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Temporal Asynchrony of Trophic Status Between Mainstream and Tributary Bay Within a Giant Dendritic Reservoir: The Role of Local-Scale Regulators
Xu, Yaoyang (1); Shao, Meiling (1); Han, Xinqin (1); Cai, Qinghua (1); Cai, Q.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China; (qhcai@ihb.ac.cn)
2011
Source PublicationWATER AIR AND SOIL POLLUTION
Volume219Issue:1-4Pages:271-284
AbstractLimnologists have regarded temporal coherence (synchrony) as a powerful tool for identifying the relative importance of local-scale regulators and regional climatic drivers on lake ecosystems. Limnological studies on Asian reservoirs have emphasized that climate and hydrology under the influences of monsoon are dominant factors regulating seasonal patterns of lake trophic status; yet, little is known of synchrony or asynchrony of trophic status in the single reservoir ecosystem. Based on monthly monitoring data of chlorophyll a, transparency, nutrients, and nonvolatile suspended solids (NVSS) during 1-year period, the present study evaluated temporal coherence to test whether local-scale regulators disturb the seasonal dynamics of trophic state indices (TSI) in a giant dendritic reservoir, China (Three Gorges Reservoir, TGR). Reservoir-wide coherences for TSICHL, TSISD, and TSITP showed dramatic variations over spatial scale, indicating temporal asynchrony of trophic status. Following the concept of TSI differences, algal productivity in the mainstream of TGR and Xiangxi Bay except the upstream of the bay were always limited by nonalgal turbidity (TSICHL-TSISD <0) rather than nitrogen and phosphorus (TSICHL-TSITN <0 and TSICHL-TSITP <0). The coherence analysis for TSI differences showed that local processes of Xiangxi Bay were the main responsible for local asynchrony of nonalgal turbidity limitation levels. Regression analysis further proved that local temporal asynchrony for TSISD and nonalgal turbidity limitation levels were regulated by local dynamics of NVSS, rather than geographical distance. The implications of the present study are to emphasize that the results of trophic status obtained from a single environment (reservoir mainstream) cannot be extrapolated to other environments (tributary bay) in a way that would allow its use as a sentinel site. © 2010 Springer Science+Business Media B.V.
KeywordTemporal Coherence Trophic State Indices Nonalgal Turbidity Limitation Three Gorges Reservoir
Department(1) State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; (2) Graduate University of Chinese Academy of Sciences, Beijing, 100049, China
Indexed BySCI
WOS IDWOS:000291249700023
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/14452
Collection淡水生态学研究中心_期刊论文
Corresponding AuthorCai, Q.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China; (qhcai@ihb.ac.cn)
Recommended Citation
GB/T 7714
Xu, Yaoyang ,Shao, Meiling ,Han, Xinqin ,et al. Temporal Asynchrony of Trophic Status Between Mainstream and Tributary Bay Within a Giant Dendritic Reservoir: The Role of Local-Scale Regulators[J]. WATER AIR AND SOIL POLLUTION,2011,219(1-4):271-284.
APA Xu, Yaoyang ,Shao, Meiling ,Han, Xinqin ,Cai, Qinghua ,Cai, Q.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China,&.(2011).Temporal Asynchrony of Trophic Status Between Mainstream and Tributary Bay Within a Giant Dendritic Reservoir: The Role of Local-Scale Regulators.WATER AIR AND SOIL POLLUTION,219(1-4),271-284.
MLA Xu, Yaoyang ,et al."Temporal Asynchrony of Trophic Status Between Mainstream and Tributary Bay Within a Giant Dendritic Reservoir: The Role of Local-Scale Regulators".WATER AIR AND SOIL POLLUTION 219.1-4(2011):271-284.
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