Mangrove production and carbon sinks: a revision of global budget estimates

[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

Borges, Alberto

Castañeda-Moya, Edward

Diele, Karen

Dittmar, Thorsten

Duke, Norman C.

Kristensen, Erik

Lee, Shing Y.

Marchand, Cyril

Middelburg, Jack J.

More authors (3 more)

Language :

English

Title :

Mangrove production and carbon sinks: a revision of global budget estimates

Publication date :

2008

Journal title :

Global Biogeochemical Cycles

ISSN :

0886-6236

eISSN :

1944-9224

Publisher :

American Geophysical Union, Washington, United States - District of Columbia

Volume :

Issue :

GB2013

Pages :

1-12

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 17 December 2008

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881

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766

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636

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1152

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