内蒙古锡林河流域不同生境中蝗虫种类组成的分析

COMPOSITIONS OF GRASSHOPPER SPECIES OF DIFFERENT HABITATS IN XILIN RIVER DISTRICT, INNER MONGOLIA

本文对内蒙古锡林河流域不同生境中蝗虫种类发生的情况进行了分析。经过系统取样和大面积扫网调查，共采集到蝗虫21种，这些种类在各生境中出现的情况，与生境的复杂程度存在很大的关系。在复杂的生境中，蝗虫种类最丰富。根据锡林河流域不同生境中蝗虫种类发生的情况，经过比较分析，我们认为在该区域存在的沙带生境是典型草原的“蝗虫库”。“蝗虫库”的存在，对牧业生产构成一定的潜在威胁。经存在度分析表明，一些常见的种类，生态分布幅度宽，同时，它们又是当地的优势种害虫，为害大，是重点防治对象。

This paper deals with the study on the compositions of grasshopper species of different habitats in Xilin River District, Inner Mongolia Autonomous Region, China- 21 species of grasshoppers are got in the 8 sample sites (5 habitat forms). The compositions of grasshopper species vary among these habitats. Grasshopper species are plentiest in the sand dune (sand belt) which locates at the north bank of Xilin River, about 40km long and 10km wide. Species living in the typical steppe can live in the sand dune, but some species only live in the sand dune. Sand dune in the region is the 'reservoir of grasshoppers' for typical steppe. The commonness species, also dominant species, are euryhabitat selection species,and they are important pests to pasture grasses.