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Título: | Relative increases in CH4 and CO2 emissions from wetlands under global warming dependent on soil carbon substrates |
Autor: | Hu, Han; Chen, Ji; Zhou, Feng; Nie, Ming; Hou, Deyi; Liu, Huan; Delgado-Baquerizo, Manuel CSIC ORCID ; Ni, Haowei; Huang, Weigen; Zhou, Jizhong; Song, Xianwei; Cao, Xiaofeng; Sun, Bo; Zhang, Jiabao; Crowther, Thomas Ward; Liang, Yuting | Fecha de publicación: | 3-ene-2024 | Editor: | Springer Nature | Citación: | Nature Geoscience (2024). https://doi.org/10.1038/s41561-023-01345-6 | Resumen: | Compelling evidence has shown that wetland methane emissions are more temperature dependent than carbon dioxide emissions across diverse hydrologic conditions. However, the availability of carbon substrates, which ultimately determines microbial carbon metabolism, has not been adequately accounted for. By combining a global database and a continental-scale experimental study, we showed that differences in the temperature dependence of global wetland methane and carbon dioxide emissions (EM/C) were dependent on soil carbon-to-nitrogen stoichiometry. This can be explained mainly by the positive relationship between soil organic matter decomposability and EM/C. Our study indicates that only 23% of global wetlands will decrease methane relative to carbon dioxide emissions under future warming scenarios when soil organic matter decomposability is considered. Our findings highlight the importance of incorporating soil organic matter biodegradability into model predictions of wetland carbon–climate feedback. | Descripción: | 15 páginas.- 3 figuras.- 57 referencias.- Supplementary information The online version contains supplementary material available at https://doi.org/10.1038/s41561-023-01345-6 | Versión del editor: | http://dx.doi.org/10.1038/s41561-023-01345-6 | URI: | http://hdl.handle.net/10261/341882 | DOI: | 10.1038/s41561-023-01345-6 | ISSN: | 1752-0894 | E-ISSN: | 1752-0908 |
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