【摘要】 根据不同时期的Landsat TM卫星遥感图像,分别提取海南坡鹿Cervus eldi hainanus栖息地海南大田国家级自然保护区及周边地区的归一化植被指数(Normalized Difference Vegetation Index,NDVI)。1991年保护区和周边地区的NDVI平均值分别为0.2485和0.291,而2001年的NDVI平均值分别为0.1272和0.0827,表明海南大田国家级自然保护区和周边地区的植被覆盖均下降,且周边地区植被覆盖下降幅度较大。保护区植被覆盖的下降是植被改造的结果,有利于坡鹿及栖息地的保护与发展;保护区周边地区植被覆盖下降是垦荒和采伐等人为干扰所致,是导致坡鹿栖息地丧失或破坏的重要原因。人类活动是植被覆盖变化的主要因素。建议自然保护区的规划应为濒危物种保护的未来留下空间。更多还原

【Abstract】 According to different remote sensing images of Landsat TM,normalized difference vegetation indices(NDVI) of Hainan Datian national nature reserve and circumjacent areas,which Hainan eld’s deer Cervus eldi hainanus inhabited,were worked out.NDVI average values of the reserve and peripheral areas were 0.2485 and 0.2915 in 1991;and those were 0.1272 and 0.0827 in 2001.The results showed that vegetation covers of both the reserve and circumjacent areas were decreased,and the latter was more dropped.Vegetation cover changes were mostly resulted from human activities.Resulted from vegetation rebuilding,descending of vegetation cover of the reserve was in favor of conservation and development of Hainan eld’s deer and their habitats;and decreasing of vegetation cover of circumjacent areas should have mostly attributed to such man-made disturbances as cultivation and deforestation.It is supposed that enough spaces must be considered for the conservation of endangered species in the future.更多还原