Diversification rates of the “Old Endemic” murine rodents of Luzon Island, Philippines are inconsistent with incumbency effects and ecological opportunity: DIVERSIFICATION OF LUZON OLD ENDEMIC MURINES
Diversification rates of the “Old Endemic” murine rodents of Luzon Island, Philippines are inconsistent with incumbency effects and ecological opportunity: DIVERSIFICATION OF LUZON OLD ENDEMIC MURINES
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菲律宾吕宋岛“旧地方病”鼠科啮齿动物的多样化率与现有效应和生态机会不一致：吕宋岛旧地方病鼠类的多样化
DOI：
10.1111/evo.13511
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发表时间：
2018
期刊：
影响因子：
3.3
通讯作者：
Jansa, Sharon A.
中科院分区：
文献类型：
--
作者：
Rowsey, Dakota M.;Heaney, Lawrence R.;Jansa, Sharon A.
多样性依赖的分支发生时，殖民血统表现出越来越多的种间竞争，因为它的生态多样化。一个地区的重复殖民地密切相关的类群可能会导致类似的影响，因为每个谱系内的物种相互竞争。这可能是特别相关的第二殖民者，可能会经历有限的多样化，由于竞争与早期，现任殖民者在进化的时间。我们测试的假设，现任血统可能会减少二次殖民者的多样化在两个物种的分支菲律宾“老地方”鼠啮齿动物Phloeomyini和Chromomyini-on相对古老的海洋岛屿吕宋岛。虽然系统发育分析证实了独立的，noncontemporaneous殖民吕宋岛的祖先，这两个分支，我们没有发现支持逮捕的多样化。相反，它似乎是多样化的两个分支的恒定速率的过程，要么是均匀的或有利于第二殖民者（Chromomyini），这取决于所使用的方法。我们的研究结果表明，生态现任并没有发挥重要作用，在确定吕宋岛鼠之间的谱系多样化，尽管同域发生的组成物种在每个谱系，和一个实质性的领先优势的主要殖民者。
Diversity-dependent cladogenesis occurs when a colonizing lineage exhibits increasing interspecific competition as it ecologically diversifies. Repeated colonization of a region by closely related taxa may cause similar effects as species within each lineage compete with one another. This may be particularly relevant for secondary colonists, which could experience limited diversification due to competition with earlier, incumbent colonists over evolutionary time. We tested the hypothesis that an incumbent lineage may diminish the diversification of secondary colonists in two speciose clades of Philippine “Old Endemic” murine rodents—Phloeomyini and Chrotomyini—on the relatively old oceanic island of Luzon. Although phylogenetic analyses confirm the independent, noncontemporaneous colonization of Luzon by the ancestors of these two clades, we found no support for arrested diversification in either. Rather, it appears that diversification of both clades resulted from constant-rate processes that were either uniform or favored the secondary colonists (Chrotomyini), depending on the method used. Our results suggest that ecological incumbency has not played an important role in determining lineage diversification among Luzon murines, despite sympatric occurrence by constituent species within each lineage, and a substantial head start for the primary colonists.