摘要
以长白山区红松阔叶林为研究对象,采用空间代替时间的方法,对于不同年度进行中度择伐后形成的天然次生林,进行群落学调查,并根据树高划分为主林层、中林层、更新层,分析和探讨了经过人为干扰以后的28年恢复期间乔木种多样性的变化动态。研究结果表明,经人为干扰后,天然次生林内林分的乔木种丰富度和Shannon多样性指数变化均较小,林分均匀度指数在择伐后的5年间迅速减小,直至第28年为止始终小于原始林;在28年恢复期间物种丰富度指数、Shannon指数、Pielou指数、Simpson指数在不同高度层的分布格局变化均较大,且同原始林相比相差较大;林分不同层内乔木树种的多样性变化动态较复杂。
Community investigation of natural secondary broad-leaved Korean pine forest after selective cutting in different years were carried out using the method of substitution of space for time in Changbai Mountain. According to the height of tree, the tree layer was divided into canopy layer (height>15 m), secondary layer (15 m>height>1.5 m) and regeneration layer(height<1.5 m),the diversity dynamics of arborous species that had been restoring 28 years was studied. The results showed:(1) The arborous species richness and Shannon index of the stand had little change in natural secondary forest after human disturbance; (2) After being disturbed, the evenness index of the stand in secondary forests decreased rapidly within 5 years, and the evenness index is less than that of the virgin forest during 28 years period; (3) The spatial distribution pattern of species richness, Shannon index, Pielou's evenness index(Js) and Simpson dominance index on the different layer during the 28 years restoration period all had changed greatly, comparing with virgin forests;(4) The diversity dynamics of arborous species of different layer during the 28 years restoration period have complexity.
出处
《山地学报》
CSCD
2004年第1期59-65,共7页
Mountain Research
基金
中国科学院沈阳应用生态研究所创新项目(SCXMS0101)
国家"十五"攻关项目子课题(2002BA516A20
2001BA510B07)
教育部留学回国人员启动基金资助。~~
关键词
乔木
多样性
人为干扰
红松阔叶林
长白山
arborous species
diversity
human disturbance
broad-leaved Korean pine forest
Changbai Mountain