生态环境学报2024，Vol.33Issue(11)：1748-1755,8.DOI:10.16258/j.cnki.1674-5906.2024.11.009
渌水流域枯水期水生态环境空间特征及其评价
Spatial Characteristics and Evaluation of Water Ecological Environment in Lushui Basin during Dry Season
摘要
Abstract
The aquatic ecological environment is a key component of comprehensive national water management,and can provide critical ecological services.With the acceleration of urbanization and water resource consumption by industry and life,sewage discharge loading has been observed.Therefore,water ecological and environmental problems have received considerable attention.This study focuses on the Lushui River Basin in the Zhuzhou area.Eight sections from the upstream region and two representative reservoirs were distributed to evaluate the spatial heterogeneity of habitat and aquatic biological indicators during a typical dry season in 2022.The results showed that the sediments of most sections were primarily composed of gravel and fine sand but with marked soil attachment to the overall gravel,which may be related to the surrounding soil erosion and high water turbidity,except for the tributary Tieshui.The two reservoirs exhibited clear sandy substrates,indicating good habitat conditions.The best riverbed quality was observed in the section where Tieshui entered Lushui,which was dominated by fine sand without a significant silt attachment.Six 6 phyla of phytoplankton,four phyla of zooplankton,and three phyla of macrobenthic invertebrates were identified.The average cell density of phytoplankton was 0.649×106 cell·L-1,with an average biomass of 0.996 mg·L-1,while that of zooplankton was 147 ind·L-1,with an average biomass of 0.126 mg·L-1.The biomass and density of phytoplankton and zooplankton in the Sandaoshi and Xianjing sections in the middle and lower reaches of densely populated areas were significantly higher than those at other monitoring points,and the health status of the habitat was relatively poor,which may be related to human vegetable planting activities on both sides of the river and early rain runoff from urban areas.The biodiversity and habitat status of the reservoir were better than those of the river section were.The distribution of microbenthic invertebrates is affected by the degree of preference for the microenvironment and there is no obvious spatial law of biomass and diversity.The evaluation results of the Shannon-Wiener and BMWP indices showed that the water ecological health level and biodiversity of the Lushui Basin require further improvement.There was no significant correlation between the CWQI value of the water quality index and aquatic biological indicators,but the correlation between total phosphorus and water ecological indicators of a single water quality index was relatively high,which needs to be paid more attention in the future.The results provide a scientific basis for water habitat,water ecology,and the three-water control and protection of water resources in the Lushui River Basin.关键词
渌水流域/生境/水生生物/水生态/空间特征/水生态健康评价Key words
Lushui basin/habitat/aquatic organism/water ecology/spatial characteristics/water ecological health assessment分类
资源环境引用本文复制引用
丁洪伟,郭婷婷,郭晓辉,雷鸣,刘孝利..渌水流域枯水期水生态环境空间特征及其评价[J].生态环境学报,2024,33(11):1748-1755,8.基金项目
湖南省株洲市长江水生态环境保护驻点研究(2022-LHYJ-02-0507-01) （2022-LHYJ-02-0507-01）
