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dc.contributor.authorArias-Ortiz, Ariane
dc.contributor.authorMasqué, Pere
dc.contributor.authorGarcia-Orellana, Jordi
dc.contributor.authorSerrano, Oscar
dc.contributor.authorMazarrasa Elosegui, Ines
dc.contributor.authorMarbà, Núria
dc.contributor.authorLovelock, Catherine E.
dc.contributor.authorLavery, Paul S.
dc.contributor.authorDuarte, Carlos M.
dc.contributor.otherUniversidad de Cantabriaes_ES
dc.identifier.otherEstresX CTM2012-32603es_ES
dc.identifier.otherMedShift CGL2015-71809-Pes_ES
dc.description.abstractVegetated coastal ecosystems, including tidal marshes, mangroves and seagrass meadows, are being increasingly assessed in terms of their potential for carbon dioxide sequestration worldwide. However, there is a paucity of studies that have effectively estimated the accumulation rates of sediment organic carbon (Corg), also termed blue carbon, beyond the mere quantification of Corg stocks. Here, we discuss the use of the 210Pb dating technique to determine the rate of Corg accumulation in these habitats. We review the most widely used 210Pb dating models to assess their limitations in these ecosystems, often composed of heterogeneous sediments with varying inputs of organic material, that are disturbed by natural and anthropogenic processes resulting in sediment mixing and changes in sedimentation rates or erosion. Through a range of simulations, we consider the most relevant processes that impact the 210Pb records in vegetated coastal ecosystems and evaluate how anomalies in 210Pb specific activity profiles affect sediment and Corg accumulation rates. Our results show that the discrepancy in sediment and derived Corg accumulation rates between anomalous and ideal 210Pb profiles is within 20% if the process causing such anomalies is well understood. While these discrepancies might be acceptable for the determination of mean sediment and Corg accumulation rates over the last century, they may not always provide a reliable geochronology or historical reconstruction. Reliable estimates of Corg accumulation rates might be difficult at sites with slow sedimentation, intense mixing and/or that are affected by multiple sedimentary processes. Additional tracers or geochemical, ecological or historical data need to be used to validate the 210Pbderived results. The framework provided in this study can be instrumental in reducing the uncertainties associated with estimates of Corg accumulation rates in vegetated coastal sediments.es_ES
dc.description.sponsorshipThis work was funded by the CSIRO Flagship Marine & Coastal Carbon Biogeochemical Cluster (Coastal Carbon Cluster), the Spanish Ministry of Economy and Competitiveness (projects EstresX CTM2012-32603, MedShift CGL2015-71809-P), the Generalitat de Catalunya (MERS 2017 SGR – 1588), the Australian Research Council LIEF Project (LE170100219), the Edith Cowan University Faculty Research Grant Scheme and the King Abdullah University of Science and Technology (KAUST) through baseline funding to Carlos M. Duarte. This work contributes to the ICTA Unit of Excellence (MinECo, MDM2015-0552)es_ES
dc.format.extent28 p.es_ES
dc.publisherCopernicus Publ.es_ES
dc.rightsAttribution 4.0 Internationales_ES
dc.sourceBiogeosciences, 15, 6791-6818, 2018es_ES
dc.titleReviews and syntheses: 210Pb-derived sediment and carbon accumulation rates in vegetated coastal ecosystems-setting the record straightes_ES

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Attribution 4.0 InternationalExcept where otherwise noted, this item's license is described as Attribution 4.0 International