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学科主题: Science & Technology - Other Topics
题名: Potential influence of water level changes on energy flows in a lake food web
作者: Wang Yuyu1, 2; Yu XiuBo1; Li WenHua1; Xu Jun3, 4; Chen YuWei5; Fan Na1, 2
通讯作者: Yu XiuBo,Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China ; yuxb@igsnrr.ac.cn
关键词: stable isotopes ; seasonal food sources ; IsoSource model ; water level ; Poyang Lake
刊名: CHINESE SCIENCE BULLETIN
发表日期: 2011-09-01
DOI: 10.1007/s11434-011-4649-y
卷: 56, 期:26, 页:2794-2802
收录类别: SCI
文章类型: Article
部门归属: [Wang, YY; Yu, XB; Li, WH; Fan, N] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China; [Wang, YY; Fan, N] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China; [Xu, J] Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Xu, J] Lund Univ, Inst Ecol, SE-22362 Lund, Sweden; [Chen, YW] Chinese Acad Sci, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China
WOS标题词: Science & Technology
资助者: National Basic Research Program of China[2009CB421106]; National Natural Science Foundation of China[30870428]; K. C. Wong Education Foundation; Chinese Academy of Sciences
类目[WOS]: Multidisciplinary Sciences
研究领域[WOS]: Science & Technology - Other Topics
摘要: Large seasonal water-level fluctuations may influence isotopic signatures of primary producers and the types and amounts of these potential food sources accessible to aquatic fauna of Poyang Lake, the largest freshwater lake in China. In this study, the isotopic signatures of primary producers and consumers were determined, stable carbon and nitrogen isotope analysis and mixing models were combined to investigate the influence of water levels on the diet and isotopic composition of Poyang Lake fish and invertebrates. Five potential food sources (seston, benthic organic matter, aquatic macrophytes, attached algae, and terrestrial plants), 4 species of invertebrates, and 10 species of fish were collected from the lake area during dry and wet seasons between January 2009 and April 2010. The delta (13)C values of invertebrates and most fish were within the range of delta (13)C values of the potential food sources for both seasons. The delta (13)C values of invertebrates and most fish were lower in the dry season than in the wet season, whereas the delta (15)N values exhibited different patterns for different species. Mixing models indicated that the most important food sources for common lake fauna were seston in the dry season and aquatic macrophytes and terrestrial plants in the wet season. The fauna were more omnivorous in the wet season than in the dry season. The food web dynamics of Poyang Lake are strongly influenced by changes in the abundance and accessibility of different basal food sources that occur because of seasonal flood pulses. The trophic links within the aquatic communities of Poyang Lake are modified by water-level fluctuations.
英文摘要: Large seasonal water-level fluctuations may influence isotopic signatures of primary producers and the types and amounts of these potential food sources accessible to aquatic fauna of Poyang Lake, the largest freshwater lake in China. In this study, the isotopic signatures of primary producers and consumers were determined, stable carbon and nitrogen isotope analysis and mixing models were combined to investigate the influence of water levels on the diet and isotopic composition of Poyang Lake fish and invertebrates. Five potential food sources (seston, benthic organic matter, aquatic macrophytes, attached algae, and terrestrial plants), 4 species of invertebrates, and 10 species of fish were collected from the lake area during dry and wet seasons between January 2009 and April 2010. The delta (13)C values of invertebrates and most fish were within the range of delta (13)C values of the potential food sources for both seasons. The delta (13)C values of invertebrates and most fish were lower in the dry season than in the wet season, whereas the delta (15)N values exhibited different patterns for different species. Mixing models indicated that the most important food sources for common lake fauna were seston in the dry season and aquatic macrophytes and terrestrial plants in the wet season. The fauna were more omnivorous in the wet season than in the dry season. The food web dynamics of Poyang Lake are strongly influenced by changes in the abundance and accessibility of different basal food sources that occur because of seasonal flood pulses. The trophic links within the aquatic communities of Poyang Lake are modified by water-level fluctuations.
关键词[WOS]: NITROGEN ISOTOPE RATIOS ; STABLE-ISOTOPE ; FRESH-WATER ; SEASONAL-VARIATIONS ; TERRESTRIAL CARBON ; ORGANIC-MATTER ; FISH COMMUNITY ; CLIMATE-CHANGE ; YANGTZE ; PLANTS
语种: 英语
WOS记录号: WOS:000294216000005
ISSN号: 1001-6538
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/16273
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Wuhan 430072, Peoples R China
4.Lund Univ, Inst Ecol, SE-22362 Lund, Sweden
5.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China

Recommended Citation:
Wang Yuyu; Yu XiuBo; Li WenHua; Xu Jun; Chen YuWei; Fan Na.Potential influence of water level changes on energy flows in a lake food web,CHINESE SCIENCE BULLETIN,2011,56(26):2794-2802
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