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题名: Cause and effect of N/P ratio decline with eutrophication aggravation in shallow lakes
作者: Zhang, Yao1; Song, Chunlei2; Ji, Lei3; Liu, Yuqian4; Xiao, Jian2, 5; Cao, Xiuyun2; Zhou, Yiyong2
关键词: N/P ratio ; Denitrification ; Phosphorus release ; Eutrophication ; Lake
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
发表日期: 2018-06-15
DOI: 10.1016/j.scitotenv.2018.01.327
卷: 627, 页:1294-1302
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: To explore the relationship and cause and effect between eutrophication and the nitrogen (N)/phosphorus (P) ratio, samples from 38 lakes in Wuhan City, China, with differing degrees of eutrophication, were collected for nutrient levels and extracellular enzyme activities (EEA) in the water column from July 2011 to November 2011. The phosphorus fraction, abundance and potential denitrification rate (PDR) as well as community composition of nirS-type denitrifier in sediments of five typical lakes were further analyzed. A higher trophic level index (TSI) corresponded to a lower N/P ratio, which can be attributed to a loss of N and an increase in P. Specifically, in more eutrophic lakes, the enrichment of total organic carbon and all forms of P in sediments could fuel PDR by shaping community composition and increasing the abundance of nirS-type denitrifier as evidenced by correlation and redundancy analysis, ultimately resulting in a loss of N. Meanwhile, iron-bound phosphorus release induced by anoxia and the hydrolysis of organic P accounted for the observed increase of P in the water column. The lower N/P ratio facilitated the production of leucine aminopeptidase, which was unexpectedly induced by high P but not by low N. Similarly, alkaline phosphatase was induced by high N but not by low P. These findings indicate a mutual coupling and interplay between N and P cycling and confirm our hypothesis that P accumulation accelerates N loss in the process of eutrophication. (C) 2018 Elsevier B.V. All rights reserved.
关键词[WOS]: NITRITE REDUCTASE GENES ; NUTRIENT LIMITATION ; SEDIMENT PHOSPHATE ; ORGANIC-CARBON ; NITROGEN ; PHOSPHORUS ; DENITRIFICATION ; BACTERIA ; RELEASE ; WATER
语种: 英语
项目资助者: National Key Research & Development Programof China(2016YFE0202100) ; National Natural Science Foundation of China(41230748 ; Major Science and Technology Program for Water Pollution Control and Treatment(2017ZX07603) ; State Key Laboratory of Freshwater Ecology and Biotechnology(2016FBZ07) ; Anhui Provincial Natural Science Foundation(1708085QC71) ; key projects of Anhui province university of outstanding youth talent support program(GXGNFX2018010) ; Foundation for Innovative Research Team of Hubei University of Medicine(FDFR201602) ; Faculty Development Grant from Hubei University of Medicine(2016QDJZR16) ; 41573110 ; 41706136 ; 81372998)
WOS记录号: WOS:000431848500122
ISSN号: 0048-9697
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/50883
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Hubei Univ Med, Sch Publ Hlth & Management, Ctr Environm & Hlth Water Source Area South North, Shiyan 442000, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Key Lab Algal Biol, 7 Donghu South Rd, Wuhan 430072, Hubei, Peoples R China
3.Huaibei Normal Univ, Coll Life Sci, Huaibei 235000, Peoples R China
4.Yellow River Water Resources Protect Inst, Zhengzhou 450004, Henan, Peoples R China
5.Univ Chinese Acad Sci, Beijing W0039, Peoples R China
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