武汉市城市用地扩张对生态系统服务的时空影响
朱晓南1,2, 刘艳中1, 陈 勇1,2, 张 祚3, 宋改凤1,2

(1.武汉科技大学 资源与环境工程学院, 武汉 430081; 2.冶金矿产资源高效利用与造块湖北省重点实验室, 武汉 430081; 3.华中师范大学 公共管理学院, 武汉 430079)

生态系统服务; 城市用地扩张; 时空影响分析; 武汉市

Effect of Urban Land Expansion on Spatiotemporal Ecosystem Service in Wuhan
ZHU Xiaonan,2, Liu Yanzhong1, Chenyong1,2, ZHANG Zuo3, SONG Gaifeng1,2

(1.School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; 2.Hubei Key Laboratory of High-Efficiency Utilization and Agglomeration of Metallurgical mineral Resources, Wuhan 430081, China; 3.College of Public Administration, Central China Normal University, Wuhan 430079, China)

ecosystem service value; urban expansion; spatial analysis; regression analysis; Wuhan City

备注

针对城市用地扩张对生态系统服务影响研究缺乏空间影响因素(坡度、高程、梯次)的分析,而导致无法以改变城市用地扩张的空间分布来减少ES损失的问题,以武汉市为例,定量计算区域各生态系统服务功能价值及城市用地扩张的时空变化特征,探究了城市用地扩张对生态系统服务的时空影响特征。结果 表明:武汉市ESV高值和极低值区域在武汉市中部交错分布,受城市用地扩张影响最高,ESV极低值区域不断扩大,逐渐扩散至西部和东部区域; 近25年来,城市用地扩张面积不断增加,在1990—2005年扩张速度较为稳定,在2005—2015年扩张速度迅速增加。研究认为武汉市城市用地扩张面积对各生态系统服务功能均起主要影响作用,城市扩张侵占地类变化起次要影响作用,扩张高程影响程度较大,扩张距离影响程度较低,扩张坡度仅影响食物生产和保持土壤。武汉市在未来的城市用地扩张中,应控制中心城区的范围,在距市中心较远的地区建立新的卫星城。

In view of the problem that the loss of ecosystem service cannot be reduced by changing the spatial distribution of urban land expansion, because the study on the influence of urban land expansion on ecosystem services lacks of spatial factors(slope, elevation and echelon), we selected Wuhan as a case example to calculate the value of important ecosystem services and the temporal and spatial variation characteristics of urban land expansion, and explore the spatial and temporal influence feature of urban land expansion on ecosystem services. The results were as follows. The regions with high ecosystem service value(ESV)or low ESV staggered in the central part of Wuhan, which was most affected by urban land expansion, and the area with extremely low value of ESV was expanding and gradually spreading to the western and eastern regions. In the past 25 years, the area of urban land expansion had continued to increase. In the period 1990—2005, the urban land expansion rate was relatively stable. In the period 2005—2015, the urban land expansion rate increased rapidly. It can be seen that the urban expansion area has played a major role in the ecosystem service. Urban expansion category has a secondary impact. The degree of expansion elevation has a greater impact, and the degree of expansion has a lower degree of influence. The degree of expansion elevation is greater, and the degree of expansion distance is less affected. The expansion slope only affects food production and soil conservation. In the future expansion of urban land use in Wuhan, the scope of the central urban area should be controlled and new satellite cities should be built in the area far from the city center.