森林景观格局与环境关系及其尺度效应--以西洞庭湖区为例  

Relationship and Scale Effect between Forest Landscape Pattern and Environment——Taking West Dongting Lake Area for Example

作　　者：孙拥康[1] 李际平[2] 

机构地区：[1] 湖北省林业科学研究院,武汉430075 [2] 中南林业科技大学

出　　处：《东北林业大学学报》2014年第1期42-46,75,共6页Journal of Northeast Forestry University

基　　金：国家自然科学基金项目(30972362);中南林业科技大学研究生科技创新基金资助项目(2010sx04)

摘　　要：在ArcGIS平台支持下,提取西洞庭湖区15种森林景观类型和最具代表性的5个环境因子(海拔、坡度、坡位、坡向、土层厚度)数据库为数据源,引入典范对应分析法,对西洞庭湖区森林景观格局与环境的关系及其尺度效应进行了定量研究。结果表明:随尺度变化,各环境因子与排序轴的相关系数大小呈波动趋势,海拔相关性突出;结合CCA排序图,从排序轴特征值、影响程度和差异性看,森林景观格局与环境的关系都随尺度变化呈现出明显的尺度效应,取样尺度为S4时确定为最佳取样尺度。By ArcGIS and canonical correspondence analysis （CCA）, with database data of 15 forest landscape types and five environmental factors （altitude, slope degree, slope position, slope aspect and soil thickness） in west Dongting Lake area, the investigation was conducted to quantitatively study the relationship and the scale effect of forest landscape pattern and environment .With the scale variation , the correlation coefficient between each environmental factor and ordination axes presents a fluctuating trend, altitude correlation is particularly significant.Combining with the CCA ordination plot, the re-lationship of forest landscape pattern and environment shows obvious scale effect in the aspect of ordination axes eigenval-ue, forest landscape types or the difference, and thenS 4 sampling scale is determined as the best sampling scale.

关 键 词：森林景观类型 环境因子 典范对应分析 尺度效应 西洞庭湖区 

分 类 号：Q149[生物学—生态学]