Diversity change during the rise of tetrapods and the impact of the 'Carboniferous rainforest collapse'.
Diversity change during the rise of tetrapods and the impact of the 'Carboniferous rainforest collapse'.
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DOI：
10.1098/rspb.2017.2730
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发表时间：
2018-02-14
期刊：
影响因子：
--
通讯作者：
Butler RJ
中科院分区：
文献类型：
--
作者：
Dunne EM;Close RA;Button DJ;Brocklehurst N;Cashmore DD;Lloyd GT;Butler RJ
石炭世和早二叠纪是早期四足动物（四足动物）多样化的关键时期，但这一时期的主要多样性模式和生物地理仍未确定。先前的估计表明，全球四足动物多样性在这段时间内持续上升，而“石炭纪雨林崩溃”（CRC）之后的栖息地破碎化推动了群落中地方性的增加。然而，以前的工作未能充分考虑采样的空间和时间偏差。本文利用采样标准化和网络生物地理学方法，建立了一个新的全球物种水平数据集，重新评估了早期四足动物的多样性和生物地理学。我们的结果支持观测到的丰富度和采样之间的紧密关系，特别是在石炭纪。亚样本物种丰富度在晚石炭世开始增加，在石炭/二叠纪界线上大幅下降，在早二叠世缓慢恢复。我们的生物地理学分析不支持CRC驱动地方性的假设；相反，我们发现了二叠纪早期世界主义增加的证据。虽然环境的变化可能在二叠纪早期的多样性减少中发挥了作用，但我们的研究结果表明，CRC之后，群落之间的全球连通性增加，可能反映了分散障碍的减少和羊膜动物的多样化。
The Carboniferous and early Permian were critical intervals in the diversification of early four-limbed vertebrates (tetrapods), yet the major patterns of diversity and biogeography during this time remain unresolved. Previous estimates suggest that global tetrapod diversity rose continuously across this interval and that habitat fragmentation following the ‘Carboniferous rainforest collapse’ (CRC) drove increased endemism among communities. However, previous work failed to adequately account for spatial and temporal biases in sampling. Here, we reassess early tetrapod diversity and biogeography with a new global species-level dataset using sampling standardization and network biogeography methods. Our results support a tight relationship between observed richness and sampling, particularly during the Carboniferous. We found that subsampled species richness initially increased into the late Carboniferous, then decreased substantially across the Carboniferous/Permian boundary before slowly recovering in the early Permian. Our analysis of biogeography does not support the hypothesis that the CRC drove endemism; instead, we found evidence for increased cosmopolitanism in the early Permian. While a changing environment may have played a role in reducing diversity in the earliest Permian, our results suggest that the CRC was followed by increased global connectivity between communities, possibly reflecting both reduced barriers to dispersal and the diversification of amniotes.
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影响因子：
3.7
作者：
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通讯作者：
Clack J
DOI：
10.1098/rspb.2009.0352
发表时间：
2009-07-22
影响因子：
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通讯作者：
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影响因子：
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作者：
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