Early Palaeozoic ocean anoxia and global warming driven by the evolution of shallow burrowing.
Early Palaeozoic ocean anoxia and global warming driven by the evolution of shallow burrowing.
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DOI：
10.1038/s41467-018-04973-4
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发表时间：
2018-07-02
影响因子：
16.6
通讯作者：
Poulton SW
中科院分区：
文献类型：
--
作者：
van de Velde S;Mills BJW;Meysman FJR;Lenton TM;Poulton SW
穴居动物的进化形成了地球历史上的一个决定性事件。据推测，在古生代期间，海底洞穴的扩张改变了海洋和大气的地球化学。然而，虽然已经考虑了生物扰动对磷、氧和硫循环的潜在影响，但尚未研究综合效应，导致地球系统对生物扰动演变的反应的时间和幅度存在重大不确定性。在这里，我们整合到全球地球化学循环的COPSE模型的生物扰动的演变，并比较定量模型预测多个地球化学代理。我们的研究结果表明，寒武纪早期浅洞穴的出现导致了全球低氧状态，这种状态持续了约1亿年。这种生物扰动对全球海洋地球化学的影响可能通过扩大海洋缺氧、高大气CO2水平和全球变暖影响动物进化。在古生代期间，生物扰动作用的发生在多大程度上影响了全球地球化学，目前尚不清楚。在这里，作者将生物扰动整合到COPSE模型中，将输出与地球化学代理进行比较，并提出浅穴挖掘导致了寒武纪早期的全球低氧状态。
The evolution of burrowing animals forms a defining event in the history of the Earth. It has been hypothesised that the expansion of seafloor burrowing during the Palaeozoic altered the biogeochemistry of the oceans and atmosphere. However, whilst potential impacts of bioturbation on the individual phosphorus, oxygen and sulphur cycles have been considered, combined effects have not been investigated, leading to major uncertainty over the timing and magnitude of the Earth system response to the evolution of bioturbation. Here we integrate the evolution of bioturbation into the COPSE model of global biogeochemical cycling, and compare quantitative model predictions to multiple geochemical proxies. Our results suggest that the advent of shallow burrowing in the early Cambrian contributed to a global low-oxygen state, which prevailed for ~100 million years. This impact of bioturbation on global biogeochemistry likely affected animal evolution through expanded ocean anoxia, high atmospheric CO2 levels and global warming. The extent to which the onset of bioturbation affected global biogeochemistry during the Palaeozoic remains unclear. Here, the authors integrate bioturbation into the COPSE model, compare output with geochemical proxies, and suggest shallow burrowing contributed to a global low oxygen state during the early Cambrian.
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影响因子：
56.9
作者：
Canfield, Don E.;Poulton, Simon W.;Narbonne, Guy M.
通讯作者：
Narbonne, Guy M.
DOI：
10.1073/pnas.0902037106
发表时间：
2009-05-19
影响因子：
11.1
作者：
Canfield, Donald E.;Farquhar, James
通讯作者：
Farquhar, James
影响因子：
2.9
作者：
BERNER, RA
通讯作者：
BERNER, RA
影响因子：
4.5
作者：
Boudreau, BP
通讯作者：
Boudreau, BP
DOI：
10.1016/s0022-0981(00)00212-4
发表时间：
2000-08-30
影响因子：
2
作者：
Bianchi, TS;Johansson, B;Elmgren, R
通讯作者：
Elmgren, R