FN Archimer Export Format
PT J
TI Mangrove‐Derived Organic and Inorganic Carbon Exchanges Between the Sinnamary Estuarine System (French Guiana, South America) and Atlantic Ocean
BT 
AF Ray, Raghab
   Thouzeau, Gerard
   Walcker, Romain
   Vantrepotte, Vincent
   Gleixner, Gerd
   Morvan, Sylvain
   Devesa, Jeremy
   Michaud, Emma
AS 1:1;2:1;3:2;4:3,4;5:5;6:4;7:1;8:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 CNRS, Univ Brest, IRD, Ifremer, LEMAR Plouzané ,France
   EcoLab, Univ Toulouse, CNRS, INPT, UPS Toulouse ,France
   LOG, UMR 8187 CNRS, Univ Lille, ULCO, Univ du Littoral Côte d'Opale Wimereux, France
   LEEISA, USR 3456 CNRS, Univ Guyane, Ifremer, Centre de recherche de Montabo Guyane, Française France
   Department of Biogeochemical Processes Max Planck Institute for Biogeochemistry Jena, Germany
C2 CNRS, FRANCE
   UNIV TOULOUSE, FRANCE
   UNIV LITTORAL COTE D'OPALE, FRANCE
   CNRS, FRANCE
   MAX PLANCK INST BIOGEOCHEM, GERMANY
UM LEMAR
   LEEISA
IN WOS Cotutelle UMR
   copubli-france
   copubli-europe
   copubli-univ-france
IF 3.822
TC 16
UR https://archimer.ifremer.fr/doc/00643/75488/76339.pdf
   https://archimer.ifremer.fr/doc/00643/75488/76340.docx
LA English
DT Article
DE ;organic matter;tidal cycle;carbon flux;mangroves;French Guiana
AB There is growing evidence that a substantial fraction of the dissolved organic and inorganic carbon (DOC and DIC) and particulate organic carbon (POC) can be exported from mangroves to the ocean. Yet our understanding of C fluxes in mangrove forests is limited to only few regional studies that exclude the world's longest sediment dispersal system connected to the Amazon River. The present study aims at (1) examining tidal fluctuations of DOC, POC, and DIC; their isotopes; and optical properties such as chromophoric dissolved organic matter (CDOM) and (2) estimating their exchange fluxes between the mangroves and adjacent coastal water in the Sinnamary estuary, French Guiana. Time series observation highlighted that physical processes coupled to tides controlled diel dynamics and sources of DOC (e.g., litter leaching and pore water seepage) and POC (microphytobenthos, sediment resuspension, and bioturbation activities). Intense benthic remineralization could account for high water column pCO2 and DIC exchange flux during the low tide. Mangrove‐derived DOC export to inner shelf (8.14 g C m−2 day−1) was exceeding import of POC and DIC from the mud bank and marine sources to the mangroves (1.35 and 0.90 g C m−2 day−1, respectively). Because of specific dynamics of the Amazon mobile muds, local geomorphology, water column stratification, and environmental forcing, Guianese mangroves cannot be seen as simple C exporters to the Atlantic waters. These first data setting on C fluxes for the region should be included along with other studies to improve global mangrove C budget estimate. 
PY 2020
PD AUG
SO Journal Of Geophysical Research-biogeosciences
SN 2169-8953
PU American Geophysical Union (AGU)
VL 125
IS 8
UT 000612324000013
DI 10.1029/2020JG005739
ID 75488
ER

EF