Habitat use affects morphological diversification in dragon lizards.

Habitat use affects morphological diversification in dragon lizards.
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DOI:
10.1111/j.1420-9101.2010.01971.x
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发表时间:
2010-05
影响因子:
2.1
通讯作者:
Losos JB
Losos JB
中科院分区:
生物学3区
文献类型:
--
作者:
Collar DC;Schulte JA 2nd;O'Meara BC;Losos JB

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栖息地的利用可能导致进化谱系之间多样性的变化,因为栖息地在允许物种谋生的各种方式上有所不同。在这里,我们表明,结构栖息地有助于龙蜥蜴(Agamidae)的肢体和身体形式的差异多样化。基于系统发育分析和祖先状态重建的90个物种,我们发现,多个谱系独立地采用了四种生境利用类型:岩石居住,陆生,半树栖和树栖。鉴于这些重建,我们适合物种的形态特征值的进化模型,并发现岩石居住和arboreality限制多样化相对于terrestriality和半arboreality。赤池信息标准的首选模型推断推断占用岩石和树木的谱系的大小和形状的演变速度较慢,模型平均速率估计是最慢的这些栖息地类型。这些结果表明,地面居住有利于生态形态分化和树木或岩石的使用阻碍多样化。
Habitat use may lead to variation in diversity among evolutionary lineages because habitats differ in the variety of ways they allow for species to make a living. Here, we show that structural habitats contribute to differential diversification of limb and body form in dragon lizards (Agamidae). Based on phylogenetic analysis and ancestral state reconstructions for 90 species, we find that multiple lineages have independently adopted each of four habitat use types: rock-dwelling, terrestriality, semi-arboreality and arboreality. Given these reconstructions, we fit models of evolution to species’ morphological trait values and find that rock-dwelling and arboreality limit diversification relative to terrestriality and semi-arboreality. Models preferred by Akaike information criterion infer slower rates of size and shape evolution in lineages inferred to occupy rocks and trees, and model-averaged rate estimates are slowest for these habitat types. These results suggest that ground-dwelling facilitates ecomorphological differentiation and that use of trees or rocks impedes diversification.
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