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. 2020 Jun 1;11:2705. doi: 10.1038/s41467-020-16374-7

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© The Author(s) 2020

Open Access 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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Fig. 3 — Effects are computed as a function of the H₂ volcanic outgassing and abiotic surface temperature (T_Geo), for each ecosystem composition. MG indicates H₂-based methanogens. AG+AT indicates CO-based acetogens and methanogenic acetotrophs consortia. MG+AG+AT indicates co-occurring methanogens, acetogens, and acetotrophs. T_Geo is varied by changing pCO₂ in the climate model. a Atmospheric pCH₄ at ecosystem-climate equilibrium. Shaded areas indicate conditions for organic haze formation. b Temperature differential between T_Geo and the global surface temperature reached at ecosystem-climate equilibrium, T_BioGeo. Shaded areas indicate conditions leading to organic haze formation (a) and glaciation (b). Other parameters are set at their default values (Supplementary Tables 2 and 3).