Temporal Asynchrony of Trophic Status Between Mainstream and Tributary Bay Within a Giant Dendritic Reservoir: The Role of Local-Scale Regulators

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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 1,2; Shao, Meiling 1; Han, Xinqin 1,2; Cai, Qinghua 1
刊名	WATER AIR AND SOIL POLLUTION
	2011-07-01
卷号	219 期号:1-4 页码:271-284
关键词	Temporal coherence Trophic state indices Nonalgal turbidity limitation Three Gorges Reservoir
ISSN号	0049-6979
通讯作者	Cai, Q.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China ; (qhcai@ihb.ac.cn)
中文摘要	Limnologists 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.
英文摘要	Limnologists 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 TSI(CHL), TSI(SD), and TSI(TP) 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 (TSI(CHL)-TSI(SD) < 0) rather than nitrogen and phosphorus (TSI(CHL)-TSI(TN) < 0 and TSI(CHL)-TSI(TP) < 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 TSI(SD) 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.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]	Environmental Sciences ; Meteorology & Atmospheric Sciences ; Water Resources
研究领域[WOS]	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources
关键词[WOS]	NORTH-TEMPERATE LAKES ; 3 GORGES RESERVOIR ; XIANGXI BAY ; FRESH-WATER ; SPATIAL AUTOCORRELATION ; POPULATION SYNCHRONY ; 3-GORGES RESERVOIR ; MARINE ECOSYSTEMS ; CHLOROPHYLL-A ; EUTROPHICATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000291249700023
公开日期	2011-03-14
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/14452]
专题	水生生物研究所_淡水生态学研究中心_期刊论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 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.(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.