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How disastrous was Oceanic Anoxic Event 2? A shelf versus deep-sea comparison from the echinoderm perspective

第二次海洋缺氧事件有多严重？

基本信息

批准号：
203324778
负责人：
Privatdozent Dr. Mike Reich
金额：
--
依托单位：
Abteilung Geobiologie
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/203324778?language=en
关键词：
How disastrous was Oceanic Anoxic

项目摘要

The deep sea is by far the most widespread environment on the planet, yet our knowledge on thecomposition, biodiversity and the origin of the deep-sea biota remains remarkably poor. Particularlyobscure is the geological history and the evolutionary dynamics of the present-day macrobenthos. Thedeep-sea biota is either relatively recent, resulting from multiple turnovers linked to large disruptions ofthe deep sea environment, or it is ancient and presumably resilient to such changes. The reason whythis debate is unsettled is the lack of direct evidence on the geological history of deep-seamacrobenthos due to the absence of outcrops of deep-sea sediments with preserved fossil remains.Recently, we have identified an unexpected possibility to investigate the evolution of deep-seamacrobenthos and provide key direct evidence to assess the evolutionary origin of the deep-seaecosystems. In a pilot study, we have discovered significant quantities of identifiable skeletal remainsof fossil echinoderms in mid-Cretaceous sediments recovered by the Ocean Drilling Program. In thisproject we will build on this discovery and use DSDP/ODP material to systematically assess thecomposition and diversity of Lower Cretaceous deep-sea echinoderm communities in order to testwhether they significantly differ from modern equivalents and when the last major reorganisation of thedeep-sea fauna took place. This project gives a new perspective to ODP/DSDP material that could setoff an entirely new range of applications based on the microfossil record of macrobenthic groups.

深海是迄今为止地球上分布最广的环境，但我们对深海生物群的组成、生物多样性和起源的了解仍然非常贫乏。特别模糊的是现代大型底栖动物的地质历史和进化动力学。深海生物群要么是相对较新的，由与深海环境大规模破坏有关的多次更替造成的，要么是古老的，可能对这种变化有弹性。由于缺乏深海底栖生物的地质历史直接证据，这一争论一直悬而未决。最近，我们发现了一种意想不到的可能性，可以研究深海底栖生物的演化，并为评估深海生态系统的演化起源提供关键的直接证据。在一项初步研究中，我们在大洋钻探计划中发现的白垩纪中期沉积物中发现了大量可识别的棘皮动物化石骨骼。在本项目中，我们将在这一发现的基础上，使用DSDP/ODP材料系统地评估早白垩世深海棘皮动物群落的组成和多样性，以测试它们是否与现代的同类动物有显著差异，以及深海动物群最后一次重大重组发生的时间。该项目为ODP/DSDP材料提供了一个新的视角，可以根据大型底栖动物群的微体化石记录开展一系列全新的应用。