Biogeosciences
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Articles | Volume 23, issue 13
Articles | Volume 23, issue 13
https://doi.org/10.5194/bg-23-4893-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-4893-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 13
Research article
 | 
16 Jul 2026
Research article |  | 16 Jul 2026

Are ghost forest trees a substantial source of methane from reservoirs?

Johannes Dittmann, Damien T. Maher, Scott G. Johnston, Douglas R. Tait, Paula Gomez-Alvarez, Alistair Grinham, Katrin Sturm, and Luke C. Jeffrey

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Short summary
Reservoir dead trees (‘ghost forests’) are an overlooked methane (CH4) source in standing freshwaters. We measured CH4 fluxes from 34 trees at multiple stem heights, alongside aquatic CH4 fluxes and physicochemistry, across two field campaigns. Ghost forest CH4 fluxes were highest near reservoir inflows, with tree CH4 contributing extra emissions of 14–15 % on top of the commonly quantified pathways of ebullition and diffusion.
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