Diversity and disparity through time in the adaptive radiation of Antarctic notothenioid fishes.
Diversity and disparity through time in the adaptive radiation of Antarctic notothenioid fishes.
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DOI：
10.1111/jeb.12570
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发表时间：
2015-02
影响因子：
2.1
通讯作者：
Matschiner M
中科院分区：
文献类型：
--
作者：
Colombo M;Damerau M;Hanel R;Salzburger W;Matschiner M
根据理论，适应性辐射是由生态机会触发的，这些机会可以通过新栖息地的殖民化、拮抗物的灭绝或关键创新的起源而产生。在适应性辐射的过程中，多样化和形态进化预计将放缓后，迅速适应空置的生态位的初始阶段，其次是物种形成。这种“早期爆发”的多样化被认为是因为利基空间随着时间的推移变得越来越充满。南极南极鱼的多样化超过120种，已成为海洋领域适应性辐射的主要例子之一，可能是由抗冻糖蛋白出现形式的进化关键创新引发的。在这里，我们测试，使用一种新的时间校准的49个物种和五个特征，notothenioid身体的大小和形状以及浮力适应和栖息地的偏好，无论是notothenioid适应性辐射是兼容的早期爆发的情况。广泛的贝叶斯模型的比较表明，系统发育年龄估计高度依赖于模型的选择，与非连锁基因树的模型通常更好地支持，并导致年轻的年龄估计。我们发现了强有力的证据，在南极notothenioids的多样化率升高相比，外群，但没有迹象表明率异质性的辐射过程中，除了notothenioid家庭Artedidraconidae似乎显示二次升高的多样化率。我们进一步观察到营养形态的早期爆发，这表明，notothenioid辐射收益的阶段类似于其他突出的例子适应性辐射。
According to theory, adaptive radiation is triggered by ecological opportunity that can arise through the colonization of new habitats, the extinction of antagonists or the origin of key innovations. In the course of an adaptive radiation, diversification and morphological evolution are expected to slow down after an initial phase of rapid adaptation to vacant ecological niches, followed by speciation. Such ‘early bursts’ of diversification are thought to occur because niche space becomes increasingly filled over time. The diversification of Antarctic notothenioid fishes into over 120 species has become one of the prime examples of adaptive radiation in the marine realm and has likely been triggered by an evolutionary key innovation in the form of the emergence of antifreeze glycoproteins. Here, we test, using a novel time-calibrated phylogeny of 49 species and five traits that characterize notothenioid body size and shape as well as buoyancy adaptations and habitat preferences, whether the notothenioid adaptive radiation is compatible with an early burst scenario. Extensive Bayesian model comparison shows that phylogenetic age estimates are highly dependent on model choice and that models with unlinked gene trees are generally better supported and result in younger age estimates. We find strong evidence for elevated diversification rates in Antarctic notothenioids compared to outgroups, yet no sign of rate heterogeneity in the course of the radiation, except that the notothenioid family Artedidraconidae appears to show secondarily elevated diversification rates. We further observe an early burst in trophic morphology, suggesting that the notothenioid radiation proceeds in stages similar to other prominent examples of adaptive radiation.
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影响因子：
2.9
作者：
Butler, MA;King, AA
通讯作者：
King, AA
DOI：
10.1073/pnas.0506330102
发表时间：
2005-12-13
影响因子：
11.1
作者：
Gavrilets, S;Vose, A
通讯作者：
Vose, A
影响因子：
1.6
作者：
Eastman, JT
通讯作者：
Eastman, JT
DOI：
10.1098/rspb.2012.1669
发表时间：
2012-12-07
影响因子：
4.7
作者：
Burbrink, Frank T.;Chen, Xin;Pyron, R. Alexander
通讯作者：
Pyron, R. Alexander
影响因子：
1.9
作者：
Dettai, A.;Berkani, M.;Gallut, C.
通讯作者：
Gallut, C.