文献类型：期刊文献

中文题名：南亚热带常绿阔叶林不同大小和发育阶段林隙的树种多样性研究

英文题名：Tree species diversity in gaps of different sizes and developmental stages in lower subtropical evergreen broadleaved forest,South China.

作者：臧润国[1] 王伯荪[2] 刘静艳[2]

第一作者：臧润国

机构：[1]中国林业科学研究院森林生态环境与保护研究所;[2]中山大学生命科学学院

年份：2000

卷号：11

期号：4

起止页码：485-488

中文期刊名：应用生态学报

外文期刊名：CHINESE JOURNAL OF APPLIED ECOLOGY

收录：CSTPCD;;Scopus;CSCD:【CSCD2011_2012】；PubMed;

基金：国家自然科学基金资助项目!(3960 0 0 2 4 )

语种：中文

中文关键词：林隙;树种多样性;南亚热带;常绿阔叶林

外文关键词：Gap dynamics, Tree species diversity, Lower subtropical evergreen broadleaved forest.

分类号：S718.5

摘要：分析了南亚热带常绿阔叶林不同大小和发育阶段林隙内树种多样性的变化规律 .结果表明 ,在南亚热带常绿阔叶林中 ,多样性指数在 <40 0m2 的林隙中变化不大 ,但在 40 0～ 5 0 0m2 的林隙中达到最大 ,而在 5 0 0～60 0m2 的林隙中最小 ,在 >60 0m2 的林隙中又有所增大 .树种多样性指数随林隙年龄的变化趋势是中间高两端低 ,即在 2 0～ 5 0年期间的多样性最大 ,其次是 2 0年以下的 ,5 0年以后的多样性相对最小 .林隙更新层中树种多样性指数在 5 0 0～ 60 0m2 的林隙中达到最大 ,在 >60 0m2 和 2 0 0～ 3 0 0m2 的林隙中最小 .林隙更新层树种多样性指数在林隙形成最初的 10年内达到最大值 ,但随着林隙年龄的增加 ,总体上表现出下降趋势 ,在 3 0～ 40年和 5 0～ 60年左右又分别形成两个相对的峰值 .物种丰富度的变化趋势总体上与树种多样性指数相一致 .不同大小和发育阶段的林隙通过其生态因子的改变 ,对不同树种的更新起到了不同的作用 ,从而使得不同大小和发育阶段的林隙中树种的多样性特征不同 .
The change pattern of tree species diversity in gaps of different sizes and developmental stages in the lower subtropical evergreen broadleaved forest was analyzed in this paper. The species diversity index(Shannon Wienner) did not change in the gaps with a size of<400m 2,reached the highest in those with a size of 400～500m 2 and the lowest in the gaps of 500～600m 2 size, and increased in those with a size of >600m 2.The index was the highest in the middle period of 20～50 years, secondly high within 20 years, and lowest after 50 years of gap formation.The species diversity in regeneration layer(H<1 5m) reached a peak in the gaps with a size of 500～600m 2,and the lowest values occurred at the gaps with a size of >600m 2 and 200～300m 2.Species diversity index in the regeneration layer reached the highest in the first 10 years after gap formation,then revealed a general trend of decreasing, but two relative peaks were formed in the gap ages of about 30～40 years and 50～60 years,respectively. The general trends of species richness were correspondent with those of species diversity index.Gaps of different sizes and ages had a strong influence on the tree species regeneration through changes of ecological factors in gaps, thus,tree species diversity was different in gaps of different sizes and ages. Gap is one of the most important mechanisms for the maintenance of tree species diversity in the lower subtropical evergreen broadleaved forest.