Laboratoire de Morphologie Fonctionnelle et Evolutive, FOCUS, Université de Liège, 4000, Liège, Belgique.
Laboratorio de Taxonomía y Ecología de Peces, Departamento de Recursos del Mar, CINVESTAV, Mérida, Yucatán, México, 97310.
Ecol Lett. 2019 Apr;22(4):572-582. doi: 10.1111/ele.13219. Epub 2019 Jan 15.
A core eco-evolutionary aim is to better understand the factors driving the diversification of functions in ecosystems. Using phylogenetic, trophic, and functional information, we tested whether trophic habits (i.e. feeding guilds) affect lineage and functional diversification in two major radiations of reef fishes. Our results from wrasses (Labridae) and damselfishes (Pomacentridae) do not fully support the 'dead-end' hypothesis that specialisation leads to reduce speciation rates because the tempo of lineage diversification did not substantially vary among guilds in both fish families. Our findings also demonstrate a tight relationship between trophic habits and functional roles held by fish in reef ecosystems, which is not associated with a variation in the tempo of functional diversification among guilds. By illustrating the pivotal importance of the generalist feeding strategy during the evolutionary history of reef fishes, our study emphasises the role of this feeding guild as a reservoir for future diversity.
核心生态进化目标是更好地理解驱动生态系统功能多样化的因素。本研究利用系统发育、营养和功能信息，检测了营养习性（即摄食群）是否会影响两个主要珊瑚礁鱼类辐射群的谱系和功能多样化。我们在鲷科（Labridae）和雀鲷科（Pomacentridae）中的研究结果并不完全支持“死胡同”假说，即特化导致物种形成率降低，因为在这两个鱼类科中，谱系多样化的速度并没有在各个群之间有显著差异。我们的研究结果还表明，鱼类在珊瑚礁生态系统中的营养习性和功能角色之间存在紧密关系，而这种关系与群之间功能多样化的速度变化无关。通过说明在珊瑚礁鱼类的进化历史中，广食性觅食策略的关键重要性，我们的研究强调了这种觅食群作为未来多样性储备的作用。
