摘要
长期以来对采砂影响下鄱阳湖水质演化和大型底栖动物的群落结构演变缺乏深入理解。通过分区采集水质、沉积物和大型底栖动物样品,利用反距离权重法插值、主成分分析、多样性指数对比、典范对应分析等方法,分析物理化学指标和生物物种的分布特征及演变规律。结果显示:水体浊度和悬浮物在采砂区下游显著增大;水体总磷含量在采砂区下游有轻微上升,未采砂区沉积物营养盐含量高于历史采砂区和规划采砂区;未采砂区大型底栖动物的Simpson、Shannon-Wiener和Margalef多样性指数也大于历史采砂区和规划采砂区。以上结果表明,采砂扰动沉积物,引起附近水体悬浮物浓度升高,影响水体和沉积物的营养盐组分,降低了大型底栖动物的多样性指数。
Poyang Lake has abundant sand resources,but there has been a lack of in-depth understanding on the evolution of water quality and the community structure of macrozoobenthic under the influence of sand mining for a long time.In this study,water quality,sediment and macrozoobenthos samples were collected by partition,and the distribution and evolution of physical and chemical indexes and biological species were analyzed by using inverse distance weight interpolation,principal component analysis,diversity index comparison and canonical corresponding analysis.The results showed that the turbidity and suspended solids of water significantly increased in the downstream of the sand mining area;the total phosphorus content of water increased slightly in the lower reaches of the sand mining area,and the nutrient content of sediment in the non-sand mining area was higher than that in the historical sand mined area and the planned sand mining area.The Simpson,Shannon Wiener,and Margalef diversity indices of macrozoobenthic in the non-sand mining area were also higher than those in historical and planned sand mining areas.The above results indicate that sand mining disturbs sediment,causing an increase in suspended solids concentration in nearby water bodies,affecting the nutrient composition of water and sediment,and reducing the diversity index of macrobenthic animals.
作者
薛肖斌
黄小龙
王雨婷
XUE Xiaobin;HUANG Xiaolong;WANG Yuting(Hydrogeology and Engineering Geology Institute of Hubei Geological Bureau,Jingzhou 430020,China;Hubei Key Laboratory of Resources and Eco-Environment Geology,Hubei Geological Bureau,Wuhan 430034,China;Ecological Environment Monitoring and Scientific Research Center,Yangtze River Basin Ecological Environment Supervision and Administration Bureau of Ministry of Ecology and Environment,Wuhan 430014,China)
出处
《人民长江》
北大核心
2023年第12期50-57,共8页
Yangtze River
基金
国家自然科学基金项目(42177067,42020104005)
湖北省地质局生态环境地质专项(42000023622T000000231)
湖北省自然科学基金项目(2023AFB518)。
关键词
采砂
水质
生态环境
底栖动物
鄱阳湖
sand mining
water quality
ecological environment
macrozoobenthic
Poyang Lake
