中文摘要：

为了解外来物种红耳龟（Trachemys scripta elegans）在海南入侵区的适宜栖息地特征,本文采用野外调查,结合3S技术（GIS、GPS和RS）和因子筛选的方法对海南万泉河琼海段红耳龟的生境选择进行了研究,并对该区域红耳龟生境适宜性及空间分布进行了分析。研究结果表明,红耳龟喜好选择在海拔0~15 m、人为干扰距离在200~400 m的水域且离水源距离不超过100 m的人工林区域栖息。GIS分析表明,2009年海南万泉河琼海段红耳龟的适宜生境面积达95.13 km2,占研究区总面积的5.66%;较适宜生境达153.32 km2,占研究区总面积的9.12%;不适宜生境1 432.58 km2,占研究区总面积的85.22%。通过对该区域红耳龟生境的适宜性分析研究,为有效防治和管理红耳龟的入侵、扩散提供基础数据及科学依据。

英文摘要：

To understand the characteristics of suitability habitat for the introduced red-eared slider turtle（ Trachemys scripta elegans） in Hainan we conducted a habitat selection study in Qionghai section of Wanquan River. We collected ecological factors such as elevation,slope,aspect,cover type,distance to water and human disturbance distance on 1 741 locations by tracking 27 individuals and analyzed the correlation of those ecological factors using Linear regression. We used Vanderploge and Scavia＇ s selectivity index to assess redeared slider turtle＇ s habitat selection for the different habitat parameters. We also evaluated the habitat suitability for this species by 3S technology（ GPS,RS,GIS） in the study area. We obtain the land-use data from field surveys and satellite images,and remote sensing data of Landsat TM digital image in 2009 by supervised classification. The results show that red-eared slider turtle preferred to area with an altitude of 0-15 m,the human disturbance distance to water from 200 to 400 m,and artificial forest distance to water below100 m. The analysis of GIS show that the most suitable habitat occurred in central and eastern Qionghai. Thesize of suitable habitat,less suitable habitat and unsuitable habitat were 95. 13 km2,153.32 km2and1 432. 58 km2,accounting for 5.66%,9.12% and 85.22% of the total study area,respectively. The results also implied that invasion potential of the red-eared slider turtle would be great in Qionghai section of Wanquan River. To some extent,the analysis on the habitat suitability can provide the basis data for preventing and controlling the red-eared slider turtle in Hainan.