高山草原蝗虫种群空间格局研究

以１９９３－１９９６年在甘肃省夏河县甘加高山草原蝗虫种群调查资料为基础，了草原蝗虫混合种群的空间格局及其聚集与扩散优势，并用聚块性指标研究了其聚集强度的时序变化。研究结果表明；蝗蝻呈集各随机分布，成虫随随机型分布，近似Ｐｏｉｓｓｏｎ分布、蝗 孵化初期呈现扩散地趋势，孵化盛期聚集趋势，而成虫则主要表现出扩散趋势。

Analysis on the Spatial Pattern of Grasshopper Population in the Alpine Prairie

Based on the investigations of grasshoppers population in the alpine prairie in Xiahe county of Gansu Province during 19931996, the spatial pattern of the grasshopper population was analysed and its aggregation and dispersion advantages were figured out. By using the aggregation indices, dynamics of aggregation intensity was described. The results showed that the nymphs present grouprandom distribution and the adults were random distribution. At the beginning of hatching, the nymphs were dispersion, and they were aggregation in the latter period. The adults were mainly dispersion.