Role of carbonate burial in Blue Carbon budgets.

ABSTRACT: Calcium carbonates (CaCO₃) often accumulate in mangrove and seagrass sediments. As CaCO₃ production emits CO₂, there is concern that this may partially offset the role of Blue Carbon ecosystems as CO₂ sinks through the burial of organic carbon (C_org). A global collection of data on inorganic carbon burial rates (C_inorg, 12% of CaCO₃ mass) revealed global rates of 0.8 TgC_inorg yr^-1 and 15-62 TgC_inorg yr^-1 in mangrove and seagrass ecosystems, respectively. In seagrass, CaCO₃ burial may correspond to an offset of 30% of the net CO₂ sequestration. However, a mass balance assessment highlights that the C_inorg burial is mainly supported by inpu

SUBMITTER: Saderne V 

PROVIDER: S-EPMC6405941 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature