FN Archimer Export Format
PT J
TI Modelling nitrogen, primary production and oxygen in a Mediterranean lagoon. Impact of oysters farming and inputs from the watershed
BT 
AF CHAPELLE, Annie
   MENESGUEN, Alain
   DESLOUS-PAOLI, Jean-Marc
   SOUCHU, Philippe
   MAZOUNI, Nabila
   VAQUER, André
   MILLET, Bertrand
AS 1:;2:;3:;4:;5:;6:;7:;
FF 1:PDG-DEL-EC-PP;2:PDG-DEL-EC;3:PDG-DRV-RA-LPALAVAS;4:PDG-DEL-ST;5:;6:;7:;
C1 IFREMER, DEL Brest, F-29280 Plouzane, France.
   IFREMER, F-34203 Sete, France.
   Univ Montpellier 2, Lab Hydrol Marine, F-34095 Montpellier, France.
   Univ Aix Marseille 2, COM, Marine Endoume Stn, F-13007 Marseille, France.
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   UNIV MONTPELLIER 2, FRANCE
   UNIV AIX MARSEILLE 2, FRANCE
SI BREST
   PALAVAS
   SETE
SE PDG-DEL-EC-PP
   PDG-DEL-EC
   PDG-DRV-RA-LPALAVAS
   PDG-DEL-ST
   PDG-DRV-RH-LSETE
IN WOS Ifremer jusqu'en 2018
   copubli-univ-france
IF 0.849
TC 137
UR https://archimer.ifremer.fr/doc/2000/publication-725.pdf
LA English
DT Article
DE ;Oxygen;Nitrogen;Oysters;Primary production;Box model;Lagoon ecosystem
AB An ecosystem model based on nitrogen cycling and oxygen has been developed for the Thau lagoon. It takes into account the specific features of this Mediterranean lagoon, a semi-confined system with watershed inputs and oyster farming. The ecosystem model uses currents calculated by a two-dimensional hydrodynamic model and integrated into a box model. This model is compared with a year survey data and used to estimate nitrogen and oxygen fluxes between the different ecosystem compartments. The yearly simulation shows that the ecosystem behavior is driven by meteorological forcing, especially rain which causes watershed inputs. These inputs trigger microphytoplankton growth, which is responsible for new primary production. During dry periods, nitrogen is recycled into the lagoon thanks to oysters excretion, sediment release, microzooplankton excretion and mineralization. Ammonium produced in this way is consumed by a population of pico- and nanophytoplankton causing regenerated primary production. Consequently, the ecosystem remains highly productive in summer even without external inputs. Shellfish farming also plays an important role in the whole lagoon through biodeposition. Driven by biodeposition, sediment release is the major source of nitrogen in the water column and causes oxygen reduction. The oysters contribute to the recycling activity by excretion, which supports the regenerated primary production. They are also involved in oxygen consumption by respiration which can cause local hypoxia. Further improvements are proposed before this model may become a functional environmental model for a lagoon ecosystem. 
PY 2000
PD MAR
SO Ecological Modelling
SN 0304-3800
PU Elsevier
VL 127
IS 2-3
UT 000086180800004
BP 161
EP 181
DI 10.1016/S0304-3800(99)00206-9
ID 725
ER

EF