信宜市土地利用变化对生态服务价值的影响

Influences of Land Use Changes on Ecological Service Values

土地利用变化与生态系统服务价值相互影响、相互制约,定量研究土地利用变化对生态系统服务价值的影响,可为经济社会和生态环境的协调发展提供参考依据。利用单一土地利用动态度模型分析了1996～2007年广东省信宜市土地利用的变化情况,参考生态系统服务价值系数,对信宜市生态服务价值进行了定量研究。结果表明信宜市土地利用变化主要体现为大量的林地转化为园地和建设用地,林地减少了4 617.92 hm2,园地和建设用地分别增加了4 145.83和467.18 hm2,土地利用的生态系统服务价值呈逐年下降的趋势,从1996年的501 443.64万元减少到2007年的498 176.70万元,减少了3 266.94万元,说明目前信宜市经济社会的发展以损坏生态环境为代价,应在今后土地利用规划中着重保护生态服务价值高的林地,提高生态系统的服务价值,实现信宜市生态环境和经济社会的可持续发展。

Land use changes and ecological service values can influence and restrict each other,so quantitative studying influences of land use changes on ecological service values would provide references for the harmonious development of economic society and ecosystem.Using single land use dynamic attitude model to analyze the land-use changes of Xinyi City in Guangdong Province from 1996 to 2007,and the ecosystem service value of the Xinyi City was quantitatively studied according to the ecological service value index.The results showed that the land-use changes of Xinyi City were mainly embodied in lots of forest transferring to garden and construction land.The forest area reduced by 4 617.92 hm2,but the area of garden and construction land increased by 4 145.83 hm2 and 467.18 hm2,respectively.The ecosystem service value of land use decreased year by year,and it was dropped from 5 014.436 4 million yuan in 1996 to 4 981.767 0 million yuan in 2007,32.669 4 million yuan was reduced.Therefore,the results indicated that the development of economic society in the Xinyi City has taken a high damage of the environment as a cost at present,so it should focus on protection of forest,which have high ecological service value,in future land use planning to improve the service value of the ecosystem and realize sustainable development of economic society and environment in Xinyi City.