西藏林芝不同植被地表节肢动物群落多样性

Diversity of Arthropod Community on Different Vegetation Surfaces in Linzhi of Tibet

为了解西藏林芝不同植被地表节肢动物群落多样性水平,采用陷阱法对西藏农牧学院农场3种不同植物(油菜、杨柳、青稞)地表节肢动物群落结构、多样性及功能群结构进行研究。共捕获节肢动物1221头,隶属6纲11目28科。3种不同植被地表节肢动物群落结构相似,油菜、杨柳和青稞的优势种群同为鞘翅目步甲科,但数量分布有所不同,青稞地群落明显高于油菜、杨柳地。通过3种种植地多样性特征指数、功能群分布及相似性比较可知:杨柳地4项指数均高于油菜地和青稞地;3种种植地均是杂食性群落占比最大、寄生性群落占比最少;不同植被下种植地地表节肢动物类群相似性有差异。节肢动物群落组成及多样性在不同植被间存在显著差异,植被变化和人为干扰是影响其分布的重要因素。

To understand the diversity of surface arthropod community in different vegetations of Linzhi in Tibet.The trap structure was used to study the structure,diversity and functional group structure of the arthropods on the surface of three different plants of rape,willow and barley in farm of Tibet Agriculture and Animal Husbandry College.A total of 1221 arthropods were captured,which it belonged to 6 classes,11 orders and 28 families.The community structure of arthropods in three different vegetations was similar.The dominant populations of rapeseed,poplar and barley were the coleoptera,but the number distribution was different.The community of barley land was significantly higher than that of rape and willow land.According to the comparison of the diversity index,functional group distribution and similarity of the three planting areas,the four indexes of willow land were higher than that of rape land and barley land.The three planting sites were the most omnivorous community and the parasitic community accounted for the least ratio;the similarity of surface arthropod groups in different vegetations was different.In conclusion,the composition and diversity of arthropod community are significantly different among different vegetation,the vegetation changes and human disturbance are important factors to affect its distribution.