[en] Mangrove forests are highly productive but globally threatened coastal ecosystems,
whose role in the carbon budget of the coastal zone has long been debated. Here we
provide a comprehensive synthesis of the available data on carbon fluxes in mangrove
ecosystems. A reassessment of global mangrove primary production from the literature
results in a conservative estimate of 218 ± 72 Tg C a 1. When using the best available
estimates of various carbon sinks (organic carbon export, sediment burial, and
mineralization), it appears that >50% of the carbon fixed by mangrove vegetation is
unaccounted for. This unaccounted carbon sink is conservatively estimated at 112 ±
85 Tg C a 1, equivalent in magnitude to 30–40% of the global riverine organic carbon
input to the coastal zone. Our analysis suggests that mineralization is severely
underestimated, and that the majority of carbon export from mangroves to adjacent waters
occurs as dissolved inorganic carbon (DIC). CO2 efflux from sediments and creek
waters and tidal export of DIC appear to be the major sinks. These processes are
quantitatively comparable in magnitude to the unaccounted carbon sink in current budgets,
but are not yet adequately constrained with the limited published data available so far.
Research Center/Unit :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Bouillon, Steven; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
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