Zhao Yong-hua, Zhang Ling-ling, Wang Xiao-feng
Ministry of Education Key Laboratory of Western Mineral Resources and Geological Engineering, College of Earth Science and Resources, Chang' an University, Xi' an 710054, China.
Ying Yong Sheng Tai Xue Bao. 2011 Oct;22(10):2662-72.
Based on the investigation data of land use change and the services values of terrestrial ecosystems in China, this paper analyzed the variations of ecosystem services values and their differences at different scales in Shaanxi Province, and approached the effects of the requisition-compensation balance of cultivated land and the program of conversing cropland into forestland on the ecosystem services values as well as their dynamic variations in the Province from 2001 to 2006. In the study period, the total ecosystem services value in the Province had an overall increasing trend. The ecosystem services value of forestland accounted for more than 76.5%, and its increment occupied 97.5% of the total; whereas the ecosystem services values of arable land, grassland, and unused land decreased, and the decrement of the ecosystem services value of cultivated land accounted for 81.7% of the total. The services values of urban ecosystems in the Province in 2001-2006 all increased to some extent, with the largest increment in Yan' an City, followed by in Yulin City, and the smallest in Yangling District. The ecosystem services value in the Loess Plateau increased most obviously, with the increment accounted for 61.2% of the total, followed by in the Qinba Mountains, and the least in the Guanzhong Plain. The requisition-compensation balance of cultivated land in the Province did well, with the ecosystem services value presented an increasing trend. The program of conversing cropland into forestland increased the ecosystem services value most in the Loess Plateau whereas the least in the Guanzhong Plain.
基于中国土地利用变化及陆地生态系统服务价值的调查数据，本文分析了陕西省生态系统服务价值的变化及其在不同尺度上的差异，并探讨了耕地占补平衡和退耕还林工程对该省2001—2006年生态系统服务价值及其动态变化的影响。研究期内，该省生态系统服务价值总量呈整体上升趋势。林地生态系统服务价值占比超过76.5%，其增量占总增量的97.5%；而耕地、草地和未利用地的生态系统服务价值下降，其中耕地生态系统服务价值减量占总减量的81.7%。2001—2006年该省城市生态系统服务价值均有不同程度增加，延安市增量最大，其次是榆林市，杨凌区最小。黄土高原生态系统服务价值增加最为明显，增量占总增量的61.2%，其次是秦巴山区，关中平原最少。该省耕地占补平衡情况良好，生态系统服务价值呈上升趋势。退耕还林工程使黄土高原生态系统服务价值增加最多，关中平原增加最少。
