煤炭开采对矿区农田生态系统生态服务功能影响评价

Influence Assessment of the Coal Mining on the Ecological Service Functions of Agro-ecosystems in the Mineral Zone

为揭示煤炭开采对矿区农田生态系统服务功能的影响机理,综合应用直接费用法、影子工程法、替代费用法等,对徐州矿区正常、老稳沉、新稳沉、未稳沉、复垦〈3 a、复垦3~6 a、复垦6~10 a和复垦〉10 a等8种不同类型农田生态系统服务价值进行了定量估算。结果表明：煤炭开采对农田生态系统服务价值变化的扰动在时间序列上呈＂U＂型分布;不同类型农田生态系统服务功能结构基本一致,大气调节、社会保障和初级产品提供贡献了农田生态系统服务价值的90%;沉陷盆地的农田生态系统服务价值具有明显的空间分布规律性;经过复垦的农田生态系统服务价值随着复垦年限增加而提高。

The impact of the ecological service functions of agro-ecosystems as affected by coal mining was evaluated with market value,shadow price and replacement evaluation.We quantitatively estimated eight different agro-ecosystems in the Xuzhou mining region,including normal,old stable subsidence,new stable subsidence,unstable subsidence, 3-year reclamation,3-6-year reclamation,6-10-year reclamation, 10-year reclamation.The results of our analysis indicated the disturbance by coal mining caused the agro-ecosystem ecological service values to change in a ＂U＂ curve over time.Different types of cropland ecosystem had the same ecosystem service function structure,more than 90% of cropland ecosystem service value provided by air regulation,social security and primary production.Different parts of the subsidence through agro-ecosystem showed clear spatial variations.As the reclamation process was proceed over time gradually,the ecosystem service functions recovered significantly.