摘要
通过2004年9月、12月和2005年3月3次对长江江苏段底栖动物的定量调查及平时的定性补充调查,结果共发现底栖动物58种,其中环节动物门12种、软体动物门16种、节肢动物门30种;平均密度为95.03 ind/m2,不同水期密度分别为丰水期115.74 ind/m2、平水期127.07 ind/m2、枯水期42.27 ind/m2;主要优势种为中华颤蚓、钉螺、日本沙蚕、河蚬和苏氏尾鳃蚓;Shannon-W iener生物多样性指数为3.281,平均水质综合评定为轻度污染。
By investigating the zoobenthos in the Jiangsu section of the Yangtze River in September 2004, December 2004 and March 2005, 58 species of zoobenthos were found out in the Jiangsu section of the Yangtze River, including 12 species of Annelida, 16 species of Mollusca and 30 species of Arthropoda. The average density of the zoobenthos in the Jiangsu section of the Yangtze River was 95.03 ind/m^2. The density was 115.74 ind/m^2 in flood period, 127.07 ind/m^2 in usual dischange period, and 42.27 ind/m^2 in drought period, respectively. The dominant species were Tubifex sincus, Oncomelania sp. , Nereis japonica, Corbicula fluminea and Branchiura sowerbyi. The Shannon-Wiener species diversity index of the Jiangsu section was 3. 281. It could be overall evaluated that the average water quality in the Jiangsu section was slightly polluted.
出处
《海洋渔业》
CSCD
2006年第4期272-277,共6页
Marine Fisheries
基金
江苏省环保厅环保科技项目"长江江苏段生物多样性调查研究(编号2004013)"
"江苏省水生生物调查与评估(编号3)"资助
关键词
长江
江苏
底栖动物
环境
生物多样性
资源
The Yangtze River
Jiangsu
zoobenthos
environment
species diversity
resource
