Bird clades with less complex appendicular skeletons tend to have higher species richness.
Bird clades with less complex appendicular skeletons tend to have higher species richness.
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阑尾骨骼的鸟类进化枝往往具有较高的物种丰富度。
DOI：
10.1038/s41467-023-41415-2
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发表时间：
2023-09-19
影响因子：
16.6
通讯作者：
Wills, Matthew A.
中科院分区：
文献类型：
--
作者：
Brinkworth, Andrew;Green, Emily;Li, Yimeng;Oyston, Jack;Ruta, Marcello;Wills, Matthew A.
物种丰富度在所有等级水平的分类类群之间明显不平衡，但这种异质性的原因尚不清楚。形态多样性（差异）与分类多样性是分离的，无论是在进化枝之间还是在不同的地质时期。形态学复杂性的研究要少得多，但有理论将复杂性与群体间的差异多样性联系起来。本文以983种现存鸟类为样本，根据前肢和后肢对的差异，设计了一个复杂性指数。我们检验了这一形态复杂性指数与支系多样性不相关的零假设，揭示了支系物种丰富度与这些支系的平均形态复杂性之间存在显著的负相关。此外，我们发现，更复杂的进化枝往往占据较少数量的饮食和栖息地生态位，这代表着更大的生态专门化与更低的物种丰富度相关。因此，更大的形态学复杂性似乎阻碍了物种多样性的产生和维持。这可能是由于对形态和生态的固守使其无法产生进一步的多样性。生物多样性在生命之树上的分布是不均匀的，理论工作表明生物的复杂性可能对形成这些模式有影响。在这里，Brinkworth等人已经表明，具有更复杂的附肢骨骼的鸟类分支往往具有较低的现存物种丰富度。
Species richness is strikingly uneven across taxonomic groups at all hierarchical levels, but the reasons for this heterogeneity are poorly understood. It is well established that morphological diversity (disparity) is decoupled from taxonomic diversity, both between clades and across geological time. Morphological complexity has been much less studied, but there is theory linking complexity with differential diversity across groups. Here we devise an index of complexity from the differentiation of the fore and hind limb pairs for a sample of 983 species of extant birds. We test the null hypothesis that this index of morphological complexity is uncorrelated with clade diversity, revealing a significant and negative correlation between the species richness of clades and the mean morphological complexity of those clades. Further, we find that more complex clades tend to occupy a smaller number of dietary and habitat niches, and that this proxy for greater ecological specialisation correlates with lower species richness. Greater morphological complexity in the appendicular skeleton therefore appears to hinder the generation and maintenance of species diversity. This may result from entrenchment into morphologies and ecologies that are less capable of yielding further diversity. Biodiversity is unevenly distributed across the tree of life, and theoretical work suggests that biological complexity may be influential in forming these patterns. Here, Brinkworth et al. have shown that bird clades with more complex appendicular skeletons tend to have lower extant species richness.
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影响因子：
3.7
作者：
Field DJ;Lynner C;Brown C;Darroch SA
通讯作者：
Darroch SA
DOI：
10.1073/pnas.0709378105
发表时间：
2008-03-25
影响因子：
11.1
作者：
Adamowicz, Sarah J.;Purvis, Andy;Wills, Matthew A.
通讯作者：
Wills, Matthew A.
影响因子：
4.8
作者：
Dawideit, Britta A.;Phillimore, Albert B.;Boehning-Gaese, Katrin
通讯作者：
Boehning-Gaese, Katrin
影响因子：
3
作者：
Brisson, Dustin
通讯作者：
Brisson, Dustin
影响因子：
64.8
作者：
Cooney CR;Bright JA;Capp EJR;Chira AM;Hughes EC;Moody CJA;Nouri LO;Varley ZK;Thomas GH
通讯作者：
Thomas GH