Evolution along allometric lines of least resistance: morphological differentiation in Pristurus geckos
Evolution along allometric lines of least resistance: morphological differentiation in Pristurus geckos
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DOI：
10.1093/evolut/qpad166
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发表时间：
2023-12-01
期刊：
影响因子：
3.3
通讯作者：
Adams，Dean C.
中科院分区：
文献类型：
--
作者：
Tejero-Cicuendez，Hector;Menendez，Iris;Adams，Dean C.
生活在不同栖息地的物种经常经历独特的生态选择压力，这可能会导致表型分化。然而，生态表型模式如何受到异速生长趋势和性状整合水平的影响尚不清楚。在这里，我们评估了异速生长在利用不同栖息地塑造壁虎体型大小和体型多样性方面的作用。我们发现，具有不同栖息地偏好的物种的体型异速生长和整合模式是不同的，地面栖息的Pristurus表现出最不同的异速生长趋势和高水平的整合。个体之间的种内异速生长和物种之间的进化异速生长之间也存在很强的一致性，这表明个体之间身体形态的差异可以预测宏观进化尺度上整个系统发育的进化变化。这表明表型进化沿着阻力最小的异速生长线发生，异速生长轨迹对整个系统发育中尺寸和形状变化的幅度和方向产生强烈影响。从系统形态空间来看，最大的岩石栖息物种与最小的地面物种最相似，反之亦然。因此，在Pristurus中，沿着不同的基于栖息地的异速生长轨迹的表型进化导致在不同的生态栖息地中不同体型的相似身体形态。
Species living in distinct habitats often experience unique ecological selective pressures, which can drive phenotypic divergence. However, how ecophenotypic patterns are affected by allometric trends and trait integration levels is less well understood. Here we evaluate the role of allometry in shaping body size and body form diversity inPristurusgeckos utilizing differing habitats. We found that patterns of allometry and integration in body form were distinct in species with different habitat preferences, with ground-dwellingPristurusdisplaying the most divergent allometric trend and high levels of integration. There was also strong concordance between intraspecific allometry across individuals and evolutionary allometry among species, revealing that differences in body form among individuals were predictive of evolutionary changes across the phylogeny at macroevolutionary scales. This suggested that phenotypic evolution occurred along allometric lines of least resistance, with allometric trajectories imposing a strong influence on the magnitude and direction of size and shape changes across the phylogeny. When viewed in phylomorphospace, the largest rock-dwelling species were most similar to the smallest ground-dwelling species, and vice versa. Thus, inPristurus, phenotypic evolution along the differing habitat-based allometric trajectories resulted in similar body forms at differing body sizes in distinct ecological habitats.