FN Archimer Export Format
PT J
TI Pelagic stocks and carbon and nitrogen uptake in a pearl farming atoll (Ahe, French Polynesia)
BT 
AF Rodier, Martine
   Pinazo, Christel
   Seceh, Claire
   Varillon, David
AS 1:1,3;2:1;3:1;4:2;
FF 1:;2:;3:;4:;
C1 Aix-Marseille Université, Université de Toulon, IRD, CNRS, Mediterranean Institute of Oceanography (MIO), UM 110, 13288 Marseille, France
   Institut de Recherche pour le Développement, US 191 IMAGO, BP A5, 98848 Nouméa cedex, New-Caledonia, 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
C2 UNIV AIX MARSEILLE, FRANCE
   IRD, FRANCE
   IRD, FRANCE
UM EIO
IN WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 7.001
TC 5
UR https://archimer.ifremer.fr/doc/00689/80142/93574.pdf
LA English
DT Article
DE ;Nitrogen uptake;Primary production;Phytoplankton composition;Atoll lagoon;Pearl farming;French Polynesia
AB This study reports the first measurements of nitrogen uptake and new data on carbon fixation (15N/13C incorporation) for two size-fractionated phytoplankton (<2 μm and >2 μm), on organic matter, and phytoplankton stocks in Ahe lagoon. Data were collected between November and December 2017, during the hot season with prevailing trade winds. Ammonium and nitrate uptake data (7.58 to 39.81 and 1.80 to 21.43 μmol N m−3 h−1, respectively) suggest a rapid turn-over of N-nutrients in the water column and show that primary production was largely sustained by recycled nitrogen providing 68% of the pelagic N demand. These results highlight the spatial heterogeneity of the measured processes linked to the local hydrodynamics, exhibiting higher regenerated production in the more exploited southwestern part of the lagoon and a higher proportion of new production in the north. Intense nutrient recycling appears to promote nanophytoplankton production which is critical for pearl oyster growth. 
PY 2021
PD JUL
SO Marine Pollution Bulletin
SN 0025-326X
PU Elsevier BV
VL 167
UT 000656474000003
DI 10.1016/j.marpolbul.2021.112352
ID 80142
ER

EF