地理距离和地形差异对两个大型森林动态样地β多样性的影响

被引：11

作者：

卢品 ^{[1
,2
]}

金毅 ^{[2
]}

陈建华 ^{[1
]}

李铭红 ^{[1
]}

于明坚 ^{[2
]}

机构：

[1] 浙江师范大学生态研究所

[2] 浙江大学生命科学学院

来源：

生物多样性 | 2013年 / 21卷 / 05期

关键词：

亚热带常绿阔叶林; 热带森林; 古田山; Barro Colorado岛; 地形因子; 生态位过程; 扩散过程;

D O I：

暂无

中图分类号：

S718 [森林生物学];

学科分类号：

071012 ; 0713 ;

摘要：

β多样性度量群落物种组成随环境梯度的变化程度。为了了解地理距离和地形差异在连续空间中对β多样性的影响,本文比较研究了地形复杂的我国古田山24 ha亚热带常绿阔叶林样地和地形平坦的巴拿马Barro Colorado Island(BCI)50 ha热带森林样地植物群落的β多样性及其形成机制,在不同取样粒度(grain)上分析了地理距离和地形差异对β多样性的影响。我们采用1–Chao-Jaccard指数作为β多样性的度量指标,然后用Mantel和Partial Mantel等检验来分析地理距离、地形以及5种地形因子单独对β多样性的影响。结果表明,两个样地中群落的β多样性均具有粒度依赖性:粒度越大,β多样性越小;同时,两样地β多样性均受到距离和地形的显著影响,且随着粒度的增大,群落β多样性与距离的相关性呈相似的单调递增趋势。另外,地形对较复杂的古田山样地各粒度上植物群落β多样性的影响均较大,且主要由海拔和凹凸度两个因素造成;而地形对较平坦的BCI样地植物群落β多样性的影响则较小。本研究结果提示,生态位过程和扩散过程都是形成β多样性的重要机制。

引用

页码：554 / 563

页数：10

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