Variation and macroevolution in leaf functional traits in the Hawaiian silversword alliance (Asteraceae)
Variation and macroevolution in leaf functional traits in the Hawaiian silversword alliance (Asteraceae)
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DOI：
10.1111/1365-2745.12497
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发表时间：
2016-01-01
影响因子：
5.5
通讯作者：
Robichaux, Robert H.
中科院分区：
文献类型：
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作者：
Blonder, Benjamin;Baldwin, Bruce G.;Robichaux, Robert H.
1. 夏威夷银剑联盟是植物适应性辐射的一个典型例子。该谱系包括三个特有属（Argyroxiphium、Dubautia 和 Wilkesia）的 33 个物种，几乎占据了夏威夷群岛的所有主要栖息地。2．在这里，我们通过将多个叶片功能性状的测量与气候生态位和系统发育数据联系起来，定量地探索谱系中的功能多样性。3．我们表明，叶子功能性状变异（i）跨越了全球被子植物的大部分范围，（ii）可以通过白噪声进化模型得到最好的解释，并且（iii）以与全球叶子经济学谱和叶子脉络网络理论的预测一致的方式进行整合。4。我们的结果强调了功能多样化和整合在快速进化的植物谱系中的重要性。它们还为夏威夷银剑联盟是世界上植物适应性辐射的首要例子之一的观点提供了令人信服的额外支持。
1. The Hawaiian silversword alliance is a spectacular example of plant adaptive radiation. The lineage includes 33 species in three endemic genera (Argyroxiphium, Dubautia and Wilkesia) that occupy almost all major habitats of the Hawaiian archipelago.2. Here, we quantitatively explore functional diversification in the lineage by linking measurements of multiple leaf functional traits with climate niche and phylogenetic data.3. We show that leaf functional trait variation (i) spans much of the global angiosperm range, (ii) is best explained by a white-noise evolutionary model and (iii) is integrated in ways consistent with both the global leaf economics spectrum and the predictions of leaf venation network theory.4. Our results highlight the importance of functional diversification and integration in rapidly evolving plant lineages. They also provide compelling additional support for the view that the Hawaiian silversword alliance is one of the world's premier examples of adaptive radiation in plants.