Blue carbon sequestration and storage potential has increased in seagrass sediments from Northern Morocco

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Abstract Driven by the essential role of blue carbon ecosystems in mitigating climate change and by scarce regional data, here we aim to quantify carbon sequestration rates and storage in a Moroccan coastal vegetated ecosystem over time using nuclear approaches. The carbon stocks recorded over the past 60 years ranged from 1.35 to 11.07 Mg C org ha −1 in Merja Kahla and from 3.55 to 54.48 Mg C org ha −1 and from 3.57 to 104.58 Mg C org ha −1 in two cores from Merja Zerga. The highest carbon accumulation rates were observed in the top 5 cm of sediment cores, ranging from 14.60 to 53.08 g OC m −2 yr −1 , suggesting a noticeable increase in recent years. These findings highlight the need to integrate blue carbon ecosystems into national policies as nature-based solutions for mitigating climate change and for enhancing the management and conservation of coastal and marine resources threatened by human activities.

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