基于GIS的稻田蜘蛛混合种群发生分析

在地理信息系统的支持下 ,对中国稻区 117个样点蜘蛛物种数与个体数进行空间插值 ,获得稻田蜘蛛混合种群数量专题地图和个体数量发生专题地图 .根据所得专题地图 ,分析了不同水稻种植区蜘蛛种群发生以及不同稻区的生态特征 .研究结果如下 :在北纬 35 .5°以南的水稻种植区域 ,蜘蛛种群与个体发生量较高 ,种群一般在 13种以上 ,个体数一般在每 10 0丛禾 10 0头以上 ;在北纬 35 .5°以北的水稻种植区域种群一般在 11种以下 ,个体数一般在每 10 0丛禾 47头以下 ;在北纬 35 .5°以南的水稻种植区域的年降雨量、年无霜期和 7月平均温度要高于在北纬 35 .5°以北的水稻种植区域 .在北纬 35 .5°以南的水稻种植区域的年日照时数要低于在北纬 35 .5°以北的水稻种植区域 .

Analysis of Status of Spiders Population of Rice Fields of China Based on GIS

Spiders data collected from 117 samples in rice fields of China during 1999 were interpolated spatially into digital images, and the thematic maps of the number of species and the number of spiders population were built by using GIS. Analysis of the number of species and the number of spiders population and ecological feature in different rice fields were made. The number of species in rice fields south of 35.5 degree north latitude is above 13 per 100 cluster. The number of species in rice fields north of 35.5 degree north latitude is below 11 per 100 per 100 cluster. The number of spiders population in rice fields north of 35.5 degree north latitude is below 47 per 100 cluster. The average annual rainfall, the average temperature in July and the average annual days of frost are higher at the area south of 35.5 degree north latitude than those at the area north of 35.5 degree north latitude.