喀斯特地区土地利用变化对生态服务价值的影响——以贵州省绥阳县为例

Analysis of Influence of Land Use Change on Ecosystem Service Value——A Case Stualy of Suiyang County in Guizhou Province

利用2000年、2005年、2010年3期绥阳县ETM/SPOT影像解译获得2000—2010年的土地利用变化数据,估算了绥阳县土地利用变化对生态系统服务价值的影响及其变化情况。结果表明:(1)研究期内耕地增加了782.49hm2,林地、荒草地、水域、未利用地分别减少了111.71,29.37,3.16,4.23hm2。(2)研究期间绥阳县土地利用的变化损害了该区域生态系统的生态服务功能,使生态服务价值净损失5.37×106万元,主要是由林地和荒草地面积减少,转变为农田引起的。生态服务价值变化率为-11.69,年动态度为-1.17。在空间上呈现出中南部变化率高于东部和北部的特点。(3)城镇化加快、人口压力增大、地域经济差异是形成生态服务价值时空差异的重要原因。

The impacts of land use change on ESV in Suiyang County from 2000 to 2005 and from 2005 to 2010 was studied based on land use maps of 2000, 2005, 2010, which were interpreted from the ETM/SPOT im- ageries. The conclusions were drawn as follows： （1） during the study period, cultivated land increased by 782.49 hm2, woodland, grassland, waters, unused land decreased by 111.7l, 29.37, 3.16, 4.23 hm2, re- spectively; （2） the ecosystem service values had been diminished due to the [and use change in 10 years, ESV decreased by 5.37 X 10s million yuan during 2000--2010,mainly because of the change of forest land and pas- ture into farmland, the rate of change was --11.69, annual dynamic was --1.17. South-central change was higher than the east and north in the spatial characteristics; （3） the accelerated urbanization, population pressures, and regional economic differences were the important reasons for the spatial and temporal differences of ESV