Salt marshes are typical formations that define estuarine margins, covering regularly or irregularly flooded intertidal areas. Among the various ecosystem services, its great ability to sequester and store carbon from the atmosphere in its substrates stands out, which remain in the sediment from centuries to millennia. The carbon stored in the form of CO2 in coastal and estuarine environments by salt marshes is known as blue carbon. The aim of this study was to investigate the current state of knowledge of carbon stocks in marshes through a systematic bibliographical approach. Three databases were selected: Springer, Science direct and Periódicos Capes. In each database, the search words “tidal salt marsh” and “carbon stock” were applied, using quotation marks in each term and the AND operator. It was noted that in view of the urgency in developing actions that mitigate the effects of climate change, studies having marshes as a theme have gained exponentially attention worldwide, this interest is recent and knowledge about it is still limited and developed only in specific regions of the world. globe . The complexity of these habitats is a theme that is considered and of great importance. Invasive plants alter the dynamics of the carbon cycle in these areas. The heterogeneity of marshes is a crucial factor to be taken into account in studies in order to avoid errors in carbon inventories. Salt marsh restoration activities are considered adapted management approaches, which can transform degraded areas into carbon sinks.
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Environmental Sciences, Aquatic and Coastal Environments.
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