摘要
基于多时段遥感数据资料,利用景观格局方法和区域土地利用指数模型,并结合生态功能区划,从时间和空间上对成都市1985—2006年的林地景观变化特征进行了分析.结果表明:研究时段内,成都市林地损失面积超过17000hm2,林地斑块格局特征变化复杂,中、小斑块的数量和面积变化显著,体现出林地剧烈的转化和破碎化过程.从林地区域分布特征来看,林地斑块在山地亚区面积最大,约占研究区总面积的70%;平原亚区斑块数量最多,占总数的70%左右;全市林地面积变化速度最快的时期为1985—1995年,其中以山地亚区的林地面积减少速度最快;不同时段各生态功能亚区林地的相对变化率也不同.从林地的转化方向看,林地的转出、转入类型均以耕地和草地为主,林地在2000—2006年稳定性最高.促使林地景观格局时序变化的驱动力主要是生存型经济福利驱动、环境安全驱动和快速城市化过程,而自然生态条件、社会经济地域分工与布局则是林地景观空间变化的重要约束因子.
Based on the remote sensing data of Landsat TM （1985,1995,and 2000） and CBERS （2006）,and by using landscape pattern method and index model of regional land use change in combining with eco-function regionalization,this paper analyzed the dynamic characteristics of forest landscape in Chengdu City in 1985-2006. In the study period,over 17000 hm2 of forest land lost,and the number and area of small-and medium-size patches changed significantly,indicating the apparent conversion and fragmentation of forest land. Forest land was mainly distributed in mountainous area,accounting for 70% of the total. In contrast,more number of patches was found in plain region,amounting to 70% of the total. The most rapid change of forest land area occurred in 1985-1995,especially in mountainous region. The relative change rate of forest land area in different eco-function regions also varied in different periods. Forest land,converted to or converted from,was mainly related to cropland and grassland. In 2000-2006,forest land was quite stable. Survival-oriented economic welfare,environmental security,and fast urbanization process were the main driving forces of the temporal dynamic change of forest landscape,whereas geographical division and socio-economic layout were the main constraints to the spatial dynamic change of forest landscape.
出处
《应用生态学报》
CAS
CSCD
北大核心
2010年第5期1081-1089,共9页
Chinese Journal of Applied Ecology
基金
国家"十一五"科技支撑计划项目(2006BAD03A06)资助
关键词
林地
景观变化
特征
成都市
面积
斑块
forest land
landscape dynamics
characterization
Chengdu City
area
patch.
