Salt marshes, the coastal wetlands flooded by seawater, play a significant role in trapping and storing carbon, boasting rates approximately 40 times higher than terrestrial forests. This capacity has led to optimism regarding the potential for carbon store recovery as these marshes expand in certain regions.
However, a recent study has indicated that this recovery is not sufficient to fully compensate for the carbon lost from destroyed older wetlands. The research highlights a critical distinction between the expansion of salt marshes and the restoration of their historical carbon sequestration capabilities.
Scientists were hopeful that the increasing extent of salt marshes might signify a complete rebound of their carbon stores. The findings suggest that while salt marshes are valuable, the destruction of mature wetland ecosystems represents a substantial and ongoing loss of stored carbon that current expansion may not entirely mitigate.
Source: Mongabay