PALEOCEANOGRAPHY OF THE TROPICAL EASTERN PACIFIC-OCEAN
PALEOCEANOGRAPHY OF THE TROPICAL EASTERN PACIFIC-OCEAN
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DOI：
10.1126/science.255.5041.172
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发表时间：
1992-01-10
期刊：
影响因子：
56.9
通讯作者：
HEY, R
中科院分区：
文献类型：
--
作者：
GRIGG, RW;HEY, R
东太平洋屏障（EPB）是当今世界上阻止热带浅水动物群扩散的最有效的海洋屏障。东太平洋珊瑚的化石记录表明，整个新生代都是如此。在白垩纪，EPB 在限制扩散方面显然效果较差。太平洋中的赤道环流似乎主要是从东向西，东太平洋中海洋环礁（现已被淹没的居奥特）的存在可能有助于扩散。同样，在中生代中、早期和晚古生代，热带太平洋中部的地体可能成为热带陆架动物群扩散的垫脚石，减少了更广阔的太平洋（Panthalassa）的隔离效应。
The East Pacific Barrier (EPB) is the most effective marine barrier to dispersal of tropical shallow-water fauna in the world today. The fossil record of corals in the eastern Pacific suggests this has been true throughout the Cenozoic. In the Cretaceous, the EPB was apparently less effective in limiting dispersal. Equatorial circulation in the Pacific then appears to have been primarily east to west and the existence of oceanic atolls (now drowned guyots) in the eastern Pacific probably aided dispersal. Similarly, in the middle and early Mesozoic and late Paleozoic, terranes in the central tropical Pacific likely served as stepping stones to dispersal of tropical shelf faunas, reducing the isolating effect of an otherwise wider Pacific Ocean (Panthalassa).