摘要
通过空间变化代替时间差异和样方法等手段,对浙江省马尾松林针叶(针叶林)、马尾松针阔叶混交林、中龄常绿阔叶林和近熟常绿阔叶林4种不同演替阶段森林群落的物种组成和多样性、群落间相似性进行了研究。结果表明,23个样地共记录维管植物53科105属170种。随着演替的进行,群落物种数、各层次的Shannon-Wiener多样性指数基本上呈现先下降后上升的趋势,并以针阔叶混交林最低,估计跟先锋物种的消失和后期物种的出现这一更替有关。随着演替的进行,各群落间的Jaccard相似性系数逐渐降低,其中针阔叶混交林和中龄常绿阔叶林之间的相似性系数最高,马尾松与近熟常绿阔叶林之间的相似性系数最低。群落主成分分析也得出相似的结果。群落之间的差异主要体现在物种组成尤其是乔木层的组成上;针阔叶混交林是物种丰富度和物种多样性较低的一个群落,但它与其它群落间的相似性较高,并已储存了常绿阔叶林中的大部分物种,对演替起着承前启后的作用。
The species composition and diversity,as well as the inter-community similarity of four successional forest communities in Zhejiang province,including coniferous forest(pine),coniferous(pine) and broad-leaved mixed forest,mid-aged evergreen broad-leaved forest and pre-matured evergreen broad-leaved forest,were investigated by chronosequences and quadrat methods.The results showed that,there were 170 vascular species belonging to 53 families,105 genera in the 23 plots.Along with the disappearance of pioneer species and appearance of later successional species,the trends of species richness and Shannon-Wiener index of three layers both decreased and then increased with the succession,and the coniferous and broad-leaved mixed forest had the lowest species diversity.The Jaccard similarity indices of four communities decreased along the successional sequence.Among them,the similarity index of pine coniferous forest and pre-matured evergreen broad-leaved forest was the lowest,and the principal component analysis showed the similar result.The differences among four communities were mainly presented in the species composition,especially that of tree layer.The coniferous and broad-leaved mixed forest had lower species richness and diversity,but it had higher similarity with other forest types,and stored most species of the later successional stage-evergreen broad-leaved forest,suggesting it is a key stage in the succession.
出处
《植物研究》
CAS
CSCD
北大核心
2011年第1期61-66,共6页
Bulletin of Botanical Research
基金
浙江省科技计划项目(2007C22084)
杭州市科技发展计划资助项目(2004113B050)
关键词
亚热带
森林演替
常绿阔叶林
群落组成
物种多样性
生态恢复
subtropical zone
forest succession
evergreen broad-leaved forest
community composition
species diversity
ecological restoration