Implementation of an end-to-end model of the Gulf of Lions ecosystem (NW Mediterranean Sea). I. Parameterization, calibration and evaluation

Type Article
Date 2019-06
Language English
Author(s) Bănaru Daniela1, Diaz Fréderic1, Verley Philippe2, Campbell Rose3, Navarro Jonathan1, Yohia Christophe1, Oliveros-Ramos Ricardo4, Mellon Capucine5, Shin Yunne-Jai6
Affiliation(s) 1 : Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO UM 110, Mediterranean Institute of Oceanography, Marseille, France
2 : IRD, UMR 123 AMAP, TA40 PS2, Boulevard de la Lironde, 34398 Montpellier Cedex 5, France
3 : Ecole d’Ingénieurs en Génie des Systèmes Industriels (EIGSI). 26, rue François de Vaux de Foletier, 17041 La Rochelle cedex 1, France
4 : Instituto del Mar del Perú (IMARPE), Gamarra y General Valle s/n Chucuito, Callao, Peru
5 : UMR MARBEC (IFREMER, IRD, UM, CNRS), 34203 Sète cedex, France
6 : IRD, UMR 248 MARBEC, Université de Montpellier, Bat. 24 – CC 093 Place Eugène Bataillon 34095 Montpellier Cedex 5, France
Source Ecological Modelling (0304-3800) (Elsevier BV), 2019-06 , Vol. 401 , P. 1-19
DOI 10.1016/j.ecolmodel.2019.03.005
WOS© Times Cited 10
Keyword(s) Ecosystem modeling, Food web, Fisheries, OSMOSE, Eco3M

An end-to-end model named OSMOSE-GoL has been built for the Gulf of Lions, the main French Mediterranean fishing area. This spatialized dynamic model links the coupled hydrodynamic and biogeochemical model Eco3M-S/SYMPHONIE (LTL – low trophic level model) to OSMOSE (HTL – high trophic level model). It includes 15 compartments of living organisms, five from the LTL model (i.e. nanophytoplankton, microphytoplankton, nanozooplankton, microzooplankton and mesozooplankton) and ten from the HTL model (northern krill, southern shortfin squid, European pilchard, European anchovy, European sprat, Atlantic horse mackerel, Atlantic mackerel, blue whiting, European hake and Atlantic bluefin tuna). With the exception of northern krill and European sprat, all HTL species are commercially exploited and undergo fisheries mortality pressure. The modeled species represent more than 70% of annual catches in this area. This paper presents the parameterization, calibration and evaluation of this model with satellite data for phytoplankton and with biomass, landings, diet and trophic level data for HTL groups. For most species, the diets in output of OSMOSE-GoL are similar to field and literature data in terms of dominant prey groups and species. However, some differences were observed. Various reasons may explain the mismatch between the modeled diet and field data. Benthic prey sometimes observed in the stomach content of the HTL predators were not modeled in OSMOSE-GoL. Field studies were carried out at specific periods and locations, while our data concern the period 2001–2004 and the entire modeled domain. Inter- and intra-annual variations in spatial distribution and density of prey may also explain these differences. The model estimates trophic level values similar to those cited in the literature for all the HTL compartments. These values are also close to the trophic levels estimated by a previous Ecopath model for the same area and period. Even though some improvements are still possible, this model may already be of use to explore fishery or Marine Protected Areas scenarios for socio-ecosystem management issues.

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Bănaru Daniela, Diaz Fréderic, Verley Philippe, Campbell Rose, Navarro Jonathan, Yohia Christophe, Oliveros-Ramos Ricardo, Mellon Capucine, Shin Yunne-Jai (2019). Implementation of an end-to-end model of the Gulf of Lions ecosystem (NW Mediterranean Sea). I. Parameterization, calibration and evaluation. Ecological Modelling, 401, 1-19. Publisher's official version : , Open Access version :