东川区草地蝗虫多样性与当地环境之间的关系

The Relationship between Grasshopper Diversity andLocal Environment in Dongchuan District

为探究草地蝗虫的多样性特征,以东川区的高山和河谷6个不同海拔(1 050、1 155、1 250、1 350 m、2 220及3 100 m)的草地作为采样地,通过野外随机网捕的方法对草地蝗虫进行采样,进行种类鉴定和数据分析。结果显示:东川区草地蝗虫为东洋区系,共有4科15属19种;高山区的草地蝗虫的Shannon-Wiener多样性指数和Pielou均匀度指数均高于河谷;河谷地区的不同海拔带中,多样性指数最高的是海拔1 155 m区域,均匀度指数最高的是海拔1 250 m区域;高山地区的不同海拔带中,多样性指数最高的是海拔2 220 m区域,均匀度指数最高的是海拔1 350 m区域。结果表明:东川区的草地蝗虫虫口密度低(平均0.08头/m2),处于有虫不成灾的状态,证明当地草原的生态系统相对稳定,其中高山区域的草地蝗虫多样性指数较高,应加强对高山地区草地的蝗虫监测。

Explore the diversity characteristics of grassland locusts in Dongchuan District to provide theoretical support for locust diversity protection and locust control in the region.Six grasslands at different altitudes in the mountains and river valleys of Dongchuan District were selected as sampling sites,and grassland locusts were sampled through outdoor random net capture,and finally brought back to the laboratory for specimen preparation and identification and data statistical analysis.The Oriental species was the dominant species in Dongchuan district,and there were 19 species in 4 families,15 genera.Shannon-Wiener diversity index and Pielou evenness index of grasshoppers in alpine grassland were higher than those in river valley.Among the different elevations in the valley,the highest diversity index is 1155 m and the highest evenness index is 1250 m.Among different elevations in the alpine region,the highest diversity index is 2220 m and the highest evenness index is 1350 m.The population density of grassland locusts in Dongchuan District is low(average 0.08 individuals/m 2),and they are in a state of no disaster.This indicates that the ecosystem of the local grassland is relatively stable.Among them,the diversity index of grassland locusts in the high mountains is relatively high.We should strengthen the monitoring of grasshoppers in the high mountains.Locust monitoring in regional grasslands.