Lake ecosystems confront escalating challenges to their stability and resilience,most intuitively leading to biodiversity loss,necessitating effective preservation strategies to safeguard aquatic environments.However,...Lake ecosystems confront escalating challenges to their stability and resilience,most intuitively leading to biodiversity loss,necessitating effective preservation strategies to safeguard aquatic environments.However,the complexity of ecological processes governing lake biodiversity under multi-stressor interactions remains an ongoing concern,primarily due to insufficient long-term bioindicator data,particularly concerning macroinvertebrate biodiversity.Here we utilize a unique,continuous,and in situ biomonitoring dataset spanning from 2011 to 2019 to investigate the spatio-temporal variation of macroinvertebrate communities.We assess the impact of four crucial environmental parameters on Lake Dongting and Lake Taihu,i.e.,water quality,hydrology,climate change,and land use.These two systems are representative of lakes with Yangtze-connected and disconnected subtropical floodplains in China.We find an alarming trend of declining taxonomic and functional diversities among macroinvertebrate communities despite improvements in water quality.Primary contributing factors to this decline include persistent anthropogenic pressures,particularly alterations in human land use around the lakes,including intensified nutrient loads and reduced habitat heterogeneity.Notably,river-lake connectivity is pivotal in shaping differential responses to multiple stressors.Our results highlight a strong correlation between biodiversity alterations and land use within a 2e5 km radius and 0.05e2.5 km from the shorelines of Lakes Dongting and Taihu,respectively.These findings highlight the importance of implementing land buffer zones with specific spatial scales to enhance taxonomic and functional diversity,securing essential ecosystem services and enhancing the resilience of crucial lake ecosystems.展开更多
近年来,为促进经济发展,实现生态环境恢复,中国政府开展了一系列的河湖连通工程建设。目前,工程建设后有关社会经济发展方面的效果评估工作较多,而缺乏在水环境改善方面的定量评估。为了科学评价河湖连通工程的环境效益,从河湖连通工程...近年来,为促进经济发展,实现生态环境恢复,中国政府开展了一系列的河湖连通工程建设。目前,工程建设后有关社会经济发展方面的效果评估工作较多,而缺乏在水环境改善方面的定量评估。为了科学评价河湖连通工程的环境效益,从河湖连通工程的历史发展和作用出发,利用VOSviewer对Web of Science核心合集和中国知网数据库中有关河湖连通工程的研究进展及其变化趋势进行可视化分析,总结该领域的主要研究热点。结合国内外有关水环境质量评价与污染源解析的研究方法,深入探讨河湖连通工程的环境效益评估方法。结果可为河湖连通工程建设后的水环境影响与效益评估提供科学指导。展开更多
基金supported by National Natural Science Foundation of China(42322710,41977364)National Key Research and Development Program of China(2021YFC3200105)+2 种基金the Joint Research Project for the Yangtze River Conservation(Phase II),China(NO.2022-LHYJ-02-0101).Prof.Giesy was supported by the“High Level Foreign Experts”program(#GDT20143200016)funded by the State Administration of Foreign Experts Affairs,the P.R.China to Nanjing University and the Einstein Professor Program of the Chinese Academy of Sciencessupported by the Canada Research Chair program and a Distinguished Visiting Professorship in the Department of Environmental Sciences at Baylor University,Waco,Texas,USA.
文摘Lake ecosystems confront escalating challenges to their stability and resilience,most intuitively leading to biodiversity loss,necessitating effective preservation strategies to safeguard aquatic environments.However,the complexity of ecological processes governing lake biodiversity under multi-stressor interactions remains an ongoing concern,primarily due to insufficient long-term bioindicator data,particularly concerning macroinvertebrate biodiversity.Here we utilize a unique,continuous,and in situ biomonitoring dataset spanning from 2011 to 2019 to investigate the spatio-temporal variation of macroinvertebrate communities.We assess the impact of four crucial environmental parameters on Lake Dongting and Lake Taihu,i.e.,water quality,hydrology,climate change,and land use.These two systems are representative of lakes with Yangtze-connected and disconnected subtropical floodplains in China.We find an alarming trend of declining taxonomic and functional diversities among macroinvertebrate communities despite improvements in water quality.Primary contributing factors to this decline include persistent anthropogenic pressures,particularly alterations in human land use around the lakes,including intensified nutrient loads and reduced habitat heterogeneity.Notably,river-lake connectivity is pivotal in shaping differential responses to multiple stressors.Our results highlight a strong correlation between biodiversity alterations and land use within a 2e5 km radius and 0.05e2.5 km from the shorelines of Lakes Dongting and Taihu,respectively.These findings highlight the importance of implementing land buffer zones with specific spatial scales to enhance taxonomic and functional diversity,securing essential ecosystem services and enhancing the resilience of crucial lake ecosystems.
文摘近年来,为促进经济发展,实现生态环境恢复,中国政府开展了一系列的河湖连通工程建设。目前,工程建设后有关社会经济发展方面的效果评估工作较多,而缺乏在水环境改善方面的定量评估。为了科学评价河湖连通工程的环境效益,从河湖连通工程的历史发展和作用出发,利用VOSviewer对Web of Science核心合集和中国知网数据库中有关河湖连通工程的研究进展及其变化趋势进行可视化分析,总结该领域的主要研究热点。结合国内外有关水环境质量评价与污染源解析的研究方法,深入探讨河湖连通工程的环境效益评估方法。结果可为河湖连通工程建设后的水环境影响与效益评估提供科学指导。
