Nature – Fu et al. (2023): Substantial blue carbon sequestration in the world’s largest seagrass meadow

Chuancheng Fu, Sofia Frappi, Michelle Nicole Havlik, Wells Howe, S. David Harris, Elisa Laiolo, Austin J. Gallagher, Pere Masqué, Carlos M. Duarte IN: Communication Earth & Environment, 4, https://doi.org/10.1038/s43247-023-01154-0

Here, the authors sampled 10 seagrass meadows across an extensive island chain in The Bahamas. They estimate that Bahamas seagrass meadows store 0.42–0.59 Pg organic carbon in the top-meter sediments with an accumulation rate of 2.1–2.9 Tg annually, representing a substantial global blue carbon hotspot. Autochthonous organic carbon in sediments decreased from ~1980 onwards, with concomitant increases in cyanobacterial and mangrove contributions, suggesting disturbance of seagrass ecosystems, likely caused by tourism and maritime traffic activities. This study provides seagrass blue carbon data from a vast, understudied region and contributes to improving climate action for The Bahamas and the Greater Caribbean region.

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