FN Archimer Export Format
PT J
TI Benthic nutrients and oxygen fluxes at the water sediment interface in a pearl farming atoll (Ahe, Tuamotu, French Polynesia)
BT 
AF Grenz, Christian
   Rodier, Martine
   Seceh, Claire
   Varillon, David
   Haumani, Gabriel
   Pinazo, Christel
AS 1:1;2:1,2;3:1;4:3;5:4;6:1;
FF 1:;2:;3:;4:;5:;6:;
C1 Aix-Marseille Université, Université Toulon, CNRS/INSU, IRD, Mediterranean Institute of Oceanography MIO UM 110, Marseille, France
   Institut de Recherche pour le Développement, UMR 241 EIO (Université de la Polynésie française, IRD, ILM, Ifremer), B.P. 6570, 98702 Faa'a, Tahiti, French Polynesia
   Institut de Recherche pour le Développement, US 191 IMAGO, BP A5, 98848 Nouméa cedex, New Caledonia
   Direction des Ressources Marines, Antenne de Takapoto, BP 20, 98713 Papeete, French Polynesia
C2 UNIV AIX MARSEILLE, FRANCE
   IRD, FRANCE
   IRD, FRANCE
   DIRECT RESSOURCES MARINES, FRANCE
UM EIO
IN WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 7.001
TC 3
UR https://archimer.ifremer.fr/doc/00723/83554/88695.pdf
LA English
DT Article
DE ;Benthic nutrient fluxes;Sediment respiration;Phytobenthic production;Atoll lagoon;Pearl farming;French Polynesia
AB Benthic exchanges of oxygen and nutrient at the sediment-water interface were investigated under light and dark conditions at 5 selected sites in a sub-tropical atoll. Mean oxygen fluxes were - 1316.5 ± 242.0 μmol m−2 h−1 and mean effluxes of oxygen under light conditions were 2231.7 ± 626.4 μmol m−2 h−1, presumably due to microphytobenthos present at the sediment-water interface. The consequences of this high related productivity was a systematic consumption of nutrients (DIN, PO4 and Si(OH)4) during almost all light incubations, contrasting with the effluxes of nutrients during dark incubations. Our results suggest that the sediments were net autotrophic and the oxygen balance in favor of microbenthic production when compared to community demand. Diurnal rates of gross benthic primary productivity were high (3423 ± 1192 μmol m−2 h−1) which emphasize the role of microphytobenthos in maintaining the oxygen reservoir in tropical lagoons. 
PY 2021
PD DEC
SO Marine Pollution Bulletin
SN 0025-326X
PU Elsevier BV
VL 173
IS Part A
UT 000706147300006
DI 10.1016/j.marpolbul.2021.112963
ID 83554
ER

EF