摘要
基于景观生态学原理及遥感、地理信息系统技术,分析了1992—2009年江苏滨海湿地景观格局动态变化。结合"压力-状态-响应"模型、层次分析法及Delphi法,评价了湿地生态安全及其变化趋势。结果表明,1992—2009年间,研究区自然景观总面积显著减少,人工景观面积持续增加,大量湿地自然景观转为人工景观;景观破碎化程度逐渐加强,景观平均分维数呈递减趋势,受人类干扰程度不断加剧;Shannon多样性指数逐步增加,表明随着自然景观向人工景观转移,湿地景观类型丰富度在增加。湿地生态系统在3个时相均处于临界安全状态,病态和不安全等级的总比例逐年增加。
Based on landscape ecology, remote sensing and geographical information system, the authors analyzed the dynamic change of landscape pattern of Jiangsu costal wetland from 1992 to 2009. Combining the remote sensing derived information with Pressure - State - Response model, the authors also assessed AHP and Delphi methods, regional ecological security states and change trends. The experimental results show that the size of natural landscape has been reduced, while the manmade landscape tends to increase, accompanied by a transfer from wetland natural landscape to human landscape. The fragmentation degree has been intensified gradually, and the average fractal dimension tends to decrease, as a result of human intervention. The increased Shannon diversity metrics indicates more richness of wetland landscape types, which has resulted from the transfer of natural landscape to manmade landscape. The results also indicate that the wetland ecological system has been in critical security state, and the percentage of ill and insecure areas has been on the increase, so more attention should be paid to the landscape pattern improvement and ecological building.
出处
《国土资源遥感》
CSCD
北大核心
2014年第1期158-166,共9页
Remote Sensing for Land & Resources
基金
江苏省自然科学基金项目(编号:BK2010182)
地理空间信息工程国家测绘地理信息局重点实验室开放基金项目(编号:201109)共同资助
关键词
湿地
景观格局
生态安全
压力-状态-响应模型
遥感
wetland
landscape pattern
ecological security
Pressure - State - Response （PSR） model
remotesensing
