LIFE ON THE ROCKS: HABITAT USE DRIVES MORPHOLOGICAL AND PERFORMANCE EVOLUTION IN LIZARDS
LIFE ON THE ROCKS: HABITAT USE DRIVES MORPHOLOGICAL AND PERFORMANCE EVOLUTION IN LIZARDS
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DOI：
10.1890/07-2093.1
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发表时间：
2008-12-01
期刊：
影响因子：
4.8
通讯作者：
Schwarzkopf, Lin
中科院分区：
文献类型：
--
作者：
Goodman, Brett A.;Miles, Donald B.;Schwarzkopf, Lin
作为一个群体，蜥蜴在世界范围内占据了大量的栖息地，但相对较少的情况下，栖息地的使用(生态学)、形态和表现，显然是相关的。最著名的例子包括：由于树栖栖息地直径的增加而增加的肢体长度，以及由于一些石龙鱼栖息地开放程度增加而增加的肢体长度。岩石生境对特定的形态特征施加了强烈的自然选择，这与强加给陆地物种的不同，因为在大小和形状不规则的倾斜底物上移动以可预测的方式限制了运动能力。我们量化了澳大利亚热带23个种群的19种蜥蜴的栖息地利用、形态和性能。这些物种使用的栖息地在岩石可获得性方面有相当大的变化。比较系统发育分析表明，与主要占据落叶的森林生境物种相比，岩石占主导地位的栖息地与肢体长度增加的进化相关。此外，肢体长度的增加直接影响到表现，来自岩石栖息地的物种比来自岩石较少栖息地的近亲具有更强的冲刺、攀登和紧贴能力。因此，我们发现在这组热带蜥蜴中，岩石的使用程度与形态和性能的演变都相关。
As a group, lizards occupy a vast array of habitats worldwide, yet there remain relatively few cases where habitat use (ecology), morphology, and thus, performance, are clearly related. The best known examples include: increased limb length in response to increased arboreal perch diameter in anoles and increased limb length in response to increased habitat openness for some skinks. Rocky habitats impose strong natural selection on specific morphological characteristics, which differs from that imposed on terrestrial species, because moving about on inclined substrates of irregular sizes and shapes constrains locomotor performance in predictable ways. We quantified habitat use, morphology, and performance of 19 species of lizards (family Scincidae, subfamily Lygosominae) from 23 populations in tropical Australia. These species use habitats with considerable variation in rock availability. Comparative phylogenetic analyses revealed that occupation of rock-dominated habitats correlated with the evolution of increased limb length, compared to species from forest habitats that predominantly occupied leaf litter. Moreover, increased limb length directly affected performance, with species from rocky habitats having greater sprinting, climbing, and clinging ability than their relatives from less rocky habitats. Thus, we found that the degree of rock use is correlated with both morphological and performance evolution in this group of tropical lizards.