Li Yun, Xie Ping, Zhao Dandan, Zhu Tianshun, Guo Longgen, Zhang Jing
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.
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.
Ecol Evol. 2016 Aug 30;6(18):6690-6701. doi: 10.1002/ece3.2308. eCollection 2016 Sep.
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 that was negatively affected directly by chlorophyll a and indirectly by temperature, whereas was directly and positively affected by temperature. spp. decreased in both absolute and relative biomass during warm seasons, whereas spp. showed the opposite trend. Moreover, the lowest spp. 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 from to , 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.
为了评估浮游动物群落是否以及如何对温度变化做出反应，以及这些群落如何随富营养化而变化，我们在2011年8月至2012年7月期间进行了一项大规模的月度调查，以确定一个高海拔湖泊中这些群落的季节和空间变化。去趋势对应分析和路径分析表明，温度和叶绿素a是影响浮游动物的重要因素。路径图显示，[未明确的浮游动物种类1]直接受到叶绿素a的负面影响，并间接受到温度的影响，而[未明确的浮游动物种类2]则直接受到温度的正向影响。[未明确的浮游动物种类1]在温暖季节的绝对生物量和相对生物量均下降，而[未明确的浮游动物种类2]则呈现相反的趋势。此外，在最富营养化的南部地区观察到[未明确的浮游动物种类1]的生物量最低。我们的结果表明，温度升高将继续使优势属从[未明确的浮游动物种类1]转变为[未明确的浮游动物种类2]，而富营养化将加剧这种变化。此外，随着温度和富营养化的增加，洱海的浮游动物随着时间的推移已转向更小的物种，这意味着在未来气候变化以及近几十年来观察到富营养化加剧的情况下，浮游动物向小型枝角类动物的演替可能会明显加速。
