首页> 美国卫生研究院文献>Proceedings of the Royal Society B: Biological Sciences >The geological history of deep-sea colonization by echinoids: roles of surface productivity and deep-water ventilation
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The geological history of deep-sea colonization by echinoids: roles of surface productivity and deep-water ventilation

机译:类固醇在深海定殖的地质历史:表面生产力和深水通风的作用

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摘要

The origins and geological history of the modern fauna of deep-sea echinoids is explored using a combination of palaeontological and molecular data. We demonstrate that, whereas generalist omnivores have migrated into the deep sea in low numbers over the past 200 Myr, there was a short time-interval between approximately 75 and 55 Myr when the majority of specialist detritivore clades independently migrated off-shelf. This coincides with a marked increase in seasonality, continental run-off and surface water productivity, and suggests that increasing organic carbon delivery into ocean basins was an important controlling factor. Oceanic anoxic events, by contrast, appear to have played a subsidiary role in controlling deep-sea diversity.
机译:结合古生物学和分子数据,探索了深海棘皮类动物现代动物的起源和地质历史。我们证明了,尽管杂食杂食动物在过去的200多年里很少迁移到深海中,但是当大多数专业的碎屑进化枝独立地现成时,在大约75到55迈尔之间存在很短的时间间隔。这与季节,大陆径流和地表水生产率的显着增加相吻合,这表明增加向海洋盆地中输送有机碳是重要的控制因素。相反,海洋缺氧事件似乎在控制深海生物多样性方面起了辅助作用。

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