地理研究

地理研究 ›› 2012, Vol. 31 ›› Issue (3): 461-470.doi: 10.11821/yj2012030008

• 地表过程研究 • 上一篇    下一篇

东洞庭湿地植被格局变化及其影响因素

雷璇1,2, 杨波3, 蒋卫国1,2, 杨一鹏4, Claudia Kuenzer5, 陈强1,2   

  1. 1. 北京师范大学地表过程与资源生态国家重点实验室, 北京 100875;
    2. 北京师范大学环境演变与自然灾害教育部重点实验室, 北京 100875;
    3. 湖南师范大学资源与环境科学学院, 长沙 410081;
    4. 环境保护部卫星环境应用中心, 北京 100094;
    5. 德国宇航中心遥感数据中心, 德国 慕尼黑 82234
  • 收稿日期:2011-01-15 修回日期:2011-07-15 出版日期:2012-03-20 发布日期:2012-03-20
  • 通讯作者: 杨波(1974- ),男,湖南张家界人,博士,湖南师范大学副教授,主要研究领域为资源环境遥感。E-mail:yb@hunnu.edu.cn
  • 作者简介:雷璇(1988- ),女,河北石家庄人,研究生,主要研究领域为湿地生态及环境遥感。E-mail:leixuan@mail.bnu.edu.cn
  • 基金资助:

    环境保护部公益性行业科研专项(200909113、201009021);国家自然科学基金(40701172、41001160);国家科技合作计划(2009DFA91710);北京师范大学自主科研基金资助

Vegetation pattern changes and their influencing factors in the East Dongting Lake wetland

LEI Xuan1,2, YANG Bo3, JIANG Wei-guo1,2, YANG Yipeng4, Claudia KUENZER5, CHEN Qiang1,2   

  1. 1. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China;
    2. Key Laboratory of Environmental Change and Natural Disaster, Beijing Normal University, Beijing 100875, China;
    3. College of Resources and Environmental Science, Hunan Normal University, Changsha 410081, China;
    4. Application Center for Satellite Environmental Monitoring, Ministry of Environmental Protection, Beijing 100094, China;
    5. German Aerospace Center(DLR), German Remote Sensing Data Center(DFD), Oberpfaffenhofen, 82234 Wessling, Germany
  • Received:2011-01-15 Revised:2011-07-15 Online:2012-03-20 Published:2012-03-20

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摘要： 东洞庭湖(也称东洞庭)湿地植被格局的变化特征及其影响因素的分析是该地区湿地植被保护与恢复策略制定的基础。基于美国陆地资源卫星Landsat TM/ETM+数据,应用决策树分类法分别提取东洞庭湖1999年、2002年、2006年三个时期湿地景观信息,通过转移矩阵法和质心迁移法对植被的时空演变分析。结果表明:(1)1993～2002年东洞庭湖芦苇、林地、苔草滩地面积均有所增加,芦苇增长速度最快,年均增长面积为28.93km2;2002～2006年林地面积迅速增加,年均增长面积为29.655km2,苔草面积有所减少,芦苇面积保持基本稳定;(2)东洞庭湖湿地植被质心呈现从林地—芦苇—苔草逐层靠近湖心的分布特点,1993～2006年三种植被类型的质心均不断向湖心迁移,其中以林地与芦苇的变迁更为显著。

关键词: 遥感, 东洞庭湿地, 植被, 驱动力

Abstract: The bases for the protection of wetland vegetation cover and for the design of vegetation recovery initiatives is an available vegetation cover framework,including the variational characteristics and the investigation of factors influencing vegetation variability.In this paper,using Landsat TM/ETM+ data,we developed a decision framework for the extraction of wetland landscape information from three periods for East Dongting Lake.We then performed analyses of the changes of vegetation on the basis of transfer matrix and the centriods shifting method.Results are shown as follows.(1) From 1993~2002,the areas of forested land,reed land,and carex covered area increased,among them the reed land increased fastest,with an annual growth of 28.93 km2.During 2002~2006,forested land increased rapidly,with an annual growth of 29.655 km2,while the carex area decreased,and reeds remained unchanged.(2) The distribution of centroids of forest,reed and carex in the East Dongting Lake wetland layer by layer are close to the lake center,and entroids of these three vegetation types ceaselessly shifted to the lake centre from 1993 to 2006,among which,changes of forest and reed were more remarkable.

Key words: remote sensing, the East Dongting Lake, wetland, vegetation, driving forces