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Relative importance of deterministic and stochastic processes for beta diversity of bird assemblages in Yunnan, China

机译：云南云南鸟类组合β多样性的相对重要性

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Evaluating the relative importance of deterministic and stochastic processes underlying taxonomic and functional beta diversity is crucial in community ecology, because it can reveal the dominant processes of community assembly. However, studies of bird communities remain rare and of limited spatial extents. In this study, we described the taxonomic and functional beta diversity patterns of 32 passerine bird assemblages of Yunnan Province, China. We constructed null models based on observed species beta diversity and used multiple regressions on distance matrices to evaluate the relative contributions of deterministic and stochastic processes to passerine bird assemblage dissimilarity. Our results showed significant geographic distance decay in taxonomic and functional similarity, with passerine bird assemblages located in the northwest and southwest of the province having higher functional beta diversity values than expected. Environmental distance and geographic distance explained a similar amount taxonomic beta diversity, but environmental distance explained much more functional beta diversity. Our results suggest that both deterministic and stochastic processes drive taxonomic beta diversity, but that deterministic processes, particularly environmental filtering, play a dominant role in driving functional beta diversity of passerine bird assemblages at sub‐national scale.
机译：评估分类学和功能β多样性的确定性和随机过程的相对重要性在社区生态学中至关重要，因为它可以揭示社区大会的主导过程。然而，鸟类社区的研究仍然是罕见的，空间范围有限。在这项研究中，我们描述了中国云南省32艘乘套鸟集会的分类和功能β多样性模式。我们构建了基于观察到的物种Beta多样性的空模型，并使用了对距离矩阵的多元回归来评估确定性和随机过程对帕罗内鸟类组装不一致的相对贡献。我们的结果表明，分类学和功能相似性的显着地理距离衰减，位于该省西北和西南部的Paserrine鸟集合，具有更高的功能β多样性值比预期。环境距离和地理距离解释了类似的分类β多样性，但环境距离解释了更多功能β多样性。我们的研究结果表明，确定性和随机过程驱动分类β多样性，但确定性过程，特别是环境过滤，在划分亚全国规模上驾驶普罗兰鸟集中的功能β多样性方面发挥着主导作用。

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