FN Archimer Export Format
PT J
TI Ecosystem modelling in the Northwestern Mediterranean Sea: Structure and functioning of a complex system
BT 
AF Seyer, Thomas
   Bănaru, Daniela
   Vaz, Sandrine
   Hattab, Tarek
   Labrune, Céline
   Booth, Shawn
   Charmasson, Sabine
AS 1:1,2;2:2;3:3;4:3;5:4;6:2;7:1;
FF 1:;2:;3:PDG-RBE-MARBEC-LHM;4:PDG-RBE-MARBEC-LHM;5:;6:;7:;
C1 IRSN, Institut de Radioprotection et de Sûreté Nucléaire, PSE-ENV/SRTE/LRTA, BP3, F-13115 Saint Paul Lez Durance, France
   Aix-Marseille Université, Université de Toulon, CNRS, IRD, MIO UM110, Mediterranean Institute of Oceanography, Marseille, France
   MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
   CNRS, Sorbonne Université, LECOB, UMR 8222, Observatoire Océanologique, F-66650 Banyuls-sur-Mer, France
C2 IRSN, FRANCE
   UNIV AIX MARSEILLE, FRANCE
   IFREMER, FRANCE
   CNRS, FRANCE
SI SETE
SE PDG-RBE-MARBEC-LHM
UM MARBEC
IN WOS Ifremer UMR
   copubli-france
   copubli-univ-france
IF 2.8
TC 2
UR https://archimer.ifremer.fr/doc/00825/93674/100462.pdf
LA English
DT Article
CR APPEAL MED 2018
   MEDITS
   PELMED - PELAGIQUES MEDITERRANÉE
   REDIT2010
BO Téthys II
DE ;Ecopath;Trophic structure;Modelling;Mediterranean;Gulf of Lion
AB Ecopath mass-balanced models are widely-used tools to address various challenges in the understanding and protection of ecosystems. To track the continuing improvements in data and the evolving environment (climate change, anthropic pressure), new models are regularly being developed. In this study, we built a Gulf of Lion Ecopath model, focused on the continental shelf, featuring enhanced representation of benthic invertebrates and a realistic assessment of catches, and which takes into account the significant changes observed after 2008–2009 in the trophic structure of this ecosystem as well as related changes in fisheries activities. The model is composed of 68 functional groups, including 6 primary producers, discards and detritus, 27 invertebrate groups, 31 fish groups, dolphins and seabirds. New datasets were taken into account for biomasses, as well as for diets. P/B and Q/B parameters were calculated to include the most recent and geographically closest data. Model results highlight a food web diagram, ranging over 5 trophic levels and placing Prionace glauca, Squalus acanthias and dolphins as top predators. The mixed trophic impact analysis showed that the groups with the highest accumulated negative impacts are, in decreasing order, benthic trawls, nets and carnivorous echinoderms. The groups with the highest accumulated positive impacts are, in decreasing order, detritus, microphytoplankton and nanoplankton. The flux analysis shows that a major part of the flows occurs at trophic level 2 with 35.1% of the model total throughput and 43.8% of the total biomass. The catches have a mean trophic level of 3.47, higher than in previous studies, reflecting the changes in the fisheries activities. 
PY 2023
PD MAY
SO Journal Of Marine Systems
SN 0924-7963
PU Elsevier BV
VL 240
UT 000959744500001
DI 10.1016/j.jmarsys.2023.103877
ID 93674
ER

EF