摘要
【目的】对成都市生态系统服务进行定量测算和梯度空间上的定位研究,了解生态系统服务能力强弱、空间分异及影响机制,为成都市以及类似的快速城市化地区的生态系统服务评估与供给提供政策思路。【方法】以梯度空间理论为基础建立成都市空间梯度环及空间梯度样带,运用生态系统服务价值评估模型和协调度模型,对成都市1990年、2000年、2010年、2020年生态系统服务价值、空间差异及协调度进行研究。【结果】①研究期间,成都市生态系统服务价值下降47.37亿元。②成都市生态系统服务价值整体呈退化趋势,中心向外围辐射上升的“中心-外围”空间圈层结构明显,主要向东南(ES)方向扩张,西北(WN)方向最稳定。③成都市在南北向(S)由中心向两翼扩张的趋势明显,生态系统服务价值由中心向两翼递增并呈南北对称分布。在东西向(H)呈现生态系统服务价值在中心城区逐步下降、临城部分地区快速下降、远郊生态功能区相对稳定的特征。④1990—2020年,成都市梯度空间样带上的综合协调度(P)降低2.43。【结论】①成都市生态系统服务价值和梯度综合协调度均具有明显的时空差异性以及建设用地扩张带来的显著影响。②生态系统服务空间变化方向和位置与城市扩张特征一致。③综合协调度(P)整体呈下降趋势,建设空间生态系统服务对综合协调度(P)影响越发显著。
【Objective】The paper aimed to conduct quantitative calculation and localization research on ecosystem services in Chengdu,to understand the strength,spatial differentiation and impact mechanism of ecosystem services,and to provide policy ideas for the evaluation and supply of ecosystem services in rapidly urbanizing regions.【Method】Based on the gradient space theory,a spatial gradient ring and a spatial gradient transect in Chengdu were established to evaluate the value of ecosystem services,spatial differences and coordination were studied by the evaluation model of ecosystem service value,and coordination degree model in 1990,2000,2010 and 2020.【Result】(i)During the study period,the value of ecosystem services in Chengdu decreased by 4.737 billion yuan.(ii)The overall ecosystem service value in Chengdu showed a degrading trend,and the‘centerperiphery’spatial circle structure radiating from the center to the periphery was obvious,mainly expanding in the southeast(ES)direction,and the northwest(WN)direction was the most stable.(iii)Chengdu has an obvious trend of expanding from the center to the two wings in the northsouth direction(S).In the east⁃west direction(H),the ecosystem service value gradually declined in the central urban area,rapidly declined in some areas adjacent to the city,and the ecological function ar⁃eas in the outer suburbs were relatively stable.(iv)From 1990 to 2020,the comprehensive coordination degree(P)on the gradient spatial transect in Chengdu decreased by 2.43.【Conclusion】(i)The value of ecosystem services and comprehensive coordination degree in Chengdu have obvious spatial and temporal differences and significant influence from the expansion of construction land.(ii)The spatial change direction and location of ecosystem services are consistent with the characteristics of urban expansion.(iii)The overall trend of comprehensive coordination(P)is downward.The construction of spatial ecosystem services has an increasingly significant impact on comprehensive coordin
作者
李政旸
徐佩
王玉宽
LI Zheng-yang;XU Pei;WANG Yu-kuan(Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610299,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《西南农业学报》
CSCD
北大核心
2023年第10期2077-2091,共15页
Southwest China Journal of Agricultural Sciences
基金
国家重点研发计划课题(2022YFF1301104)
中科院青年创新促进会项目(2021375)。
关键词
生态系统服务
协调度
梯度空间
成都市
Ecosystem services
Coordination degree
Gradient space
Chengdu
