重金属污染对土壤动物群落生态影响的研究

A Research on the Ecological Effect of the Soil Animals Community by the Heavy Metal Pollution

研究结果表明，污染区土壤动物种类计有３１类，蝉螨类和弹尾类为优势类群，其它２９类为常见类群和稀有类群；土壤动物种类和数量随着污染影响程度的增加而减少，土壤动物数量变化主要由于优势类群的数量消长，土壤动物种类的减少则由于污染敏感种类的减少或消失。大型土壤动物蚯蚓和蜘蛛对重金属元素有很强的富集能力，体内的Ｃｄ、Ｐｈ、Ａｓ含量与土壤中Ｃｄ、Ｐｈ、Ａｓ含量呈明显地正相关，而蜈蚣对重金属的富集明显减弱。

The research results show that there are 31 soil animal species in the polluted area, in which Acarina and Collenbola are dominant population.The species and quantities of the soil animals are decreased with the aggravation of pollution,which can be found mainly from the growth and decline of the dominant population and decrease and disappearance of the polluted sensitive species.The big animals,such as earthworm and spider, have a strong ability to acculate heavy metal elements. The content of Cd.Pb.As in these animal's body relates proportionally to the metals in soil, but the centipede's ability in accumulating the heavy metal elements is abviously weaken.