摘要
为了探究城镇扩张对生态系统服务价值的影响,采用热点分析法和时空地理加权回归模型(GTWR),对长江经济带城镇扩张强度与生态系统服务价值量的时空演变格局及其关联进行了分析。结果表明:(1)15 a间,长江经济带的年均城镇扩张强度约为0.02%,城镇扩张的热点区从下游长三角地区的东南部向长三角的中部和北部转移,并逐渐覆盖长三角的大部分地区。(2)2000—2015年长江经济带生态系统服务的总价值量下降了0.27%,其中供给服务、调节服务、支持服务和总服务价值量下降的热点区均集中在下游长三角地区,而文化服务价值量下降的热点区则分布在浙江省与江西省部分地区。(3)城镇扩张进程对长江经济带的文化服务价值的影响不显著,但对大部分地区生态系统的供给服务、调节服务、支持服务和总服务的价值量均产生显著的负面影响。城镇扩张对各类生态系统服务价值的负面影响具有时空异质性的特征,在进行长江经济带生态保护工作中应该采用差异化管理模式。
In order to explore the impact of urban expansion on ecosystem service values,the spatial and temporal evolution pattern of urban expansion intensity and ecosystem service values in the Yangtze River Economic Belt and its correlation were analyzed using the hot spot analysis method and the GTWR(geographically and temporally weighted regression)model.The results show that:during the past 15 years,the urban area of the Yangtze River Economic Belt had been expanding continuously,with the urban expansion intensity of 0.02%each year;the hot spots had been transiting from the southeast of the Yangtze River Delta to its central and northern parts,and gradually covered the whole Yangtze River Delta;from 2000 to 2015,the total value of ecosystem services had decreased by 0.27%in the Yangtze River Economic Belt,among which the hot spots of provision service values,regulation service values,support service values and total service values decline were concentrated in the Yangtze River Delta,while the hot spots of cultural service values decline distributed in some areas in Zhejiang Province and Jiangxi Province;the process of urban expansion had no significant effect on cultural service values,but it had significant negative effects on provision service values,regulation service values,support service values and total service values.The negative effects of urban expansion on ecosystem service values had the characteristics of spatial and temporal heterogeneity.Therefore,differentiated management mode should be adopted in the ecological protection of the Yangtze River Economic Belt.
作者
周晓艳
王诗琪
ZHOU Xiaoyan;WANG Shiqi(School of Resources and Environmental Sciences,Wuhan University,Wuhan 430079,China)
出处
《水土保持研究》
CSCD
北大核心
2021年第4期300-307,共8页
Research of Soil and Water Conservation
基金
国家自然科学基金“基于空间异质性和不确定性的城市扩展元胞自动机模型构建--以武汉城市圈为例”(41571384)。
关键词
城镇扩张
生态系统服务价值
热点分析
时空地理加权回归
长江经济带
urban expansion
ecosystem service value
hot spot analysis
geographically and temporally weighted regression
the Yangtze River Economic Belt
