Qiandao Lake,a key drinking water reservoir and a national model for Stocking-based Ecological Fisheries(SEF)in China,has been intensively managed to balance fishery productivity with ecological health.We investigated...Qiandao Lake,a key drinking water reservoir and a national model for Stocking-based Ecological Fisheries(SEF)in China,has been intensively managed to balance fishery productivity with ecological health.We investigated the spatiotemporal dynamics of its fish assemblage and its interactions with water quality,phytoplankton,zooplankton,and macrobenthos.Non-Metric Multidimensional Scaling(NMDS)and Analysis of Similarities(ANOSIM)highlighted seasonal and spatial disparities in fish assemblage structure.Machine learning models demonstrated that water quality variables were strong predictors of fish and assemblage composition than biotic indicators.Phytoplankton and zooplankton density and biomass predominantly influenced fish abundance.Nonnative species have steadily increased in abundance and biomass,coupled with a decline in native piscivorous fish,indicating the need to change fishing bans and enhance protected areas.展开更多
基金financially supported by the National Key Research and Development Program of China(No.2023YFD2400900)the earmarked fund for China Agriculture Research System(CARS-45).
文摘Qiandao Lake,a key drinking water reservoir and a national model for Stocking-based Ecological Fisheries(SEF)in China,has been intensively managed to balance fishery productivity with ecological health.We investigated the spatiotemporal dynamics of its fish assemblage and its interactions with water quality,phytoplankton,zooplankton,and macrobenthos.Non-Metric Multidimensional Scaling(NMDS)and Analysis of Similarities(ANOSIM)highlighted seasonal and spatial disparities in fish assemblage structure.Machine learning models demonstrated that water quality variables were strong predictors of fish and assemblage composition than biotic indicators.Phytoplankton and zooplankton density and biomass predominantly influenced fish abundance.Nonnative species have steadily increased in abundance and biomass,coupled with a decline in native piscivorous fish,indicating the need to change fishing bans and enhance protected areas.
