基于生态压力指数的商洛市土地生态安全研究

摘要

The per capita ecological footprint and biological capacity from 2007 - 2011 in Shangluo were calculated by applying the ecological footprint principle and the ecological tension index method ;and the ecological safety status of land therein in the same period were classified into different grades .The findings show that the ecological safety status of land is in “safer” grade and that the ecological tension index in Shangluo features increase first and then decrease .These demonstrate that the yield of biologically productive land of Shangluo has been increasing year after year and that the overall ecological safety status is good .%应用生态足迹原理和生态压力指数方法，对商洛市2007-2011年的人均生态足迹和人均生态承载力进行了计算，并对同时期的土地生态安全状况进行了等级划分。结果显示，商洛市的土地生态安全处于“较安全”等级，生态压力指数呈先增加后减小的变化特征，说明商洛市生物生产性土地产出在逐年增强，土地生态安全状况总体较好。