Geographic range did not confer resilience to extinction in terrestrial vertebrates at the end-Triassic crisis
Geographic range did not confer resilience to extinction in terrestrial vertebrates at the end-Triassic crisis
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DOI：
10.1038/ncomms8980
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发表时间：
2015-08-01
影响因子：
16.6
通讯作者：
Wills, Matthew A.
中科院分区：
文献类型：
--
作者：
Dunhill, Alexander M.;Wills, Matthew A.
灭绝的速度在不同的地质时期变化很大，损失特别集中在大规模灭绝中。其他时间的物种持续时间差异很大，但其原因尚不清楚。地理范围与海洋无脊椎动物的谱系持续时间相关，但尚不清楚这种普遍性延伸到其他栖息地的其他群体的程度。目前还不清楚广泛的地理分布是否使群体更有可能在大规模灭绝中幸存下来。在这里，我们测试了三叠纪末期陆生脊椎动物的灭绝选择性。我们证明，在整个三叠纪和侏罗纪，地理分布范围较大的陆地脊椎动物分支比分布范围较小的陆地脊椎动物分支更能抵御灭绝。然而，随着三叠纪末大规模灭绝的临近，这种关系逐渐减弱，整个事件本身就完全破裂了。我们证明这些发现并不是抽样偏差的函数；而是由抽样偏差决定的。此类研究中一个长期存在的问题。
Rates of extinction vary greatly through geological time, with losses particularly concentrated in mass extinctions. Species duration at other times varies greatly, but the reasons for this are unclear. Geographical range correlates with lineage duration amongst marine invertebrates, but it is less clear how far this generality extends to other groups in other habitats. It is also unclear whether a wide geographical distribution makes groups more likely to survive mass extinctions. Here we test for extinction selectivity amongst terrestrial vertebrates across the end-Triassic event. We demonstrate that terrestrial vertebrate clades with larger geographical ranges were more resilient to extinction than those with smaller ranges throughout the Triassic and Jurassic. However, this relationship weakened with increasing proximity to the end-Triassic mass extinction, breaking down altogether across the event itself. We demonstrate that these findings are not a function of sampling biases; a perennial issue in studies of this kind.