Stoichiometry control; Nitrogen fixation; nitrogen; phosphorus derivative; nitrogen; estuarine environment; eutrophic environment; monsoon; nitrifying bacterium; nitrogen; nitrogen fixation; nutrient availability; phosphorus; pollution effect; stoichiometry; tropical region; Article; diazotroph; DNA extraction; estuary; eutrophication; gene; gene amplification; microbial community; monsoon climate; nitrogen fixation; nonhuman; phylogeny; physical chemistry; polymerase chain reaction; seasonal variation; stoichiometry; season; Cochin Estuary; India; Kerala; Bacteria (microorganisms); Estuaries; Nitrogen; Nitrogen Fixation; Nutrients; Seasons
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/149265
作者单位	Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, Kerala 682016, India; School of Environmental Sciences, Mahatma Gandhi University, Kottayam, Kerala 686560, India; Kerala University of Fisheries and Ocean Studies, Panangad, Kochi, Kerala 682506, India; Physical Research Laboratory, Ahmedabad, 380 009, India
推荐引用方式 GB/T 7714	Jabir T.,Vipindas P.V.,Jesmi Y.,et al. Nutrient stoichiometry (N:P) controls nitrogen fixation and distribution of diazotrophs in a tropical eutrophic estuary[J],2020,151.
APA	Jabir T..,Vipindas P.V..,Jesmi Y..,Valliyodan S..,Parambath P.M..,...&Abdulla M.H..(2020).Nutrient stoichiometry (N:P) controls nitrogen fixation and distribution of diazotrophs in a tropical eutrophic estuary.Marine Pollution Bulletin,151.
MLA	Jabir T.,et al."Nutrient stoichiometry (N:P) controls nitrogen fixation and distribution of diazotrophs in a tropical eutrophic estuary".Marine Pollution Bulletin 151(2020).