Sahoo Swapan K, Gilleaudeau Geoffrey J, Wilson Kathleen, Hart Bruce, Barnes Ben D, Faison Tytrice, Bowman Andrew R, Larson Toti E, Kaufman Alan J
Equinor US, Houston, TX, USA.
George Mason University, Fairfax, VA, USA.
Nature. 2023 Mar;615(7953):640-645. doi: 10.1038/s41586-023-05716-2. Epub 2023 Mar 8.
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.
泥盆纪-石炭纪过渡标志着地表环境的一次根本性转变，这主要与海洋-大气氧化状态的变化有关，这些变化是由维管陆地植物的持续繁衍所引发的，维管陆地植物刺激了水文循环和大陆风化、冰川海平面变化、富营养化以及陆表海缺氧范围的扩大，还导致了大规模灭绝事件。在此，我们展示了来自北美威利斯顿盆地巴肯页岩层90个岩芯的地球化学数据在空间和时间上的全面汇编。我们的数据集能够详细记录有毒缺氧海水逐步侵入浅海的过程，正是这一过程引发了一系列晚泥盆世灭绝事件。显生宙的其他灭绝事件也与浅海缺氧范围的扩大有关，这表明硫化氢毒性是显生宙生物多样性的关键驱动因素。
