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Published VersionCC BY V4.0, Open Access
Journal article
Soil carbon fractionation as a tool to monitor coastal wetland rehabilitation
Journal of Environmental Management, Vol.373, pp.1-16
2025
PMID: 39740455
Appears in UniSC Supported Open Access Outputs
Abstract
Coastal wetland rehabilitation can provide nature-based solutions for climate change mitigation. The high carbon accumulation rate and carbon secured, potentially for several millennia, as soil organic carbon (SOC), is among the reasons. Measuring SOC storage and accrual over time are the main tools to understand rehabilitation success. However, SOC is partitioned among different organic matter fractions with varying physio-chemical properties and stabilities. In this research, we separated different organic matter fractions based on density (free light fraction: f-LF, occluded light fraction: o-LF and heavy fraction: HF) and solubility (dissolved fraction: DF) from soils taken from a wetland under rehabilitation and a pristine mangrove forest in Queensland, Australia. The f-LF and o-LF contain particulate organic carbon (POCf-LF and POCo-LF), whereas HF consists of mineral-associated organic carbon (MAOCHF). Mangroves are superior to wetlands under rehabilitation and terrestrial forests in terms of C storage in each fraction. Soils from both mangroves and wetlands under rehabilitation are dominated by MAOCHF. However, MAOCHF from mangrove soils are relatively physio-chemically stable, while wetlands under rehabilitation are leaching aged-SOC (>1000 years) from the HF to DF as dissolved organic carbon (DOCDF). Therefore, reducing the risk of mobilisation of aged-SOC can be a key to achieve rehabilitation success.
Details
- Title
- Soil carbon fractionation as a tool to monitor coastal wetland rehabilitation
- Authors
- Iroshaka Gregory Cooray (Corresponding Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringGareth R L Chalmers (Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringDavid Chittleborough (Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringZeinab Ghasemzadeh - The University of Adelaide
- Publication details
- Journal of Environmental Management, Vol.373, pp.1-16
- Publisher
- Elsevier BV
- Date published
- 2025
- DOI
- 10.1016/j.jenvman.2024.123950
- ISSN
- 1095-8630; 0301-4797
- PMID
- 39740455
- Copyright note
- © 2024 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ ).
- Data Availability
- Data will be made available on request.
- Grants
- Blue Heart Wetland Restoration, 0980027019, Sunshine Coast Council (Australia)
- Organisation Unit
- School of Science, Technology and Engineering; Sustainability Research Cluster
- Language
- English
- Record Identifier
- 991090798902621
- Output Type
- Journal article
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