大连市区沿海底栖动物的种、量和对环境质量的评价

Species and number of benthos and evaluation about environment in the waters of Dalian coast

1997年 1 0月～ 1 998年 7月对大连市区沿海 1 0个站位 (南部沿海 4个站位、大连湾 6个站位 )进行了 3次底栖动物调查 ,共获大型底栖动物 79种 ,其中多毛类 42种、软体动物 2 3种、节肢动物 7种、棘皮动物 2种、海鞘 2种、其它 3种。平均栖息密度为4663 3个 /m2 ,平均生物量为 740 5g/m2 。同时测定了相关的水化指标。

The benthos were studied based on three surveys in 10 stations in the waters of Dalian coast from Docter, 1997 to July, 1998. The results showed that 79 species of benthos were indentified, 42 species of which are polychaeta, 23 mullusca, 7 arthropoda, 3 echinodermata, 2 tunicata and 2 other animals. The average density and biomass (wet weight) of benthos was 4663.3 ind./m 2 and 740.5 g/m 2 . The analysis based on the resuls showed that the waters of Dalian coast have been polluted lightly or moderately.