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      Marine siliceous ecosystem decline led to sustained anomalous Early Triassic warmth.

      Isson, Terry T.; Zhang, Shuang; Lau, Kimberly V.; Rauzi, Sofia; Tosca, Nicholas J.; Penman, Donald E.; Planavsky, Noah J.
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      Isson et al 2022 Nature Comms.pdf
      Published version, 4.683Mb
      DOI
       10.1038/s41467-022-31128-3
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      Permanent link to Research Commons version
      https://hdl.handle.net/10289/15007
      Abstract
      In the wake of rapid CO₂ release tied to the emplacement of the Siberian Traps, elevated temperatures were maintained for over five million years during the end-Permian biotic crisis. This protracted recovery defies our current understanding of climate regulation via the silicate weathering feedback, and hints at a fundamentally altered carbon and silica cycle. Here, we propose that the development of widespread marine anoxia and Si-rich conditions, linked to the collapse of the biological silica factory, warming, and increased weathering, was capable of trapping Earth's system within a hyperthermal by enhancing ocean-atmosphere CO₂ recycling via authigenic clay formation. While solid-Earth degassing may have acted as a trigger, subsequent biotic feedbacks likely exacerbated and prolonged the environmental crisis. This refined view of the carbon-silica cycle highlights that the ecological success of siliceous organisms exerts a potentially significant influence on Earth's climate regime.
      Date
      2022-06-18
      Type
      Journal Article
      Rights
      This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
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