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Using citizen science to estimate surficial soil Blue Carbon stocks in Great British saltmarshes

Craig Smeaton, Annette Burden, Paulina Ruranska, Cai Ladd Orcid Logo, Angus Garbutt, Laurence Jones, Lucy McMahon, Lucy C. Miller, Martin W. Skov, William E. N. Austin

Frontiers in Marine Science, Volume: 9

Swansea University Author: Cai Ladd Orcid Logo

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DOI (Published version): 10.3389/fmars.2022.959459

Abstract

A new saltmarsh soil dataset comprising of geochemical and physical property data from 752 soil samples collected through a sampling program supported by citizen scientists has been brought together with existing data to make the first national estimates of the surficial (top 10 cm) soil OC stock fo...

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Published in: Frontiers in Marine Science
ISSN: 2296-7745
Published: Frontiers Media SA 2022
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa64486
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Abstract: A new saltmarsh soil dataset comprising of geochemical and physical property data from 752 soil samples collected through a sampling program supported by citizen scientists has been brought together with existing data to make the first national estimates of the surficial (top 10 cm) soil OC stock for Great British (GB) saltmarshes. To allow the inclusion of secondary data in the soil stock estimate a new bespoke organic matter to organic carbon conversion for GB saltmarsh soil was developed allowing organic matter data measured using loss-on-ignition to be convert to organic carbon content. The total GB surficial soil OC stock is 2.320 ± 0.470 Mt; English saltmarshes hold 1.601 ± 0.426 Mt OC, Scottish saltmarshes hold 0.368 ± 0.091 Mt OC, and Welsh saltmarshes hold 0.351 ± 0.082 Mt OC. The stocks were calculated within a Markov Chain Monte Carlo framework allowing robust uncertainty estimates to be derived for the first time. Spatial mapping tools are available to accompany these stock estimates at individual saltmarsh habitats throughout GB. This data will aid in the protection and management of saltmarshes and represents the first steps towards the inclusion of saltmarsh OC in the national inventory accounting of blue carbon ecosystems.
Keywords: Saltmarsh, carbon, vegetation, soil, organic matter, citizen science, spatial mapping, Great Britain
College: Faculty of Science and Engineering
Funders: This research was finically supported by the Natural Environment Research Council funded Carbon Storage in Intertidal Environments (C-SIDE) project (grant NE/R010846/1) with additional support from the Scottish Blue Carbon Forum.

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