外来入侵植物紫茎泽兰对昆明地区土壤动物群落的影响

2005年雨季前后的6月至9月,共布设144个样方,采样分析了外来入侵植物紫茎泽兰(Eupatorium adeno-phorum)对云南昆明地区针叶林、阔叶林和草地3种主要生态系统类型地表腐叶层土壤动物群落的影响。研究结果表明,紫茎泽兰入侵后土壤动物类群总数显著减少,其中针叶林减少41.3%,阔叶林减少29.0%,草地减少36.7%;土壤动物群落个体总数下降,其中针叶林减少63.5%,阔叶林减少20.4%,草地减少43.2%。紫茎泽兰入侵影响土壤动物群落多样性和均匀度。6月至8月,在没有紫茎泽兰入侵情况下,针叶林和草地生态系统土壤动物群落多样性、均匀度逐步升高;紫茎泽兰入侵后,由于土壤动物类群数量及部分类群个体数量减少,针叶林和草地土壤动物群落多样性、均匀度有所降低。

Impacts of Invasive Alien Plant Eupatorium adenophorum on Soil Animal Communities in Kunming

Impacts of invasive alien plant Eupatorium adenophorum on soil animal communities in three main ecosystems,coniferous forest,broad-leaved forest and meadow in Kunming,Yunnan Province were analyzed.Data,including 144 samples,were collected in the raining season from June to September of 2005.Compared to non-infested area,the number of species groups of soil animals decreased significantly by 41.3%,29.0% and 36.7% in the coniferous forest,broad-leaved forest and meadow,respectively.The number of individuals in each animal group decreased by 63.5%,20.4% and 43.2% in the coniferous forest,broad-leaved forest and meadow,respectively.The invasion of the plant also affected diversity and evenness of the soil animals.In the coniferous forest and meadow ecosystems free of Eupatorium adenophorum,community diversity and evenness kept increasing from June to August,but the invasion of the plants resulted in the decrease in numbers of soil animal groups and individuals in some groups,thus changed the trend.