Cryptic ecological and geographic diversification in coral-associated nudibranchs.,Molecular Phylogenetics and Evolution

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Cryptic ecological and geographic diversification in coral-associated nudibranchs.
Molecular Phylogenetics and Evolution ( IF 3.6 ) Pub Date : 2019-12-05 , DOI: 10.1016/j.ympev.2019.106698
Allison L Fritts-Penniman ₁ , Terrence M Gosliner ₂ , G Ngurah Mahardika ₃ , Paul H Barber ₄

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Coral reefs are among the most biologically diverse ecosystems of the world, yet little is known about the processes creating and maintaining their diversity. Ecologically, corallivory in nudibranchs resembles phytophagy in insects- a process that for decades has served as a model for ecological speciation via host shifting. This study uses extensive field collections, DNA sequencing, and phylogenetic analyses to reconstruct the evolutionary history of coral-associated nudibranchs and assess the relative roles that host shifting and geography may have played in their diversification. We find that the number of species is three times higher than the number previously known to science, with evidence for both allopatric and ecological divergence through host shifting and host specialization. Results contribute to growing support for the importance of ecological diversification in marine environments and provide evidence for new species in the genus Tenellia.

中文翻译：

珊瑚相关裸枝的隐性生态和地理多样性。

珊瑚礁是世界上生物多样性最丰富的生态系统之一，但人们对创造和维持其多样性的过程知之甚少。从生态学上讲，裸udi科的珊瑚食性类似于昆虫的植物吞噬作用，这一过程几十年来一直是通过寄主转移而形成生态物种的模型。这项研究使用广泛的田野收集，DNA测序和系统发育分析来重建珊瑚相关裸枝的进化历史，并评估宿主转移和地理区域可能在其多样化中所发挥的相对作用。我们发现该物种的数量是以前科学已知数量的三倍，并且有证据表明通过寄主转移和寄主专业化，异源性和生态学上的差异。

更新日期：2019-12-05

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