Vicariance across major marine biogeographic barriers: temporal concordance and the relative intensity of hard versus soft barriers
Vicariance across major marine biogeographic barriers: temporal concordance and the relative intensity of hard versus soft barriers
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DOI：
10.1098/rspb.2013.1541
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发表时间：
2013-10-07
影响因子：
4.7
通讯作者：
Bellwood, David R.
中科院分区：
文献类型：
--
作者：
Cowman, Peter F.;Bellwood, David R.
海洋热带包括五个主要的海洋地理区域（东太平洋，大西洋，印度洋，印度-澳大利亚群岛（IAA）和中太平洋）。这些区域被硬、软壁垒分隔。重建祖先vicariance，我们评估的时间一致性的程度，在vicariance事件跨越三个主要障碍（终端特提斯事件（TTE），巴拿马地峡（IOP），东太平洋屏障，EPB）和两个不完整的障碍（任何一方的IAA）的Labridae，Pomacentridae和Chaetodontidae。我们发现一个显着缺乏时间的一致性内和之间的三个鱼类家庭的vicariance事件与EPB，TTE和IOP。分隔大西洋和印度洋-太平洋（TTE，IOP）的硬屏障之间的Vicariance是暂时扩散的，许多vicariance事件之前的屏障形成。与此形成鲜明对比的是，IAA热点两侧的软屏障支持紧密一致的替代事件（印度洋一侧250万年;中太平洋一侧600万年）。时间上的一致性在vicariance点大规模的时间限制基因流在晚中新世和上新世。尽管历史不同且往往复杂，但硬屏障和软屏障对珊瑚礁分类群的进化具有相对较强的影响。
The marine tropics contain five major biogeographic regions (East Pacific, Atlantic, Indian Ocean, Indo-Australian Archipelago (IAA) and Central Pacific). These regions are separated by both hard and soft barriers. Reconstructing ancestral vicariance, we evaluate the extent of temporal concordance in vicariance events across three major barriers (Terminal Tethyan Event (TTE), Isthmus of Panama (IOP), East Pacific Barrier, EPB) and two incomplete barriers (either side of the IAA) for the Labridae, Pomacentridae and Chaetodontidae. We found a marked lack of temporal congruence within and among the three fish families in vicariance events associated with the EPB, TTE and IOP. Vicariance across hard barriers separating the Atlantic and Indo-Pacific (TTE, IOP) is temporally diffuse, with many vicariance events preceding barrier formation. In marked contrast, soft barriers either side of the IAA hotspot support tightly concordant vicariance events (2.5 Myr on Indian Ocean side; 6 Myr on Central Pacific side). Temporal concordance in vicariance points to large-scale temporally restricted gene flow during the Late Miocene and Pliocene. Despite different and often complex histories, both hard and soft barriers have comparably strong effects on the evolution of coral reef taxa.