Disturbance regime changes the trait distribution, phylogenetic structure and community assembly of tropical rain forests
Disturbance regime changes the trait distribution, phylogenetic structure and community assembly of tropical rain forests
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干扰机制改变了热带雨林的性状分布、系统发育结构和群落组装
DOI：
10.1111/j.1600-0706.2011.19992.x
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发表时间：
2012-08-01
期刊：
影响因子：
3.4
通讯作者：
He, Fangliang
中科院分区：
文献类型：
--
作者：
Ding, Yi;Zang, Runguo;He, Fangliang
功能群落生态学和系统发育生物学的融合迅速增加，增加了我们对群落组装的理解。然而，使用系统发育和特征方法的研究主要是在原始森林中进行的，对受人类干扰的社区的研究较少，而随着原始森林的退化，这些社区在提供生态系统服务方面发挥着越来越重要的作用。我们使用的数据从18个1公顷的地块在热带原始森林和次生林不同的干扰历史（伐木和轮垦）和植被类型（热带低地和山地森林）在海南岛，中国南部。比较了11个功能性状在6种林型中的分布。我们使用了一个零模型的方法来评估干扰制度的变化的影响，在不同的干大小（树苗，乔木，和成年树）和空间尺度（10-50米）的响应和效果性状和社区系统发育结构。我们发现，在高度干扰的低地网站与其他森林类型的功能性状的分布显着差异。许多个体在高度干扰的低地网站落叶，多刺，与非肉质果实和种子分散被动或风，低SLA。共存物种的反应特征聚类在所有的网站，除了高度干扰的低地网站的均匀性是显而易见的。不同林型间幼树和乔木层效应性状的分布不同，但各林型间成木效应性状值随空间尺度的增大聚类性增强。系统发育聚类占主导地位的所有大小类和空间尺度的高度干扰的低地网站，在其他森林类型的均匀度。高度干扰可能导致非生物过滤，产生一个由具有适应干扰特征的密切相关物种主导的群落，其中生物相互作用发挥相对较小的作用。在轻度干扰和古老的森林，多个过程同时驱动的社区组装，但生物过程占主导地位的罚款规模。
A rapidly increasing effort to merge functional community ecology and phylogenetic biology has increased our understanding of community assembly. However, studies using both phylogenetic- and trait-based methods have been mainly conducted in old-growth forests, with fewer studies in human-disturbed communities, which play an increasingly important role in providing ecosystem services as primary forests are degraded. We used data from 18 1-ha plots in tropical old-growth forests and secondary forests with different disturbance histories (logging and shifting cultivation) and vegetation types (tropical lowland and montane forests) on Hainan Island, southern China. The distributions of 11 functional traits were compared among these six forest types. We used a null model approach to assess the effects of disturbance regimes on variation in response and effect traits and community phylogenetic structure across different stem sizes (saplings, treelets, and adult trees) and spatial scales (10–50 m). We found significant differences in the distribution of functional traits in highly disturbed lowland sites versus other forest types. Many individuals in highly disturbed lowland sites were deciduous, spiny, with non-fleshy fruits and seeds dispersed passively or by wind, and low SLA. The response traits of coexisting species were clustered in all sites except for highly disturbed lowland sites where evenness was evident. There were different distributions of effect traits for saplings and treelets among different forest types but adult trees showed stronger clustering of trait values with increasing spatial scale among all forest types. Phylogenetic clustering predominated across all size classes and spatial scales in the highly disturbed lowland sites, and evenness in other forest types. High disturbance can lead to abiotic filtering, generating a community dominated by closely related species with disturbance-adapted traits, where biotic interactions play a relatively minor role. In lightly disturbed and old growth forests, multiple processes simultaneously drive the community assembly, but biotic processes dominate at the fine scale.