作　　者： ; ; ; ;

机构地区： 中山大学地理科学与规划学院

出　　处： 《应用生态学报》 2012年第11期3173-3179,共7页

摘　　要： 根据源-汇景观理论与生态系统服务理论,以城镇中心建设用地为扩展源,生态用地的生态系统服务价值贡献率为扩展阻力系数,对最小累积阻力模型(MCR)进行修正.基于此,模拟广州市新塘镇空间拓展过程,在保障生态安全格局的基础上,提出了重构城镇土地空间的优化路径.结果表明:1988—2008年,模拟的城镇空间发展方向与新塘镇实际发展进程及发展强度吻合性良好;模拟结果将新塘镇空间划分为高阻力、较高阻力、中阻力和低阻力4个片区,各区面积分别为80.84、78.90、24.26、61.88km2,城镇空间发展路径依次沿着低—中—较高—高阻力区进行;新塘镇生态适宜用地面积为159.74km2,建设适宜用地面积为86.14km2,生态冲突区面积为17.37km2,生态冲突区主要分布在较高阻力区(10.38km2)和高阻力区(6.99km2).修正后的MCR可有效揭示新塘镇土地空间分配与空间冲突的关系,并能科学有效地判定城镇空间拓展最优路径. Based on the source-sink landscape theory and the principles of ecosystem services, the minimum cumulative resistance （MCR） model was modified, where the urban center construction land was taken as the expansion source, and the contribution rate of ecological land ecosystem serv- ices value was considered as the resistance coefficient. With the modified MCR, the urban spatial expansion process of Xintang Town, Guangzhou City was successfully simulated, and, based on the protection of ecological security pattern, the optimum path for reconstructing urban land space was put forward. The simulated urban spatial expansion short path in 1988-2008 was in accordance with the real situation. By the modified MCR, the urban space was divided into four zones of high, higher, medium, and low resistance, with the area of 80.84, 78.90, 24.26, and 61.88 km2, re- spectively. The expansion path of the urban space was along the route from low to medium and then to high resistance zones successively. The land suitable for eco-protection and construction had an area of 159.74 km2 and 86.14 km2, while the ecological conflict area （ 17.37 km2 ） was mainly lo- cated in higher and high resistance zones, being 10.38 and 6.99 km2, respectively. The modified MCR could not only effectively reflect the distribution area of urban land use and the conflict rela- tionship between urban construction and ecological protection, but also reasonably judge the best developmental short path for urban spatial expansion.

关 键 词： 城镇空间拓展 最小累积阻力模型 生态系统服务价值 阻力系数 新塘镇

领　　域： [历史地理] [建筑科学]