盐城市主要入海河流大型底栖动物群落结构及水生态评价

The community characteristics and water ecology evaluation of macrozoobenthos in seagoing rivers of Yancheng

为研究盐城主要入海河流水生态质量状况,利用河流水生态环境质量综合评价指数(WEQI)评价河流生态环境状况已成为重要方法,并基于2021年5月和9月盐城市主要入海河流底栖动物群落结构及水质数据进行水生态评价。结果表明:全年底栖动物Shannon-Wienner多样性指数为0.39~3.01,平均值为2.08,评级总体为良好。软体动物和节肢动物占比最高,达到77.5%,出现频率最高的是环棱螺属和长臂虾属,主要优势种为蜾蠃蜚属。入海河流断面WEQI评价结果主要为中等和良好,分别占比为60%和40%。生物和生境是制约盐城入海河流水生态环境质量的主要影响因素。

we used rivers water eco-environment quality comprehensive evaluation index,macrozoobenthos community structure and water quality data of main seagoing rivers of Yancheng in May and September 2021 to study the water eco-environment quality of seagoing rivers in Yancheng.The results of our survey showed that Shannon-Wiener index(H')was between 0.39-3.01,with a mean value at 3.08,the overall level of evaluation was good.Mollusca and Arthropoda accounted for the highest proportion,reaching 77.5%.The highest frequency of occurrence is Bellamya and Palaemonidae,and the main dominant species is Corophium.The WEQI evaluation results of seagoing rivers are mainly moderate and good,accounting for 60%and 40%respectively.Biology and habitat were the main factors affecting the water eco-environment quality.