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Blue carbon storage capacity of Temperate eelgrass (Zostera marina ) meadows

Röhr Maria Emilia, Holmer Marianne, Baum Julia K., Björk Mats, Boyer Katharyn, Chin Diana, Chalifour Lia, Cimon Stéphanie, Cusson Mathieu, Dahl Martin, Deyanova Diana, Duffy J. Emmet, Eklöf Johan S., Geyer Julie K., Griffin John N., Gullström Martin, Hereu Clara M., Hori Masakazu, Hovel Kevin A., Hughes A. Randall, Jorgensen Pablo, Kiriakopolos Stephanie, Moksnes Per-Olav, Nakaoka Masahiro, O'Connor Mary I., Peterson Bradley, Reiss Katrin, Reynolds Pamela L., Rossi Francesca, Ruesink Jennifer, Santos Rui, Stachowicz John J., Tomas Fiona, Lee Kun-Seop, Unsworth Richard K. F. et Boström Christoffer. (2018). Blue carbon storage capacity of Temperate eelgrass (Zostera marina ) meadows. Global Biogeochemical Cycles, 32, (10), p. 1457-1475.

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URL officielle: http://dx.doi.org/doi:10.1029/2018GB005941

Résumé

Despite the importance of coastal ecosystems for the global carbon budgets, knowledge of their carbon storage capacity and the factors driving variability in storage capacity is still limited. Here we provide an estimate on the magnitude and variability of carbon stocks within a widely distributed marine foundation species throughout its distribution area in temperate Northern Hemisphere. We sampled 54 eelgrass (Zostera marina) meadows, spread across eight ocean margins and 36° of latitude, to determine abiotic and biotic factors influencing organic carbon (Corg) stocks in Zostera marina sediments. The Corg stocks (integrated over 25‐cm depth) showed a large variability and ranged from 318 to 26,523 g C/m2 with an average of 2,721 g C/m2. The projected Corg stocks obtained by extrapolating over the top 1 m of sediment ranged between 23.1 and 351.7 Mg C/ha, which is in line with estimates for other seagrasses and other blue carbon ecosystems. Most of the variation in Corg stocks was explained by five environmental variables (sediment mud content, dry density and degree of sorting, and salinity and water depth), while plant attributes such as biomass and shoot density were less important to Corg stocks. Carbon isotopic signatures indicated that at most sites <50% of the sediment carbon is derived from seagrass, which is lower than reported previously for seagrass meadows. The high spatial carbon storage variability urges caution in extrapolating carbon storage capacity between geographical areas as well as within and between seagrass species.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:08866236
Volume:32
Numéro:10
Pages:p. 1457-1475
Version évaluée par les pairs:Oui
Date:Octobre 2018
Identifiant unique:10.1029/2018GB005941
Sujets:Sciences naturelles et génie > Sciences appliquées > Eau et environnement
Sciences naturelles et génie > Sciences appliquées > Océanographie
Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales
Mots-clés:blue carbon, seagrass, Zostera marina, carbon storage, herbier, Zostères, séquestration de carbone
Déposé le:26 févr. 2019 23:30
Dernière modification:01 mai 2019 04:10
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