1. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; 2. Changjiang River Scientific Research Institute, Wuhan 430010, China; 3. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
Eutrophication can shift lakes from a clear, macrophyte-dominated state to a turbid, algae-dominated state, and different habitat condition supports different fauna. Macrozoobenthos are good indicators of water environment, and studies on macrozoobenthic assemblage characteristics can help us to know which state a lake is in, thus provide the basis for its eutrophication control. In this study, a systematic investigation on macrozoobenthos was conducted in 17 Yangtze-isolated lakes to explore the macroecological laws of macrozoobenthic assemblages. Detrended correspondence analysis (DCA) revealed that variance of benthic assemblage structure occurred in two types of lakes. In macrophytic lakes, altogether 51?taxa of macrozoobenthos were identified. The average density and biomass of total macrozoobenthos were 2231?individuals·m-2 and 1.69 g dry weight·m-2, respectively. Macrozoobenthic assemblage was characterized by dominance of scrapers (i.e. gastropods). In algal lakes, altogether 20 taxa of macrozoobenthos were identified. The average density and biomass of total macrozoobenthos were 2814 individuals·m-2 and 1.38 g dry weight·m-2, respectively. Macrozoobenthic assemblage was characterized by dominance of collector-gatherers (i.e. oligochaetes). Wet biomass of submersed macrophytes (BMac) and phytoplankton chlorophyll a concentration (Chla) were demonstrated as the key factor structuring macrozoobenthic assemblages in macrophytic and algal lakes, respectively.
Corresponding Author(s):
WANG Hongzhu,Email:wanghz@ihb.ac.cn
引用本文:
. Macrozoobenthic assemblages in relation to environments of the Yangtze-isolated lakes[J]. Frontiers of Environmental Science & Engineering, 0, (): 246-254.
Baozhu PAN, Haijun WANG, Hongzhu WANG, Zhaoyin WANG. Macrozoobenthic assemblages in relation to environments of the Yangtze-isolated lakes. Front Envir Sci Eng, 0, (): 246-254.
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