title: Eutrophication strengthens the response of zooplankton to temperature changes in a high-altitude lake.
abstract: To assess whether and how zooplankton communities respond to variations in temperature and how these assemblages change with eutrophication, we performed a large-scale, monthly survey from August 2011 to July 2012 to determine the seasonal and spatial variations in these communities in a high-altitude lake. A detrended correspondence analysis and a path analysis demonstrated that temperature and chlorophyll a were important factors influencing zooplankton. The path diagram showed thatDaphniawas negatively affected directly by chlorophyll a and indirectly by temperature, whereasBosminawas directly and positively affected by temperature.Daphniaspp. decreased in both absolute and relative biomass during warm seasons, whereasBosminaspp. showed the opposite trend. Moreover, the lowestDaphniaspp. biomass was observed in the southern region, which was the most eutrophic. Our results indicate that increasing temperatures will continue to shift the dominant genus fromDaphniatoBosmina, and this change will be exacerbated by eutrophication. In addition, the zooplankton of Lake Erhai have shifted to smaller species over time as temperature and eutrophication have increased, which implies that zooplankton succession to small cladocerans may be markedly accelerated under further climate change and the increased eutrophication that has been observed in recent decades.
authors: Fisheries College Huazhong Agricultural University Wuhan 430070 Hubei China; Donghu Experimental Station of Lake Ecosystems State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 Hubei China.
authors: Yun
authors: Y
authors: Li
authors: Fisheries College Huazhong Agricultural University Wuhan 430070 Hubei China; Donghu Experimental Station of Lake Ecosystems State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 Hubei China.
authors: Ping
authors: P
authors: Xie
authors: Fisheries College Huazhong Agricultural University Wuhan 430070 Hubei China; Donghu Experimental Station of Lake Ecosystems State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 Hubei China.
authors: Dandan
authors: D
authors: Zhao
authors: Donghu Experimental Station of Lake Ecosystems State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 Hubei China.
authors: Tianshun
authors: T
authors: Zhu
authors: Donghu Experimental Station of Lake Ecosystems State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 Hubei China.
authors: Longgen
authors: L
authors: Guo
authors: Fisheries College Huazhong Agricultural University Wuhan 430070 Hubei China; Donghu Experimental Station of Lake Ecosystems State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 Hubei China.
authors: Jing
authors: J
authors: Zhang
keywords: Cyanobacterial blooms; detrended correspondence analysis; eutrophication; path analysis; temperature; zooplankton