摘要
为探清滇中城市群土地利用转型对生态系统服务功能的影响,基于2000年、2010年、2020年3期Landsat TM/OLI遥感土地利用解译数据,运用土地利用动态变化模型、生态系统服务价值计算模型和土地利用转型生态贡献度研究了不同土地利用转型过程和生态系统服务价值的时空演变特征,并结合交叉敏感性系数模型定量评估了土地利用转型对生态系统服务价值的响应程度并划定敏感性分区。结果表明:(1)滇中城市群土地利用类型以林地、草地、耕地为主,建设用地持续扩张及耕地、水域、未利用地面积不断减少,草地和林地经历了“先减少后增加”的变化过程;(2)研究期间生态系统服务价值呈“先减少后增加”的趋势,地均生态系统服务价值高值区主要分布在滇池、抚仙湖和星云湖三大高原湖泊流域;(3)近20 a来,退耕还林、还草、还湖对生态系统服务功能改善的贡献度达49.10%,毁林开荒、围湖造田对林地、草地和水域的占用导致生态系统服务价值减少约2.65亿元;(4)耕地、林地、草地和水域向其他地类转型对生态服务价值的响应较为敏感,耕地、林地和草地与建设用地间转型的高生态敏感区集中在曲靖和楚雄,耕地与林地间转型的高生态敏感区分布较小,林地向草地和水域转型的低生态敏感区空间分布范围最广。综上,该区不同土地利用转型对生态系统服务功能影响显著。
In order to reveal the impact of land use transition on the ecosystem service function of urban agglomeration,central Yunnan was the focus of research.Based on the three-phase Landsat TM/OLI remote sensing interpretation data in 2000,2010 and 2020,the dynamic change model of land use,the ecosystem service value calculation model and the ecological contribution of land use transformation explores the temporal and spatial evolution characteristics of different land use transformation processes and ecosystem service value.It also combines the cross-sensitivity coefficient model to quantitatively evaluate the response degree and direction of land use transformation to ecosystem service value and delineate the sensitivity partition.The results show that:(1)the land use types of urban agglomerations in central Yunnan are mainly forestland,grassland and cultivated land.While the construction land continues to expand,the area of cultivated land,water area and unused land continues to decrease,the grassland and forest land have also experienced a process of change,first decreasing and then increasing;(2)during the study period,the ecosystem service value showed a trend of first decreasing and then increasing,the high value areas of average ecosystem service value were mainly distributed in the three plateau lake basins of Dianchi Lake,Fuxian Lake and Xingyun Lake;(3)in the past 20 years,returning farmland to forests,grasses,and lakes have contributed 49.10%to the improvement of ecosystem services,deforestation and reclamation of land and reclaiming land from lakes have taken up woodland,grassland and waters,resulting in a reduction of the ecosystem service value by approximately 265 million yuan;(4)the transformation of cultivated land,forest land,grassland and water area to other land types is sensitive to the value of ecological services.The highly ecologically sensitive areas of transformation between cultivated land,forest land,grassland and construction land are concentrated in Qujing and Chuxiong,the highly ecologic
作者
陈相标
丁文荣
李孝川
CHEN Xiangbiao;DING Wenrong;LI Xiaochuan(Faculty of Geography,Yunnan Normal University,Kunming 650500,China;Faculty of Education,Yunnan Normal University,Kunming 650500,China)
出处
《水土保持研究》
CSCD
北大核心
2022年第6期233-241,共9页
Research of Soil and Water Conservation
基金
国家自然科学基金“亚热带高原岩溶区陆地植被-湖泊湿地间的水文协同效应观测研究”(41761105)。
关键词
土地利用转型
生态系统服务价值
交叉敏感性
滇中城市群
land use transformation
ecosystem service value
cross-sensitivity
urban agglomeration in central Yunnan
