摘要
土地利用变化和生态系统服务价值一直是生态学研究的重点之一。本文基于2000、2010和2020年宜宾市遥感影像图,采用GIS制图和面积转移矩阵等方法分析了2000—2020年宜宾市土地利用变化及其生态系统服务价值时空效应。结果表明:(1)近20年来,宜宾市土地利用类型转换面积以耕地、林地和建设用地为主,建设用地面积增速呈现上升的趋势,2000—2010年与2010—2020年土地利用综合动态度分别为0.32%和0.31%;(2)生态系统服务价值在时间序列上呈现先降低后回升的趋势,总价值从490.64×10^(8)元增长到491.24×10^(8)元,其中林地、耕地和水域的贡献率最大;在空间分布上,单元格生态系统服务价值主要以中和较高等级区域为主,低等级区域主要集中于宜宾市主城区和南溪区(建设用地为主)。(3)生态系统服务价值聚类分布具有显著正相关性,H-H聚类与H-L聚类的生态系统服务价值增值区域主要分布在耕地转为林地的区域,L-L聚类与L-H聚类的减值区域则主要分布在林地转为耕地与建设用地的区域。本研究通过直观清晰的展现土地利用与生态系统服务价值的时空变化,有助于揭示两种变化之间的关系,并为指导生态环境建设提供科学依据。
Land use change and ecosystem service value have always been one of the ecological research focuses.In this paper,the spatial-temporal effects of land use change and ecosystem service value in Yibin city from 2000 to 2020 are analyzed by GIS mapping and area transfer matrix,which is based on remote sensing images of Yibin city in 2000,2010 and 2020.The results are as follows:(1)In the past 20 years,the transfer area of land use type in Yibin city has been dominated by cropland,forestland and construction land,with the growth rate of construction land showing an upward trend;the comprehensive dynamic values of land use from 2000 to 2010 and from 2010 to 2020 were 0.32%and 0.31%,respectively;(2)The value of ecosystem service has presented a trend of decteasing first and then increasing in the time series;the total value has increased from 490.64×10^(8) yuan to 491.24×10^(8)yuan,to which the forest land,water area and cultivated land have contributed the most;in the spatial distribution,the ecosystem service value of the unit is mostly centered on the middle and the higher grade areas and the low-grade areas are mainly concentrated in the main urban areas of Yibin and Nanxi District(mainly construction land);(3)The cluster distribution of ecosystem service value has a significant positive correlation;the value-added areas of H-H Cluster and H-L Cluster are mainly distributed in the areas transfered from cropland to forestland,while the value-decreased areas of L-L cluster and L-H cluster are mainly distributed in the areas transfered from forestland to cropland and construction land.The visual and clear presentation of the temporal and spatial changes in this study is helpful to reveal the relationship between land use and ecosystem service value,and provide scientific basis for guiding the construction of ecological environment.
作者
何治学
王磊
罗君
刘辉
邓青春
杨海青
HE Zhi-xue;WANG Lei;LUO Jun;LIU Hui;DENG Qing-chun;YANG Hai-qing(College of Life Science,China West Normal University,Nanchong Sichuan 637009,China;Sichuan Provincial Engineering Laboratory of Monitoring and Control for Soil Erosion on Dry Valleys,China West Normal University,Nanchong Sichuan 637009,China;School of Geographical Sciences,China West Normal University,Nanchong Sichuan 637009,China;Liangshan Soil Erosion and Ecological Restoration in Dry Valleys Observation and Research Station,Xide Sichuan 616753,China)
出处
《西华师范大学学报（自然科学版）》
2023年第4期350-357,共8页
Journal of China West Normal University(Natural Sciences)
基金
西华师范大学科研启动项目(18Q020,18Q033)。
关键词
宜宾市
土地利用变化
生态服务价值
时空效应
空间统计
Yinbin city
land use change
ecological service value
spatial-temporal effects
spatial statistics
