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	Changes in physicochemical and biological factors during regime shifts in a restoration demonstration of macrophytes in a small hypereutrophic Chinese lake
	Zhang, Shi-yang1,2; Liu, Ai-fen3; Ma, Jian-min4; Zhou, Qiao-hong1; Xu, Dong1; Cheng, Shui-ping1; Zhao, Qiang1; Wu, Zhen-bin1
刊名	ECOLOGICAL ENGINEERING
	2010-12-01
卷号	36期号:12页码:1611-1619
关键词	Eutrophic Turbid Submerged macrophyte Zooplankton Regime shift
ISSN号	0925-8574
通讯作者	Wu, ZB, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
中文摘要	Shallow, eutrophic lakes are usually characterized by a turbid state devoid of submerged vegetation subject to human-induced eutrophication. In most cases, it is rather hard to restore a vegetated clear state due to reduced resilience caused by a blend of complicated factors. In this study, we successfully reestablished a plant community in a small hypereutrophic lake over a certain period. In winter and spring with transparency of >55 cm and temperature of <20 degrees C, a submerged stands bed formed gradually under strong human interventions. The reestablished plant bed displayed obvious seasonal succession and prolonged the clear-water stage until July 2005, when it collapsed. The regime shift to a turbid state was mainly attributed to the decreasing biomass of stands bed and mechanical damage brought about by the elimination of Spirodela polyrhiza, increasing water temperature. P concentration as well as periphyton biomass, etc. The reestablishment also changed the aquatic ecosystem greatly. A 'clear-water' stage was characterized by higher NO3--N, NH4+-N, electrical conductivity, transparency and TN/TP level and more cladocerans (mainly Daphnia pulex), while the turbid state was characterized by higher temperature, chlorophyll a and TP level and more abundant rotifers. It is thus viable to restore submerged macrophytes in such lakes in winter and spring, when transparency is relatively high while temperature and water level are low. Nevertheless, to obtain a long-term, vegetated clear state, control of internal nutrient loading by means of obstruction, purification, dredging or solidification, is extremely necessary since nutrients play an important role in regime shifts as evidenced by the present case, too. (C) 2010 Published by Elsevier B.V.
英文摘要	Shallow, eutrophic lakes are usually characterized by a turbid state devoid of submerged vegetation subject to human-induced eutrophication. In most cases, it is rather hard to restore a vegetated clear state due to reduced resilience caused by a blend of complicated factors. In this study, we successfully reestablished a plant community in a small hypereutrophic lake over a certain period. In winter and spring with transparency of >55 cm and temperature of <20 degrees C, a submerged stands bed formed gradually under strong human interventions. The reestablished plant bed displayed obvious seasonal succession and prolonged the clear-water stage until July 2005, when it collapsed. The regime shift to a turbid state was mainly attributed to the decreasing biomass of stands bed and mechanical damage brought about by the elimination of Spirodela polyrhiza, increasing water temperature. P concentration as well as periphyton biomass, etc. The reestablishment also changed the aquatic ecosystem greatly. A 'clear-water' stage was characterized by higher NO(3)(-)-N, NH(4)(+)-N, electrical conductivity, transparency and TN/TP level and more cladocerans (mainly Daphnia pulex), while the turbid state was characterized by higher temperature, chlorophyll a and TP level and more abundant rotifers. It is thus viable to restore submerged macrophytes in such lakes in winter and spring, when transparency is relatively high while temperature and water level are low. Nevertheless, to obtain a long-term, vegetated clear state, control of internal nutrient loading by means of obstruction, purification, dredging or solidification, is extremely necessary since nutrients play an important role in regime shifts as evidenced by the present case, too. (C) 2010 Published by Elsevier B.V.
学科主题	Ecology; Engineering, Environmental; Environmental Sciences
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Technology
类目[WOS]	Ecology ; Engineering, Environmental ; Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology ; Engineering
关键词[WOS]	SHALLOW EUTROPHIC LAKES ; LONG-TERM ; WATER-QUALITY ; SUBMERSED MACROPHYTES ; TROPHIC INTERACTIONS ; PHYTOPLANKTON ; ZOOPLANKTON ; COMMUNITY ; GROWTH ; TAIHU
收录类别	SCI
资助信息	High-Tech Research Program (863) of China [2009ZX07106-002-004]; National Natural Science Foundation of China [30870221, 20877093, 50808172, 50909091]
语种	英语
WOS记录号	WOS:000284384900002
公开日期	2010-12-23
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/13671]
专题	水生生物研究所_水环境工程研究中心_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 3.Zhangzhou Normal Univ, Zhangzhou 363000, Fujian Province, Peoples R China 4.Henan Normal Univ, Xinxiang 453007, Henan Province, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Shi-yang,Liu, Ai-fen,Ma, Jian-min,et al. Changes in physicochemical and biological factors during regime shifts in a restoration demonstration of macrophytes in a small hypereutrophic Chinese lake[J]. ECOLOGICAL ENGINEERING,2010,36(12):1611-1619.
APA	Zhang, Shi-yang.,Liu, Ai-fen.,Ma, Jian-min.,Zhou, Qiao-hong.,Xu, Dong.,...&Wu, Zhen-bin.(2010).Changes in physicochemical and biological factors during regime shifts in a restoration demonstration of macrophytes in a small hypereutrophic Chinese lake.ECOLOGICAL ENGINEERING,36(12),1611-1619.
MLA	Zhang, Shi-yang,et al."Changes in physicochemical and biological factors during regime shifts in a restoration demonstration of macrophytes in a small hypereutrophic Chinese lake".ECOLOGICAL ENGINEERING 36.12(2010):1611-1619.

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