基于变化轨迹探测的植被景观格局动态分析——以塔里木河下游生态输水区域为例  

Analysis of Vegetation Landscape Pattern Dynamics Based on Trajectory Change Detection: A case study of ecological water transportation in the lower reaches of Tarim River

作　　者：刘桂林[1,2,3] 艾里西尔.库尔班 玉米提.哈力克 段含明[5] Philipp Gartner Birgit Kleinschmit 阿布都米吉提.阿布利克木 牛婷[1,2] 

机构地区：[1]中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011 [2]中国科学院研究生院,北京100049 [3]中国科学院南京地理与湖泊研究所,江苏南京210008 [4]新疆大学资源与环境科学学院/新疆绿洲生态重点实验室,新疆乌鲁木齐830046 [5]西华师范大学国土资源学院,四川南充637002 [6]柏林理工大学景观建筑与环境规划研究所,德国柏林10623

出　　处：《中国沙漠》2012年第5期1472-1478,共7页Journal of Desert Research

基　　金：新疆维吾尔自治区自然科学基金项目(2010211A57);中德合作SuMaRio项目(01LL0918G);国家自然科学基金项目(30760050);德国Robert-Bosch基金会项目(32.5.8003.0063.0)资助

摘　　要：在遥感与GIS技术支持下,以2006、2007、2009、2010年Landsat-5/TM影像与2008年的CBERS/CCD影像为主要数据源,获得5a的植被/非植被类型图。在此基础上,提取并归纳5a间的植被变化轨迹:恒定植被、恒定非植被、转变为植被、转变为非植被、非稳定变化。利用景观格局分析软件FRAGSTATS 3.3计算了变化轨迹景观格局的3种景观指标。结果表明,2006—2010年植被面积减小,主要因为生态输水量减小、输水间隔较大,导致草本植被、乔灌木幼苗死亡;恒定非植被的比重最大,表明非植被类型是研究区的基质,其次是转变为非植被的比重,说明5a间植被的衰退程度要强于恢复程度;转变为植被与非稳定变化两种类型属于过渡性植被变化类型,受生态输水量、分布的制约严重;各种变化轨迹类型的形状规则较为稳定,其中以恒定非植被类型最稳定而非稳定变化类型最不稳定。Based on remote sensing and GIS technology, vegetation/non-vegetation in the lower reaches of Tarim River were classified from Landsat-5/TM images （2006, 2007, 2009, 2010） and CBERS/CCD images （2008）. Five kinds of vegetation change trajectories （stable vegetation, stable non-vegetation, changing in- to vegetation, changing into non-vegetation, unstable change） were subsequently categorized from different temporal trends of vegetation change. Then landscape patterns of vegetation change trajectories for 5 years from 2006 to 2010 were analyzed with software FRAGSTATS 3.3 from aspects of three landscape indices： Percentage of Landscape（PLAND）, Interspersion and Juxtaposition （IJI）, Area-Weighted Mean Fractal Di- mension Index （FARC_AM）. Results showed that vegetation area decreased because the survival rate of vegetation seedlings decreased caused by reduced ecological water transportation volume and prolonged eco- logical water transportation interval. PLAND of stable non-vegetation was the largest, which indicated that non-vegetation was the major landscape class in the study area. IJI of changing into vegetation and unstable change trajectories were relatively higher than IJI of others, which showed that they were highly sensitive to water condition and responded strongly to the volume and allocation of ecological water transportation. The shapes of five change trajectories were all relatively regular with lower FRAC_AM values.

关 键 词：植被景观格局 变化轨迹 生态输水 塔里木河下游 

分 类 号：X171[环境科学与工程—环境科学]