||Niquil Nathalie1, Kerleguer G1, Leguerrier D1, Richard Pierre1, Legrand Helene1, Dupuy Christine1, Pascal P1, Bacher Cedric2
||1 : Univ La Rochelle, CNRS, IFREMER, UMR 6217,Ctr Rech Ecosyst Littoraux Anthropises, F-17042 La Rochelle, France.
2 : IFREMER, F-29280 Plouzane, France.
||Cahiers de Biologie Marine (0007-9723) (Station Biologique de Roscoff), 2006 , Vol. 47 , N. 1 , P. 63-71
|WOS© Times Cited
||Intertidal mudflat food web, Pollution, Microphytobenthos, Inverse analysis, Sensitivity analysis
||The presence of herbicides in the run-off water coming over Brouage mudflat (Marennes-Oleron Bay, France) is suspected to cause a loss of primary production by benthic diatom biofilm. Microphytobenthos being the main primary producer of this ecosystem, it was questioned about what could be the effect of such a modification of primary production on the entire food web that depends on it. The probable impacts were investigated through a sensitivity analysis conducted on the steady-state model of the Brouage mudflat, coupling two seasons and trophic-hydrodynamic flows. The loss of benthic primary production had an effect on compartments at a low trophic level, but was buffered at higher levels because of the compensation of herbivory by other pathways and especially detritivory. The consequences seemed more important on physical flows through resuspension and export by advection, but this should be apprehended through dynamic modeling coupling physics and biology.