美国梅森大学Sahoo, Swapan K., Gilleaudeau, Geoffrey J.和Kaufman, Alan J.的研究组最近取得一项新突破。他们提出了紫菀花与晚泥盆世大灭绝的盆地尺度重建。2023年3月8日出版的《自然》杂志发表了这项成果。

研究团队展示了来自整个巴肯页岩(北美威利斯顿盆地)90个岩心的综合时空地球化学数据汇编。他们的数据集允许详细记录有毒的富营养化海水逐步进入浅海的情况，这些情况驱动了一系列晚泥盆世灭绝事件。显生宙的其他灭绝也与浅水富营养化藻类的扩张有关，这表明硫化氢毒性是显生宙生物多样性的关键驱动因素。

据介绍，泥盆纪-石炭纪的转变标志着地表环境的基本转变，主要与海洋-大气氧化状态的变化有关，这是由于维管陆地植物的持续增殖，刺激了水循环和大陆风化、冰川融化、陆表海洋的富营养化和缺氧扩张以及大规模灭绝事件。

附：英文原文

Title: Basin-scale reconstruction of euxinia and Late Devonian mass extinctions

Author: Sahoo, Swapan K., Gilleaudeau, Geoffrey J., Wilson, Kathleen, Hart, Bruce, Barnes, Ben D., Faison, Tytrice, Bowman, Andrew R., Larsen, Toti E., Kaufman, Alan J.

Issue&Volume: 2023-03-08

Abstract: The Devonian–Carboniferous transition marks a fundamental shift in the surface environment primarily related to changes in ocean–atmosphere oxidation states, resulting from the continued proliferation of vascular land plants that stimulated the hydrological cycle and continental weathering, glacioeustasy, eutrophication and anoxic expansion in epicontinental seas, and mass extinction events. Here we present a comprehensive spatial and temporal compilation of geochemical data from 90 cores across the entire Bakken Shale (Williston Basin, North America). Our dataset allows for the detailed documentation of stepwise transgressions of toxic euxinic waters into the shallow oceans that drove a series of Late Devonian extinction events. Other Phanerozoic extinctions have also been related to the expansion of shallow-water euxinia, indicating that hydrogen sulfide toxicity was a key driver of Phanerozoic biodiversity.

DOI: 10.1038/s41586-023-05716-2

Source: https://www.nature.com/articles/s41586-023-05716-2