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OALib Journal期刊
ISSN: 2333-9721
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天宝岩自然保护区森林景观格局与环境关系的尺度效应分析
DOI: 10.3724/SP.J.1145.2011.00638, PP. 638-644
Keywords: 森林景观格局,环境因子,cca,尺度效应,天宝岩国家级自然保护区
Abstract:
为揭示景观格局内演机制，在3s技术平台支撑下，借助tm遥感像图、植被分类图和二类调查数据，并引入cca（canonicalcorrespondenceanalysis）排序方法，对天宝岩森林景观格局与环境的关系及其尺度效应进行定量分析.结果表明：随着取样尺度的递减，排序轴各特征值之和呈增大趋势，依次为：3.137、3.349、3.484、4.660及4.848；而累积景观？环境解释量和景观？环境相关系数皆呈先增后减的趋势，分别在scale3和scale2达到最大；景观类型分布呈现较为明显的纬度梯度变化规律（纬度与第一轴的相关系数：-0.2019~-0.3789）和垂直分布规律（海拔与第一轴的相关系数：-0.3218~-0.4760），其中沿纬度梯度上分布的景观类型依次为：竹林、落叶阔叶林、针阔混交林、农田、常绿阔叶林、山顶矮曲林、常绿针叶林、泥潭藓沼泽、灌草丛；在较低海拔上分布的景观类型主要有竹林和农田，在较高海拔上分布着泥潭藓沼泽、灌草丛和山顶矮曲林；景观格局与环境关系具有尺度效应，环境因子对景观格局分布的影响程度随着尺度的变化而变化.图2表2参36
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