摘要
以长沙市为例,研究了湘中红壤丘陵区土地利用变化对生态系统服务价值的影响.同时,参照相关研究成果制定了长沙市生态系统服务价值系数表,计算并研究了长沙市生态系统服务价值的变化.结果表明:研究期内,研究区林地、草地、湿地和未利用地面积减少,林地面积减少最多,耕地、水域和建设用地面积增加,耕地增加最多;研究区生态系统服务价值下降了1483.14×106元,年变化率为-0.41%,建设用地快速扩张,价值系数较高的林地面积大幅减少是造成这一结果的主要原因;敏感性指数分析表明,生态系统服务价值对所制定的价值系数缺乏弹性,研究结果可信.湘中红壤丘陵区生态系统相对脆弱,在调整该区土地利用结构时应充分考虑土地利用的生态效益,以减缓生态系统服务价值的下降趋势.
Ecosystem services value （ESV） and land use/cover change （LUCC） are hot issues in the field of eco-environment sustainable development. It is of great significance to conduct research on the change of ecosystem services value based on land use change. Changsha was chosen as the study area to analyze the variety of ESV based on land use change in the red soil hilly region of Central Hunan Province. Ecosystem services value coefficients were estimated. The results showed that from 1986 to 2000, the area of woodland, grassland, wetland and unused land decreased, while cropland, water and construction land increased. Woodland decreased the most and cropland increased the most. The total ESV of the study area decreased by 1483.14 × 10^6 RMB, at an annual rate of -0.41%. The decrease was attributed to the rapid increase of construction land and large decrease of woodland which has a relatively high value coefficient. The sensitivity analysis indicated that the ESV lacked elasticity on value coefficients, and the results are credible. The ecological environment in the red soil hilly region of Central Hunan Province is relatively fragile ; it is necessary to pay more attention to the ecological benefits when adjusting the land - use structure to mitigate the downtrend of ESV in these areas.
出处
《环境科学学报》
CAS
CSCD
北大核心
2009年第8期1788-1792,共5页
Acta Scientiae Circumstantiae
基金
"十一五"国家科技支撑计划(No.2006BAD003A1704)~~
