山西太岳山典型暖温带森林林隙更新多样性研究

以山西太岳山典型暖温带森林林隙为研究对象,用主分量分析方法对林隙特征指标进行分析,最终选定扩展林隙面积、林隙年龄、边缘木平均高度、边缘木活枝下高4个主要的数量化林隙特征指标,并应用一元线性模型分析了这4项指标以及林隙形成方式对林隙更新苗多样性的影响.结果表明:物种数和Shannon-Wiener多样性指数随扩展林隙面积增大而增大;在林隙形成初期,物种数和Shannon-Wiener多样性指数增大,林隙形成中期和后期,物种数和Shannon-Wiener多样性指数减小;其他林隙特征指标对物种数和Shannon-Wiener多样性指数的影响不明显;林隙干扰状况差异对Pielou均匀度指数影响不明显.

A study on regeneration diversity in gaps in the typical forest in warm temperate zone of Taiyue Mountain in Shanxi Province.

This paper studied the gaps of typical warm temperate forest in Taiyue Mountain in Shanxi Province.The authors choosed four gap characteristics indexes: gap area,gap age,average height of edge-trees and height under living branches of edge-trees.Through principal component analyses,these four indexes and the effect of formation on diversity of forest gap renewing seedlings are analyzed.The results showed that the species numbers and Shannon-Wiener diversity indexes increased with the expansion of gap area.They increased at the beginning of gap formation and reduced at metaphase and anaphase;other gap characteristics indexes had less effect on species numbers and Shannon-Wiener diversity;difference of gap disturbance had unobvious effect on Pielou evenness indexes.