Mechanisms underlying local functional and phylogenetic beta diversity in two temperate forests.
Mechanisms underlying local functional and phylogenetic beta diversity in two temperate forests.
复制标题
DOI：
10.1890/14-0392.1
复制
发表时间：
2015-04
期刊：
影响因子：
4.8
通讯作者：
Xugao Wang;T. Wiegand;N. Swenson;Amy Wolf;R. Howe;Zhanqing Hao;Fei Lin;Ji Ye;Zuoqiang Yuan
中科院分区：
文献类型：
--
作者：
Xugao Wang;T. Wiegand;N. Swenson;Amy Wolf;R. Howe;Zhanqing Hao;Fei Lin;Ji Ye;Zuoqiang Yuan
虽然性状信息已被广泛用于探索森林群落结构的潜在机制，但大多数研究都集中在系统发育或功能α多样性的局部模式上。功能β多样性的调查，另一方面，还没有进行在当地规模的空间明确的方式。在这项研究中，我们提供了一个强大的方法的基础上，在空间点格局分析的最新进展，充分映射数据的大型和小型树木在两个大型温带森林地块。这种方法使我们能够评估不同的生态过程和机制的相对重要性，以解释当地的系统发育和功能β多样性的模式。对于森林和大小类，我们发现了一个清晰的尺度层次：栖息地过滤占模式的系统发育和功能β多样性在较大的距离（150-250米），扩散限制解释了在150米以下距离观察到的β多样性下降，和物种间的相互作用解释了在植物近邻尺度上功能和系统发育β多样性的微小偏离（20米以下）。因此，栖息地过滤和扩散限制影响了在局部尺度上观察到的系统发育和功能β多样性模式。这一结果与以前的研究从相同的森林，其中传播限制单独接近观察到的物种β多样性的距离可达250米。此外，物种间的相互作用是相对不重要的预测系统发育和功能β多样性。我们的分析表明，系统发育和功能β多样性可以提供深入了解当地社区大会的机制，只专注于物种β多样性的研究错过了。
Although trait information has been widely used to explore underlying mechanisms of forest community structure, most studies have focused on local patterns of phylogenetic or functional alpha diversity. Investigations of functional beta diversity, on the other hand, have not been conducted at local scales in a spatially explicit way. In this study, we provide a powerful methodology based on recent advances in spatial point pattern analysis using fully mapped data of large and small trees in two large temperate forest plots. This approach allowed us to assess the relative importance of different ecological processes and mechanisms for explaining patterns of local phylogenetic and functional beta diversity. For both forests and size classes, we found a clear hierarchy of scales: habitat filtering accounted for patterns of phylogenetic and functional beta diversity at larger distances (150-250 m), dispersal limitation accounted for the observed decline in beta diversity at distances below 150 m, and species interactions explained small departures from functional and phylogenetic beta diversity at the immediate plant-neighborhood scale (below 20 m). Thus, both habitat filtering and dispersal limitation influenced the observed patterns in phylogenetic and functional beta diversity at local scales. This result contrasts with a previous study from the same forests, where dispersal limitation alone approximated the observed species beta diversity for distances up to 250 m. In addition, species interactions were relatively unimportant for predicting phylogenetic and functional beta diversity. Our analysis suggests that phylogenetic and functional beta diversity can provide insights into the mechanisms of local community assembly that are missed by studies focusing exclusively on species beta diversity.