孙才志,闫晓露,钟敬秋

• 1:辽宁师范大学城市与环境学院
• 2:辽宁省自然地理与空间信息科学重点实验室 (辽宁师范大学)

摘要(Abstract)：

以东北三省开发强度最大的辽河中下游———下辽河平原为研究对象,根据景观格局与生态安全的关系,通过景观干扰度指数和景观类型脆弱度指数构建景观生态安全指数,并借助地统计学和空间自相关模型分析的理论方法,对下辽河平原景观生态安全的空间分布特征、变异规律及空间结构进行了分析。结果表明:1)块金值C0所占比例在3个年份间有逐步上升的趋势,表明非结构性因素对景观生态安全演变的影响程度不断加深,但结构性因素(地形地貌、水文、土壤植被类型等)仍然对本区景观生态安全的空间分布起决定性作用;5 km采样间距内研究区景观生态安全具有高度的空间相关性;2)1989—2010年下辽河平原景观生态安全总体呈略微下降趋势,各安全分区的面积比例和空间结构均发生了明显变化;3)1989—2010年研究区景观生态安全Moran's I表现为一定程度的正相关,且相关程度呈略微下降趋势,研究区景观生态安全局部空间自相关和显著性水平均发生了明显变化。

关键词(KeyWords)： 地理学;景观生态安全;地统计学;空间结构;下辽河平原

Abstract:

Keywords:

基金项目(Foundation): 高等学校博士学科点专项科研基金项目(20122136110003)

作者(Author): 孙才志,闫晓露,钟敬秋

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