FN Archimer Export Format
PT J
TI Phytoplankton versus macrophyte contribution to primary production and biogeochemical cycles of a coastal mesotidal system. A modelling approach
BT 
AF PLUS, Martin
   AUBY, Isabelle
   MAURER, Daniele
   TRUT, Gilles
   DEL AMO, Y.
   DUMAS, Franck
   THOUVENIN, Benedicte
AS 1:1;2:2;3:2;4:2;5:3;6:4;7:4;
FF 1:PDG-ODE-DYNECO-PELAGOS;2:PDG-ODE-LITTORAL-LERAR;3:PDG-ODE-LITTORAL-LERAR;4:PDG-ODE-LITTORAL-LERAR;5:;6:PDG-ODE-DYNECO-PHYSED;7:PDG-ODE-DYNECO-PHYSED;
C1 IFREMER, DYNECO PELAGOS, F-29280 Plouzane, France.
   IFREMER, LER AR, F-33120 Arcachon, France.
   Univ Bordeaux, UMR EPOC, F-33615 Pessac, France.
   IFREMER, DYNECO PHYSED, F-29280 Plouzane, France.
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   UNIV BORDEAUX, FRANCE
   IFREMER, FRANCE
SI BREST
   ARCACHON
SE PDG-ODE-DYNECO-PELAGOS
   PDG-ODE-LITTORAL-LERAR
   PDG-ODE-DYNECO-PHYSED
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.335
TC 11
UR https://archimer.ifremer.fr/doc/00278/38963/37503.pdf
   https://archimer.ifremer.fr/doc/00278/38963/37543.pdf
LA English
DT Article
BO Planula IV
DE ;Primary production;Macrophyte;Phytoplankton;Biogeochemical cycle;Physical-ecological coupled model;Arcachon bay
AB This study presents an assessment of the contributions of various primary producers to the global annual production and N/P cycles of a coastal system, namely the Arcachon Bay, by means of a numerical model. This 3D model fully couples hydrodynamic with ecological processes and simulates nitrogen, silicon and phosphorus cycles as well as phytoplankton, macroalgae and seagrasses. Total annual production rates for the different components were calculated for different years (2005, 2007 and 2009) during a time period of drastic reduction in seagrass beds since 2005. The total demand of nitrogen and phosphorus was also calculated and discussed with regards to the riverine inputs. Moreover, this study presents the first estimation of particulate organic carbon export to the adjacent open ocean.  The calculated annual net production for the Arcachon Bay (except microphytobenthos, not included in the model) ranges between 22,850 and 35,300 tons of carbon. The main producers are seagrasses in all the years considered with a contribution ranging from 56% to 81% of global production. According to our model, the -30% reduction in seagrass bed surface between 2005 and 2007, led to an approximate 55% reduction in seagrass production, while during the same period of time, macroalgae and phytoplankton enhanced their productions by about +83% and +46% respectively. Nonetheless, the phytoplankton production remains about eightfold higher than the macroalgae production. Our results also highlight the importance of remineralisation inside the Bay, since riverine inputs only fulfill at maximum 73% nitrogen and 13% phosphorus demands during the years 2005, 2007 and 2009. Calculated advection allowed a rough estimate of the organic matter export: about 10% of the total production in the bay was exported, originating mainly from the seagrass compartment, since most of the labile organic matter was remineralised inside the bay.
PY 2015
PD NOV
SO Estuarine Coastal And Shelf Science
SN 0272-7714
PU Academic Press Ltd- Elsevier Science Ltd
VL 165
UT 000367119500007
BP 52
EP 60
DI 10.1016/j.ecss.2015.09.003
ID 38963
ER

EF