摘要
对受到强干扰下的区域景观结构动态变化及其土地利用生态安全时空分异特征进行研究,是区域生态安全和可持续利用研究的重要组成部分。以建三江垦区15个农场为研究区,利用遥感手段提取研究区1992年、2001年和2010年的景观类型信息,定量分析了研究区景观结构变化特征;定量计算研究区不同尺度的景观稳定性,并结合DPSIR模型构建研究区土地利用生态安全综合评价指标体系;对15个农场的土地利用生态安全等级进行评价,并分析了其时空分异变化特征。结果表明:1992—2010年,各农场的景观整体组合特征大体分为三种类型,景观空间格局特征亦有显著变化。在时间分异上,创业农场、二道河农场和浓江农场的土地利用生态安全评价值和等级呈先下降后上升的态势,其他农场的土地利用生态系统安全值和等级都呈逐年上升态势。在空间分布上,1992年,等级相对较高的地区集中在中西部、西北部和东部;2001年,呈现两个带状分布;2010年,土地利用生态安全等级均提升,等级低的地区镶嵌其中。这种等级变化和时空分异特征体现了不同土地利用生态系统的稳定状态,即结构和功能对干扰的抗性和恢复性水平,并体现人类的土地利用行为对保障土地的可持续利用能力起到关键作用。
Research for the dynamically strong disturbance regional landscape structure and the spatiotemporal variation of land use ecological security is one of very important parts of regional ecological security and sustainable utilization study.We selected Jian Sanjiang land reclamation area which includes 15 farms as the study area.We used the remote sensing（RS）tools to get the types of landscape in 1992,2001 and 2010.We quantitatively analyzed the landscape structure characteristics changed of the study area and quantitatively calculated the landscape structure stability of each farms.We established the comprehensive evaluation indicator system based on the DPSIR model,evaluated and analyzed the eco-security level of land-use in each farm with the eco-security of land-use data.We analyzed the spatiotemporal variation of each farm.The results showed that three characters changed in the landscape components from 1992 to 2010.The landscape spatiaopattern characteristics of the study area changed dramatically.Land use ecological security evaluation values and ratings were dropped after the first upward trend in Chuang ye farm,Er daohe farm and Nong jiang farm over the time.And the values and ratings of the other farms showed the increasing trend.With respect to the spatial distribution,the distribution of high level farms concentrated in the mid-west region,northwestern and eastern in 1992;it was shown that two zonal distribution zones in 2001;the land-use ecological security levels of most areas have raised and the low-grade regional inserted in them in 2010.Thislevel of changes and spatial differentiation reflects the different land use ecosystem steady state（the structure and function of the level resistance to the interference）.It is reflected that the land use and human behavior play a key role in securing the ability of the sustainable land use.
出处
《水土保持研究》
CSCD
北大核心
2016年第4期48-54,共7页
Research of Soil and Water Conservation
基金
国家自然科学资助项目(41071346)
中央高校基本科研业务费(130714001)
关键词
景观结构
土地利用生态系统安全
景观稳定性
DPSIR模型
时空分异
landscape structure
land-use ecological system security
landscape stability
DPSIR model
spatiotemporal variation
