摘要
为了解重庆市辖区县绿色基础设施(GI)景观破碎化及驱动机制,以成渝城市群重庆市辖区内22个区县为研究对象,运用形态学空间格局分析方法、景观破碎化指数、回归模型及聚类分析法,分析GI景观破碎化特征及驱动机制。结果表明:(1)2010—2018年,重庆市多数区县耕地、林地和水体面积显著减少,草地略有增加,建设用地显著增加;(2)重庆市多数区县GI网络结构要素中核心区和连接桥占比在80%以上,景观组成中耕地、林地和水体面积占比在90%以上;(3)GI景观破碎化指数均值为53.65%,整体破碎化趋势明显,核心区林地为土地利用变化驱动力维度的主导驱动因子,其次是核心区耕地、连接桥草地,人口增长率为城市扩张驱动力维度的主导驱动因子,其次是公路密度增长率与GI景观破碎化显著相关;(4)基于聚类分析将研究区分为GI高、中、低压力区县,GI高压力区县为核心区耕地、建设用地增长率与GI景观破碎化显著相关,GI中压力区县为连接桥林地、人口增长率与GI景观破碎化显著相关,GI低压力区县景观破碎化较低,无明显驱动因子。
In order to understand the landscape fragmentation and driving mechanism of green infrastructure(GI)in counties under Chongqing Municipality,the morphological spatial pattern analysis method,landscape fragmentation index,regression model and cluster analysis method were used to analyze the characteristics and driving mechanism of GI landscape fragmentation in 22 districts and counties under Chongqing Municipality.The results show that:(1)From^(2)010 to 2018,in most districts and counties of Chongqing,the area of cultivated land,forest land and water area decreased,grassland increased slightly,and urban land increased significantly;(2)The core area and connecting bridges in most districts and counties account for more than 80%of GI network structure elements,and the cultivated land,forest land and water area account for more than 90%of the landscape composition;(3)The average value of the GI landscape fragmentation index is 53.65%,and the overall fragmentation trend is obvious.The core area forest land,is the leading driving factor in the driving force of land use change,followed by the cultivated land in the core area and the connecting bridge grassland.The population growth rate is the leading driving force for urban expansion,followed by the highway density growth rate is significantly related to the fragmentation of GI landscape;(4)Based on cluster analysis,the research area were classified into counties with high,medium and low GI pressure.The growth rate of cultivated land and construction land in the core area of the county in the high-pressure area of GI is significantly correlated with GI landscape fragmentation;the connection bridge forest land and population growth rate of the county in the low-pressure area of GI are significantly correlated with GI landscape fragmentation;the degree of landscape fragmentation in the county in the low-pressure area of GI is low and there is no obvious driving factor.
作者
魏琪力
王诗源
李春容
王倩娜
罗言云
WEI Qi-li;WANG Shi-yuan;LI Chun-rong;WANG Qian-na;LUO Yan-yun(College of Architecture&Environment,Sichuan University,Chengdu Sichuan 610065,P.R.China;Center for Chinese Studies,University of California,Berkeley California 94704,U.S.A.)
出处
《西部林业科学》
CAS
北大核心
2021年第3期109-117,共9页
Journal of West China Forestry Science
基金
国家自然科学基金(31500581)
国家留学基金(201906240024)
成都市科技项目(2019-RK00-00261-ZF)资助。
关键词
绿色基础设施
景观破碎化
驱动力
形态学空间格局分析
土地利用动态度
重庆市
green infrastructure
landscape fragmentation
driving force
morphological spatial pattern analysis(MSPA)
land use dynamic index
Chongqing
