锡林郭勒盟典型草原昆虫多样性分析

为典型草原害虫监测预警和生态治理提供理论依据，选取害虫发生相对严重的锡林郭勒盟7个旗县典型草原作为调查对象，采用Z字形扫网取样法对昆虫数量和种类进行调查，对昆虫尤其是主要昆虫蝗虫群落差异和多样性进行分析，并对蝗虫群落和环境因子进行冗余分析。结果显示，在7个典型草原区域中，正镶白旗、镶黄旗、阿巴嘎旗、西乌珠穆沁旗和锡林郭勒市的昆虫Margalef丰富度指数、Shannon-Wiener多样性指数和Pielou均匀度指数均较高，且这5个草原区域之间均差异不显著；在7个典型草原区域内共采集到草原蝗虫6科11属16种，种类较丰富，约占所有昆虫种类的20.00%；亚洲小车蝗Oedaleus asiaticus作为锡林郭勒盟典型草原蝗虫的优势种，在所有典型草原区域中的数量均高于其他蝗虫；镶黄旗和锡林浩特市的蝗虫种数最多，均为14种，而苏尼特左旗的蝗虫种数最低，为8种；植被覆盖度和海拔对蝗虫Margalef丰富度指数、Shannon-Wiener多样性指数和Pielou均匀度指数有正影响。锡林浩特市与镶黄旗的蝗虫群落相异性最小，相异性系数为0，与其他5个典型草原区域的蝗虫群落相异性也较低，相异性系数...

Analysis of insect diversity in typical steppe of Xilin Gol League

In order to provide theoretical guidance for pest monitoring and warning as well as ecological management in typical grasslands, seven counties in Xilin Gol League with relatively serious insect infestation were surveyed. The relevant insects were investigated by Z-shaped sweep sampling, while the differences and diversity of insect communities were analyzed, especially grasshopper communities. In addition, the redundancy analysis of grasshopper communities and environmental factors was carried out. According to the research results, the Margalef richness index, Shannon-Wiener diversity index and Pielou evenness index of insects found in Plain and Bordered White Banner, Bordered Yellow Banner, Abaga Banner, West Ujimqin Banner and Xilinhot City were higher in the seven typical steppe regions. However, there was no significant difference between the five regions. A total of 16 species of grasshoppers in 11 genera and six families were collected from the seven typical grassland areas, accounting for about 20.00% of all insect species. Specifically, Oedaleus asiaticus was the dominant species of grasshoppers in the typical grassland of Xilin Gol League, with its density higher in all typical grassland areas compared to other grasshoppers. The number of grasshopper species found in Bordered Yellow Banner and Xilinhot City was the highest, reaching 14. In contrast, the number of grasshopper species in Sonid Left Banner was the lowest (eight). The coverage and altitude of vegetation exerted positive effects on Margalef richness index, Shannon-Wiener diversity index and Pielou evenness index. The dissimilarity of grasshopper communities between Xilinhot City and Bordered Yellow Banner was least significant, with a dissimilarity coefficient of 0. There was also a low dissimilarity of grasshopper communities between Xilinhot City and other five typical grassland areas, and the dissimilarity coefficients ranged between 0.04 and 0.20. It indicated that the typical grassland of Xilinhot City covered most of the grasshopper communities in Xilin Gol League.