The impact of sampling depths on quantification of soil organic carbon stock in mangrove environments

Iroshaka Gregory Cooray; Gareth R L Chalmers; David Chittleborough

doi:10.1016/j.catena.2024.108398

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The impact of sampling depths on quantification of soil organic carbon stock in mangrove environments

Journal article

Open access

Peer reviewed

The impact of sampling depths on quantification of soil organic carbon stock in mangrove environments

Iroshaka Gregory Cooray, Gareth R L Chalmers and David Chittleborough

CATENA, Vol.246, pp.1-15

2024

DOI: https://doi.org/10.1016/j.catena.2024.108398

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Abstract

Soil chemistry and soil carbon sequestration (excl. carbon sequestration science)

Physical geography and environmental geoscience

Mangroves

Coastal geomorphology

Accommodation space

Soil carbon stock

Soil sampling

Sediment supply

Mangroves are among the most productive blue carbon ecosystems, storing large quantities of organic carbon particularly in soils for millennia amidst of the global sea-level change. Despite the many attempts during the last decade to quantify soil organic carbon (SOC) stock of mangroves worldwide, most data remain highly ambiguous because of shallow depth of sampling (<1 m). Using the data extracted from previous studies, here we discuss the importance of sampling deep (>1 m) soil layers for SOC stock estimations. Carbon storage in deeper sediment layers varies notably among mangroves that occur in carbonate and terrigenous sedimentary landscapes. The organic soil material (OSM) layer of mangroves in terrigenous landscapes is often restricted to a depth < 1 m. The mineral soil material (MSM) layer that dominates these profiles may extend beyond 3 m in depth. As deep mangrove sediment layers (>1 m) can harbour SOC stocks ranging from 542.60 ± 43.92 to 1885.72 ± 64.5 Mg OC ha 1 , sampling only the first metre of the profile can greatly underestimate their C storage potential and ecosystem services. We also find that soil depth distribution functions as a useful tool in predicting deep SOC stock in mangrove environments, particularly when many studies do not sample the entire MSM layer.

Details

Title: The impact of sampling depths on quantification of soil organic carbon stock in mangrove environments
Authors: Iroshaka Gregory Cooray (Corresponding Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and Engineering
Gareth R L Chalmers (Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and Engineering
David Chittleborough (Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and Engineering
Publication details: CATENA, Vol.246, pp.1-15
Publisher: Elsevier BV
Date published: 2024
DOI: 10.1016/j.catena.2024.108398
ISSN: 1872-6887; 0341-8162
Copyright note: (c) 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/).
Data Availability: Attached the excel data file at the “Attach File Step” (Appendix A).
Grants: Blue Heart Wetland Restoration, 0980027019, Sunshine Coast Council (Australia)
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 991062498602621
Output Type: Journal article

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