螺旋粉虱为害对寄主植物上节肢动物群落结构的影响研究

Local Arthropod Community Structure Influenced by Aleurodicus disperses Russell Invasion

采用随机取样法,调查受螺旋粉虱为害的2种寄主植物上节肢动物群落结构,以探讨螺旋粉虱为害对寄主植物上节肢动物群落结构的影响。结果表明:2种寄主中,受螺旋粉虱为害的植株,节肢动物发生量明显高于未受害植株,并且主要以同翅目类昆虫数量增加为主;受螺旋粉虱为害的洋紫荆植株上,节肢动物群落的物种数量明显高于未受害植株,群落结构也较为复杂,受螺旋粉虱为害与未为害的番石榴植株上,物种数量也有所增加,但群落结构组成未发生较大改变;整体而言,于未受害洋紫荆植株相比,受害洋紫荆植株的物种丰富度及多样性较高、物种发生较为均匀,而番石榴植株受害与未受害植株间,群落的物种丰富度、多样性及均匀度等各指数差异不明显;未受害洋紫荆寄主的种群优势度较受害洋紫荆的种群优势度高。

The local arthropod community structures on two plant hosts,Bauhinia blakeana and Psidium guavas L.,attacked by an alien invasive insect pest,Aleurodicus disperses Russell,were investigated by random sampling method.The result indicated that.（1） the population number of arthropods increased on two plants when damaged by the A.disperses,and the dominated by Homoptera.（2） Species of arthropod community was significantly higher than the health host,when B.blakeana were damaged by A.disperses,and the community structure became complicated,the same was found for the P.guavas,but the community structure didn’t become more complex.（3） Generally speaking,compared with the health host,the influenced host of the B.blakeana had high species richness and diversity and evenness,while for the health host or the influenced host of P.guavas,the difference for species richness,diversity and evenness was not significant.（4） Health host had high species dominance in arthropod community on B.blakeana.