FN Archimer Export Format
PT J
TI Influence of farmed pearl oysters and associated biofouling communities on nutrient regeneration in lagoons of French Polynesia
BT 
AF LACOSTE, Elise
   GUEGUEN, Yannick
   LE MOULLAC, Gilles
   KOUA, Manaarii Sham
   GAERTNER-MAZOUNI, Nabila
AS 1:1;2:2;3:2;4:2;5:1;
FF 1:;2:PDG-RBE-BOME-LALR;3:PDG-RBE-RMPF;4:PDG-RBE-RMPF;5:;
C1 Univ Polynesie Francaise, UMR 241, Faaa 98702, Tahiti, Fr Polynesia.
   IFREMER, UMR 241, Taravao 98719, Fr Polynesia.
C2 UNIV POLYNESIE FRANCAISE, FRANCE
   IFREMER, FRANCE
SI MONTPELLIER
   TAHITI
SE PDG-RBE-BOME-LALR
   PDG-RBE-RMPF
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.964
TC 18
UR https://archimer.ifremer.fr/doc/00201/31193/29592.pdf
LA English
DT Article
DE ;Pearl oysters;Biofouling;Nutrient flux;Aquaculture impact
AB Bivalve cultivation can significantly contribute to nutrient cycling in semi-enclosed ecosystems. We investigated the influence of suspended pearl oyster culture on nutrient regeneration in the water column of 3 oligotrophic lagoons in French Polynesia. The aim of this first study performed in a tropical area was to assess the seasonal variability of nutrient fluxes and to quantify the contribution of biofouling communities. In situ metabolic enclosure systems were used to measure nutrient uptake or release by ‘cultivation units’ (i.e. 4 pearl oysters with or without associated biofouling). In all 3 study lagoons (Tahiti, Mangareva, Ahe), nutrient fluxes produced by pearl oyster and associated biofouling communities (CR units) were 4- to 6-fold higher than those measured for cleaned pearl oysters. CR units can release dissolved inorganic nitrogen and soluble reactive phosphorus in the water column at a rate of 200 and 50 µmol h-1, respectively. Trophic level and composition of biofouling communities may explain the variations of fluxes observed between the different islands. At the pearl farm scale (Ahe), pearl oyster long-lines may supply 70% of the inorganic nitrogen demand for primary production, with biofouling communities accounting for 60% of the total nutrient release. Pearl oyster culture enhances nutrient availability and alters stoichiometry, which can strongly modify the dynamics of the planktonic ecosystem.
PY 2014
SO Aquaculture Environment Interactions
SN 1869-215X
PU Inter-research
VL 5
IS 3
UT 000345730200002
BP 209
EP 219
DI 10.3354/aei00107
ID 31193
ER

EF