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The sediment carbon stocks of intertidal seagrass meadows in Scotland

Potouroglou, Maria; Whitlock, Danielle; Milatovic, Luna; MacKinnon, Gillian; Kennedy, Hilary; Diele, Karen; Huxham, Mark

Authors

Maria Potouroglou

Danielle Whitlock

Luna Milatovic

Gillian MacKinnon

Hilary Kennedy



Abstract

Seagrasses are highly productive ecosystems and hotspots for biodiversity, providing a plethora of benefits to the environment and to people. Their value in sequestering and storing carbon is increasingly being recognised, as the world searches for ways to mitigate the effects and slow the pace of climate change. However, many uncertainties remain, with basic information such as average carbon stocks, variability and species-specific differences missing for many regions. This study evaluates, for the first time, the carbon storage capacity of Zostera noltii and Zostera marina from intertidal seagrass meadows in Scotland. Sediment carbon stocks in the top 50 cm from vegetated and reference unvegetated plots were quantified at 10 estuaries distributed along the Scottish east and west coasts. The organic carbon stocks in the top 50 cm of the seagrass sediment ranged from a minimum of 14.94 Mg C ha−1 at the Moray Firth to a maximum of 105.72 Mg C ha−1 at the Firth of Forth, with a mean (±SD) of 54.79 ± 35.02 Mg C ha−1 across the 10 estuaries sampled. Moreover, seagrass areas showed enhanced carbon storage compared to reference unvegetated ones, however this was highly variable across depth, and among sites and estuaries. This paper addresses key gaps in knowledge concerning the role of intertidal Scottish seagrass meadows as carbon sinks and discusses the implication of this emerging information for their effective management and conservation.

Journal Article Type Article
Acceptance Date May 24, 2021
Online Publication Date Jun 5, 2021
Publication Date Sep 5, 2021
Deposit Date May 28, 2021
Publicly Available Date Jun 6, 2022
Journal Estuarine, Coastal and Shelf Science
Print ISSN 0272-7714
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 258
Article Number 107442
DOI https://doi.org/10.1016/j.ecss.2021.107442
Keywords blue carbon; Zostera marina; Zostera noltii; eelgrass; sediment
Public URL http://researchrepository.napier.ac.uk/Output/2775171

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The Sediment Carbon Stocks Of Intertidal Seagrass Meadows In Scotland (accepted version) (615 Kb)
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Publisher Licence URL
http://creativecommons.org/licenses/by-nc-nd/4.0/

Copyright Statement
Accepted version licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) license.





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