摘要
西南岩溶区是举世公认的典型的生态环境脆弱系统之一，也是我国典型的极贫困代表区域之一。广西处于西南岩溶地区。岩溶面积为9．8×10^4km^2，占广西土地总面积的41％。本文以广西为例，采用生态足迹的理论和方法来测算广西区域生态安全状况，对1990-2003年广西岩溶生态环境的生态足迹、生态承载力、生态盈亏及生态压力指数进行测算分析并提出预测模型。研究结果：①广西生态足迹虽不新增加趋势，从1990年的0．6017hm^2增加到2003年的1．1378hm^2；②生态承载力呈不断下降趋势，从1990年的0．8204hm^2减少到2003年的0．6537hm^2；③生态盈亏从1990年生态盈余的0．2188hm^2下降到2003年的生态赤字达-0．4848hm^2，出现严重的生态赤字；④1990-2003年生态足迹压力指数由0．7334增加到1．7406，增长幅度巨大，从临界安全状态态到不安全状态。
The karst mountain areas in Southwest China are one of the universally acknowledged ecologically vulnerable systems and one of the representative poverty - stricken regions in China. Guangxi is located in the karst physiognomy blazon and the karst area is 98,000 square kilometers, accounting for 41% Guangxi＇s total acreage. Take Guangxi as a example,using the theory and method of the ecological footprint, combining the change of regional land use, resource environment, population, society and economiy, this paper calculated the ecological footprint, ecological carrying capacity, ecological surplus/deficit, ecological pressure index and 10,000 yuan of GDP in 1990 - 2003 of Guangxi. What is more, this paper has put forward the prediction models of different ecological footprints, ecological carrying capacity, ecological surplus/deficit and ecological safety change,and also has tested and assessed the ecological footprint demands of 10,030 yuan of GDP. The results show that：① The ecological footprint shows an increasing trend with varying degrees, from 0.6017 hm^2 to 1. 1378 hm^2. ② The ecological carrying capacity shows a decreasing tendency, from 0. 8204hm^2 to 0. 6537hm^2.③ The ecological surplus shows a decreasing tendency, from 0.2188 hrn2 to 0.4848 hm2,with a serious ecological deficit. ④ The ecological pressure index of the period 1990- 2003 increases from 0.83 to 1.74, and the growth scope is huge from critical safe state to not safe state.
出处
《中国人口·资源与环境》
CSSCI
2006年第4期129-133,共5页
China Population,Resources and Environment
基金
国家自然科学基金项目(70463001)
广西科学基金项目(桂科基0448034)资助
关键词
区域生态安全
生态足迹理论
动态变化
西南岩溶区
regional ecological safety
ecological footprint
dynamic change
quaniitative analysis
the Karst areas in Southwest China
Guangxi.
作者简介
张燕，硕士生，从事旅游生态经济模拟研究。
