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学科主题: Environmental Sciences
题名: SEASONAL REGIME SHIFT OF AN ALTERNATIVE-STATE LAKE XINGYUN, CHINA
作者: Wang, Yingcai1, 2; Wang, Zhicong1; Wu, Weiju1; Hu, Mingming1; Wang, Zhen1; Xu, Aihua1; Li, Genbao1; Liu, Yongding1
通讯作者: Liu, YD, Chinese Acad Sci, Inst Hydrobiol, 7 S Donghu Rd, Wuhan 430072, Hubei Province, Peoples R China
关键词: alternative states ; phytoplankton population ; threshold concentration ; regime shift ; driving force
刊名: FRESENIUS ENVIRONMENTAL BULLETIN
发表日期: 2010
卷: 19, 期:8, 页:1474-1485
收录类别: SCI
文章类型: Article
部门归属: [Wang, Yingcai; Wang, Zhicong; Wu, Weiju; Hu, Mingming; Wang, Zhen; Xu, Aihua; Li, Genbao; Liu, Yongding] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei Province, Peoples R China; [Wang, Yingcai] Yangtze Valley Water Environm Monitoring Ctr, Wuhan 430010, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: 973 project [2008ZX07106]; State major science and technology special projects [2008ZX07105-006, 2008ZX07102-005]
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
摘要: For a natural lake, there are usually two stable states, a clean state and a turbid state. However, there exists an alternative state, which is unstable and can shift to either a clean or a turbid state depending on varied environmental factors. In this paper, we report a lake undergoing a pattern of seasonal shifting. We found that Lake Xingyun appeared clean in winter with low level of nutrients, low Chlorophyll a (Chl-a) and high secchi depth (SD). However, during summer, the lake turned into turbid with higher level of nutrients and Chl-a, but lower SD. In close response to environmental changes, phytoplankton population of the lake also adopted a pattern of seasonal shift. The order of the seasonal appearances of the dominant populations was as follows: Cyanophyta and Cryptophyta in spring, Microcystis in summer, Melosira in autumn, and Chlorophyta in winter. Our data clearly indicate that Lake Xingyun stayed in clean state in winter but became turbid in summer, and 0.07-0.135mg/L can be considered as the total phosphorus (TP) threshold concentration for Lake Xingyun's alternation between those two states. We also found that both TP and water temperature were the major factors influencing the phytoplankton biomass and its succession. In addition, wind also played a significant role in promoting the dominance of Chlorophyta in winter. In conclusion, Lake Xingyun, represents an alternative state lake with a certain nutrient level, can undergo a seasonal regime shift. Temperature change is the primary force that drives Lake Xingyun to shift its regime state.
英文摘要: For a natural lake, there are usually two stable states, a clean state and a turbid state. However, there exists an alternative state, which is unstable and can shift to either a clean or a turbid state depending on varied environmental factors. In this paper, we report a lake undergoing a pattern of seasonal shifting. We found that Lake Xingyun appeared clean in winter with low level of nutrients, low Chlorophyll a (Chl-a) and high secchi depth (SD). However, during summer, the lake turned into turbid with higher level of nutrients and Chl-a, but lower SD. In close response to environmental changes, phytoplankton population of the lake also adopted a pattern of seasonal shift. The order of the seasonal appearances of the dominant populations was as follows: Cyanophyta and Cryptophyta in spring, Microcystis in summer, Melosira in autumn, and Chlorophyta in winter. Our data clearly indicate that Lake Xingyun stayed in clean state in winter but became turbid in summer, and 0.07-0.135mg/L can be considered as the total phosphorus (TP) threshold concentration for Lake Xingyun's alternation between those two states. We also found that both TP and water temperature were the major factors influencing the phytoplankton biomass and its succession. In addition, wind also played a significant role in promoting the dominance of Chlorophyta in winter. In conclusion, Lake Xingyun, represents an alternative state lake with a certain nutrient level, can undergo a seasonal regime shift. Temperature change is the primary force that drives Lake Xingyun to shift its regime state.
关键词[WOS]: SHALLOW EUTROPHIC LAKE ; PHYTOPLANKTON SUCCESSION ; PHOSPHORUS ; NUTRIENT ; ZOOPLANKTON ; TEMPERATURE ; DYNAMICS ; CLIMATE ; MECHANISMS ; RESPONSES
语种: 英语
WOS记录号: WOS:000281051200011
ISSN号: 1018-4619
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/13689
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei Province, Peoples R China
2.Yangtze Valley Water Environm Monitoring Ctr, Wuhan 430010, Peoples R China

Recommended Citation:
Wang, Yingcai; Wang, Zhicong; Wu, Weiju; Hu, Mingming; Wang, Zhen; Xu, Aihua; Li, Genbao; Liu, Yongding.SEASONAL REGIME SHIFT OF AN ALTERNATIVE-STATE LAKE XINGYUN, CHINA,FRESENIUS ENVIRONMENTAL BULLETIN,2010,19(8):1474-1485
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