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题名: Diatom taxa and assemblages for establishing nutrient criteria of lakes with anthropogenic hydrologic alteration
作者: Zhang, Yali1, 2; Huo, Shouliang2; Li, Renhui3; Xi, Beidou2; Li, Hua3; He, Zhuoshi2; Pang, Chengfang4
关键词: Phosphorus ; Nitrogen ; Diatoms ; Nutrient criteria ; Hydrological connectivity
刊名: ECOLOGICAL INDICATORS
发表日期: 2016-08-01
DOI: 10.1016/j.ecolind.2016.02.048
卷: 67, 页:166-173
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Biodiversity Conservation ; Environmental Sciences
研究领域[WOS]: Biodiversity & Conservation ; Environmental Sciences & Ecology
英文摘要: Stressor-response models offer guidance for concentration-based nutrient criteria in lakes under human intervention. Diatom-based statistics from biological responses were incorporated to derive taxon-specific and community-level change points (thresholds) of phosphorous and nitrogen in 77 Yangtze floodplain lakes. Diatom metrics relating with conductivity were adopted as response variables, since conductivity explained the maximum variation (38.1%) in diatom assemblages via Bootstrapped regression trees. Nonparametric change-point analysis and Threshold Indicator Taxa ANalysis showed threshold responses of diatom community structure at 0.05-0.08 mg TP/L in connected lakes and 0.02-0.04 mgTP/L in isolated lakes. Distinct community change points of sensitive diatoms occurred at 0.96-1.63 mgTN/L in connected lakes and 0.52-0.63 mgTN/L in isolated lakes. Diatom community structures of tolerant taxa were substantially altered beyond 0.22-0.23 mg/L in connected lakes and 0.52-0.69 mg NOx/L in isolated lakes. Hydrological river-lake connectivity differed significantly in ecological nutrient criteria with more TN/TP criteria and less NOx criteria in connected lakes. Given the ecological significance and biological integrity, diatom-based statistics can provide more reliable change points (thresholds) for nutrient criteria than Chl alpha-nutrient relationships. (C) 2016 Elsevier Ltd. All rights reserved.
关键词[WOS]: ECOLOGICAL COMMUNITY THRESHOLDS ; WATER-QUALITY ; ENVIRONMENTAL GRADIENTS ; ALGAL METRICS ; UNITED-STATES ; AQUATIC LIFE ; OXBOW LAKES ; STREAMS ; EUTROPHICATION ; CONNECTIVITY
语种: 英语
项目资助者: Major Science and Technology Program for Water Pollution Control and Treatment(2012ZX07101) ; National Natural Science Foundation of China(41303085)
WOS记录号: WOS:000388785300017
ISSN号: 1470-160X
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/28744
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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作者单位: 1.Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China
2.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China
3.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430071, Hubei, Peoples R China
4.Ca Foscari Univ Venice, Dept Environm Sci Informat & Stat, Venice, Italy
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