Reef fish functional traits evolve fastest at trophic extremes
Reef fish functional traits evolve fastest at trophic extremes
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DOI：
10.1038/s41559-018-0725-x
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发表时间：
2019-02-01
影响因子：
16.8
通讯作者：
McGee, Matthew D.
中科院分区：
文献类型：
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作者：
Borstein, Samuel R.;Fordyce, James A.;McGee, Matthew D.
营养生态学被认为对生物多样性有深远的影响，但这一过程的具体细节很少在大空间和进化尺度上进行研究。我们在一个大规模的系统发育框架内研究了物种最丰富和最复杂的脊椎动物组合之一珊瑚礁鱼类的营养位置和饮食宽度如何影响功能性状的进化。我们表明，与既定理论相反，在营养专家中，在非常低和高营养地位的狭窄饮食宽度中，功能特征进化得最快。顶级营养级专科动物表现出最多的功能多样性，而中等营养级和饮食宽度较宽的杂食性类群则表现出最少的功能多样性。我们的研究结果揭示了营养位置在形成进化动力学中的重要性，同时突出了珊瑚礁鱼类组合中存在的令人难以置信的营养和功能多样性。
Trophic ecology is thought to exert a profound influence on biodiversity, but the specifics of the process are rarely examined at large spatial and evolutionary scales. We investigate how trophic position and diet breadth influence functional trait evolution in one of the most species-rich and complex vertebrate assemblages, coral reef fishes, within a large-scale phylogenetic framework. We show that, in contrast with established theory, functional traits evolve fastest in trophic specialists with narrow diet breadths at both very low and high trophic positions. Top trophic level specialists exhibit the most functional diversity, while omnivorous taxa with intermediate trophic positions and wide diet breadth have the least functional diversity. Our results reveal the importance of trophic position in shaping evolutionary dynamics while simultaneously highlighting the incredible trophic and functional diversity present in coral reef fish assemblages.