关键词: 榆树疏林, 人类活动, 土壤环境, 植物多样性

Abstract: Based on the 2003-2009 field survey data of white-backed planthopper Sogatella furcifera at its early immigration stage in Xiushan County of Chongqing, and by using geographical information system (GIS) and traditional spatial analysis methods, this paper studied the spatial distribution pattern and its dynamics of the planthopper in the county. In 2003-2009, the S. furcifera population within the county presented an obvious aggregated spatial distribution, and the inverse distance weighted interpolation figures showed that the aggregation center and distribution pattern differed in different years. Overall, S. furcifera population more aggregated in the middle area of the county, including Guanqiao, Guanzhuang, and Pingkai towns, with the aggregation center there in four of the seven years, but less aggregated in surrounding mountain areas, only with the aggregation center in the south of the county in 2007, in the east of the county in 2008, and in the north and west of the county in 2009.

Key words: Elm sparse woods, Human activity, Soil environment, Plant species diversity