Quantifying ecospace utilization and ecosystem engineering during the early Phanerozoic-The role of bioturbation and bioerosion
Quantifying ecospace utilization and ecosystem engineering during the early Phanerozoic-The role of bioturbation and bioerosion
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DOI：
10.1126/sciadv.abb0618
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发表时间：
2020-08-01
期刊：
影响因子：
13.6
通讯作者：
Olea, Ricardo A.
中科院分区：
文献类型：
--
作者：
Buatois, Luis A.;Mangano, M. Gabriela;Olea, Ricardo A.
寒武纪大爆发（CE）和奥陶纪生物多样化大事件（GOBE）是古生代海洋中最重要的两次辐射事件。利用1367个地层单元的信息，我们量化了生物扰动和生物侵蚀在生态空间利用和生态系统工程中的作用。在埃迪卡拉纪-寒武纪过渡时期，所有多样性指标都有所增加，随后在寒武纪中晚期，大多数多样性指标都有所减少，而在奥陶纪则略有增加。生物扰动的生物多样性和生物差异在东东和东东期间显著增加。创新首先出现在海上环境，随后扩展到边缘海洋、近岸、深水和碳酸盐岩环境。这项研究强调了CE的重要性，尽管它起源于埃迪卡拉纪。近海和陆架古环境的动物化差异支持早寒武世楔形最低氧带假说，而不是水平分层海洋假说。
The Cambrian explosion (CE) and the great Ordovician biodiversification event (GOBE) are the two most important radiations in Paleozoic oceans. We quantify the role of bioturbation and bioerosion in ecospace utilization and ecosystem engineering using information from 1367 stratigraphic units. An increase in all diversity metrics is demonstrated for the Ediacaran-Cambrian transition, followed by a decrease in most values during the middle to late Cambrian, and by a more modest increase during the Ordovician. A marked increase in ichnodiversity and ichnodisparity of bioturbation is shown during the CE and of bioerosion during the GOBE. Innovations took place first in offshore settings and later expanded into marginal-marine, nearshore, deep-water, and carbonate environments. This study highlights the importance of the CE, despite its Ediacaran roots. Differences in infaunalization in offshore and shelf paleoenvironments favor the hypothesis of early Cambrian wedge-shaped oxygen minimum zones instead of a horizontally stratified ocean.