Analysis of insect diversity and its correlation with vegetation in the natural grasslands of Bayannur,Inner Mongolia
In order to effectively control the pests of natural grasslands and repair natural grasslands,the Z-shaped sweeping net sampling method was used to investigate the insect species and quantity,veg-etation species and vegetation coverage of four natural grassland types,including temperate desert steppe,temperate steppe desert,temperate typical steppe and temperate desert in Bayannur City. The di-versity and similarity of insect communities in these grassland types were analyzed,along with the cor-relation between insect community diversity and vegetation factors (vegetation species and vegetation coverage). The results showed that a total of 2675 insects were collected from the four natural grass-lands in Bayannur City,belonging to eight orders,35 families,54 genera and 69 species. Among them,Orthoptera species were the most abundant and constituted the dominant species. The Shannon-Wiener diversity index and Margalef richness index of insect community in temperate desert steppe were sig-nificantly higher than those in the other three grassland types. The Jaccard similarity coefficients of in-sect species in the four grassland types were less than 0.50,indicating that there were significant differ-ences in insect species among the grassland types. The vegetation species were positively correlated with the Shannon-Wiener diversity index and Margalef richness index of the insect community,with vegetation species contributing greatly to diversity in the four grassland types. This indicates that the richer the vegetation in the natural grasslands of Bayannur City,the higher the insect diversity index.
万方数据
维普
