Abstract
In an increasingly flammable world, wildfire is altering the terrestrial carbon balance. However, the degree to which novel wildfire regimes disrupt biological function remains unclear. Here, we synthesize the current understanding of above- and belowground processes that govern carbon loss and recovery across diverse ecosystems. We find that intensifying wildfire regimes are increasingly exceeding biological thresholds of resilience, causing ecosystems to convert to a lower carbon-carrying capacity. Growing evidence suggests that plants compensate for fire damage by allocating carbon belowground to access nutrients released by fire, while wildfire selects for microbial communities with rapid growth rates and the ability to metabolize pyrolysed carbon. Determining controls on carbon dynamics following wildfire requires integration of experimental and modelling frameworks across scales and ecosystems.
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Acknowledgements
Funding for this review was provided through the National Science Foundation, DEB-1553049 and DEB-1655183. Additionally, R.A.B. was supported by the Met Office Hadley Centre Climate Programme funded by DSIT, C.A.K. was supported by USDA NIFA 2022-67019-36435, and J.M. was supported by USDA NIFA 2023-67012-40085. E.G. was supported by the Environmental Molecular Sciences Laboratory (EMSL) at Pacific Northwest National Laboratory (PNNL). EMSL is a United States Department of Energy Office of Science User Facility sponsored by the Biological and Environmental Research Program under contract DE-AC05-76RL01830.
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Hudiburg, T., Mathias, J., Bartowitz, K. et al. Terrestrial carbon dynamics in an era of increasing wildfire. Nat. Clim. Chang. 13, 1306–1316 (2023). https://doi.org/10.1038/s41558-023-01881-4
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DOI: https://doi.org/10.1038/s41558-023-01881-4
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