武陵山区生物多样性生态风险评价

武陵山区是我国生物多样性重点保护地区之一,该区生物多样性面临的生态风险因素较多,主要有干旱、山体滑坡泥石流、酸雨、人为干扰等.本文采用生态风险因子等级评价的方法,应用ArcGIS和Erdas分析工具,依据生态风险源风险等级,对武陵山区生物多样性面临的生态风险进行综合评价.结果表明,生态风险极高的地区位于湖北省恩施地区中南部、湖南省湘西地区大部以及贵州省铜仁东部局部地区.主要生态风险特点为存在一定人为干扰,天然植被较少,酸雨发生可能性大.因此发展过程中应当予以重视和保护生态风险高的地区,降低生物多样性的损失.

Biodioersity Ecologyical Risk Assessment in Wuling Mnontainous Area

The Wuling mountainous area is one of the important biodiversity rich reserves in China. The biodiversity here face many ecological risks, such as aridity, landslide, acid rain and human disturbance. The article uses ecological risk evaluation and AreGIS, Erdas technique to evaluate the risks of biodiversity in Wuling mountainous area. The results show that the area with highest risk is landslide in the western Hubei Province, main area in Xiangxi, Hunan Province. These high risk areas are around main roads and cities, lack in natural vegetation and high possibility of acid rain. Therefore, these areas should be focused in order to reduce the loss risk of biodiversity.