Reference : Mangrove production and carbon sinks: a revision of global budget estimates
Scientific journals : Article
Life sciences : Aquatic sciences & oceanology
Mangrove production and carbon sinks: a revision of global budget estimates
Bouillon, Steven [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique >]
Borges, Alberto mailto [> > > >]
Castañeda-Moya, Edward [> > > >]
Diele, Karen [> > > >]
Dittmar, Thorsten [> > > >]
Duke, Norman C. [> > > >]
Kristensen, Erik [> > > >]
Lee, Shing Y. [> > > >]
Marchand, Cyril [> > > >]
Middelburg, Jack J. [> > > >]
Rivera-Monroy, Victor H. [> > > >]
Smith III, Thomas J. [> > > >]
Twilley, Robert R. [> > > >]
Global Biogeochemical Cycles
American Geophysical Union
Yes (verified by ORBi)
[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.

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