Articles | Volume 18, issue 18
https://doi.org/10.5194/bg-18-5085-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-5085-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| Highlight paper
| 
16 Sep 2021
Research article | Highlight paper |
| 16 Sep 2021
| 16 Sep 2021
Soil greenhouse gas fluxes from tropical coastal wetlands and alternative agricultural land uses
Australian Rivers Institute, Griffith University, Nathan, QLD, 4111, Australia
Emad Kavehei
Australian Rivers Institute, Griffith University, Nathan, QLD, 4111, Australia
Damien T. Maher
School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, 2480, Australia
Stuart E. Bunn
Australian Rivers Institute, Griffith University, Nathan, QLD, 4111, Australia
Mehran Rezaei Rashti
Australian Rivers Institute, Griffith University, Nathan, QLD, 4111, Australia
Bahareh Shahrabi Farahani
Australian Rivers Institute, Griffith University, Nathan, QLD, 4111, Australia
Maria Fernanda Adame
Australian Rivers Institute, Griffith University, Nathan, QLD, 4111, Australia
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EGUsphere, https://doi.org/10.5194/egusphere-2025-5594, https://doi.org/10.5194/egusphere-2025-5594, 2025
This preprint is open for discussion and under review for Biogeosciences (BG).
Short summary
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.
Dylan R. Brown, Humberto Marotta, Roberta B. Peixoto, Alex Enrich-Prast, Glenda C. Barroso, Mario L. G. Soares, Wilson Machado, Alexander Pérez, Joseph M. Smoak, Luciana M. Sanders, Stephen Conrad, James Z. Sippo, Isaac R. Santos, Damien T. Maher, and Christian J. Sanders
Biogeosciences, 18, 2527–2538, https://doi.org/10.5194/bg-18-2527-2021, https://doi.org/10.5194/bg-18-2527-2021, 2021
Short summary
Short summary
Hypersaline tidal flats (HTFs) are coastal ecosystems with freshwater deficits often occurring in arid or semi-arid regions near mangrove supratidal zones with no major fluvial contributions. This study shows that HTFs are important carbon and nutrient sinks which may be significant given their extensive coverage. Our findings highlight a previously unquantified carbon as well as a nutrient sink and suggest that coastal HTF ecosystems could be included in the emerging blue carbon framework.
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Short summary
Greenhouse gas emissions were measured and compared from natural coastal wetlands and their converted agricultural lands across annual seasonal cycles in tropical Australia. Ponded pastures emitted ~ 200-fold-higher methane than any other tested land use type, suggesting the highest greenhouse gas mitigation potential and financial incentives by the restoration of ponded pastures to natural coastal wetlands.
Greenhouse gas emissions were measured and compared from natural coastal wetlands and their...
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