山西太岳山典型暖温带森林林隙更新多样性研究

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

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.

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.