湘南红壤丘陵区土地生态安全动态评估——以永州市为例

Evaluation of Land Ecological Security in Red Soil Hilly Region of South Hunan——A Case Study of Yongzhou Ctity

文章选择典型的湘南红壤丘陵区永州市为研究对象,以生态足迹为模型,通过数据分析得出永州市2008-2012年的生态足迹、生态承载力、生态压力指数以及万元GDP生态足迹,实现对永州市土地生态安全状况的定量评估。研究表明,永州市近5年的人均生态足迹远远超出人均生态承载力,人均生态赤字表现为负值并有持续偏负的趋势,生态压力指数偏高且持续上升,永州市的生态系统已超负荷运转。据此,永州市急需采取相应的措施,力求降低生态足迹,改善生态环境。

In order to determine the degree of land utilization sustainable development in Yongzhou city and analyze the land ecological security of Yongzhou, the paper, based on the principle of ecological footprint, uses ecological footprint to research the city＇s land ecological security, and take Yongzhou city as the study area from 2008 to 2012. The results showed that Yongzhou city＇s ecological footprint surpassed the ecological capacity, the ecological deficit is negative, the trend of ecological tension in- dex is rising, and the ecosystem is in a overburdened condition. Accordingly, it is very urgent to take measures to reduce the ecological footprint of Yongzhou city.