Studies On The Community Structure And Diversity Of Insect In The Gardens In Taiyuan

The insects community structure and diversity were studies in gardens of taiyuan from Marth to November in 2002,and the results showed:There are 161 species of insect that belong to 11 order and 69 family in four types plant, flower garden, nursery garden, lawn and waifa trees, in Taiyuan.The insects of Col,Hom,Lep,Hym and Dip were popular.The most number in the families was the insects of Col and it added up to 14.There were not always more dominant families and species in the orders that included more families and species. The number of family and species and individal were not the same in diferrent types plant ecosystem. In different ecosyste-ms proportion of principal groups and dominant concen-tration index in insect community were different.Annual dominant spec-ies in each type plant were aphids and scales.The second dominant species were leaf hoppers and leaf beetles.The results showed that the richness of insect community were related to vegetation in the gardens .There were 113 ,103 and 70 species in the complex plan-ts,flower garden and nursery garden:there were only 30 species in waifa trees.The diversity and evenness indexes of insects were related to the diversity of vegetation,too.The indexes of flower garden, nurs-ery garden and lawn were higher,because there were more types of plant.For waifa trees,the indexes were lower,which were decided by its only plant.The anova analysis of diversity indexes showed that it is significant difference between waifa trees and the other-s.Among flower garden,nursery garden and lawn ,the differences were not so high; the change trend of evenness was similary to the diversity.Principal component analysis showed that there different main factors in different structural insect communities and the stucture more complex ,the main factors more obvious.