摘要
以重庆市丰都县为例,基于土地利用、DEM数字高程数据,利用粒度反推法和MCR模型对该县2005—2018年生态源地景观格局演变进行了研究,并分析了其与土地利用变化的关系。结果表明:丰都县2005—2018年土地利用变化显著,2005年生态源地选取最佳组分结构为1400m粒度,2018年为1600m粒度;2005年生态源地面积1286km2、27条生态廊道、34个生态节点,2018年生态源地面积1442.4km2、20条生态廊道、25个生态节点。2005—2018年研究区生态源地面积增加,对生态过程起促进作用,但空间破碎程度加大;生物流运行阻碍增强,对生态过程起抑制作用,总体上仍表现为土地利用变化改善了生态安全格局。
Based on land use and DEM data,this paper optimized the landscape pattern of Fengdu County in Chongqing by using particle size regression method and MCR model,and analyzed the relationship between landscape pattern and land use change.The results showed that:The land use change was significant from 2005 to 2018.In 2005,the optimal component structure was 1400 m particle size,and in 2018,it was 1600 m particle size.In 2005,Fengdu County had an ecological area of 1286 km2,a total of 27 ecological corridors and 34 ecological nodes.In 2018,it had an ecological area of 1442.4 km2,a total of 20 ecological corridors and 25 ecological nodes.From 2005 to 2018,the ecological source area increased,and the ecological resistance decreased,which promoted the ecological process.On the contrary,the degree of space fragmentation increased,which hindered the operation of biological logistics and inhibited the ecological process.However,the change of land use in the study area still improved the ecological security landscape pattern.
作者
张柳柳
张虹
ZHANG Liu-liu;ZHANG Hong(The Key Laboratory of GIS Application in Chongqing University,Chongqing Normal University,Chongqing 401331,China)
出处
《资源开发与市场》
CAS
2020年第12期1320-1325,1333,共7页
Resource Development & Market
基金
国家自然科学基金项目(编号:41807498)
重庆市教委科技项目(编号:KJQN201800525)。
关键词
景观格局
粒度反推法
MCR模型
生态源地
土地利用/覆被变化
landscape pattern
particle size inverse method
MCR model
ecological source area
land use/cover change
