FN Archimer Export Format
PT J
TI Diversity and stability of an estuarine trophic network
BT 
AF LOBRY, Jeremy
   DAVID, V
   PASQUAUD, S
   LEPAGE, M
   SAUTOUR, B
   ROCHARD, E
AS 1:1;2:2;3:3;4:3;5:2;6:3;
FF 1:PDG-DOP-DCN-EMH;2:;3:;4:;5:;6:;
C1 IFREMER, Ctr Nantes, Dept EMH, F-44311 Nantes 3, France.
   Univ Bordeaux 1, CNRS, Lab Oceanog Biol, UMR 5805, F-33120 Arcachon, France.
   Cemagref, Grp Bordeaux, Unite Ecosyst Estuariens & Poissons Migrateurs Am, F-33612 Cestas, France.
C2 IFREMER, FRANCE
   UNIV BORDEAUX, FRANCE
   CEMAGREF, FRANCE
SI NANTES
SE PDG-DOP-DCN-EMH
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-p187
   copubli-univ-france
IF 2.631
TC 85
UR https://archimer.ifremer.fr/doc/2008/publication-4290.pdf
LA English
DT Article
DE ;Gironde estuary;Ecopath;Diversity;Stability;Network analysis;Food web;Estuarine ecosystem
AB Estuarine areas provide highly valuable ecosystem benefits for human populations, despite being under intense demographic, economic and ecological pressures. Hence, an understanding of the structure and function of estuarine ecosystems is essential for understanding the persistence and stability of these ecosystems and their response to perturbations. This study synthesises available data and knowledge about the Gironde estuary (SW France) in a mass-balanced trophic model to illustrate potential key patterns in the functioning of the estuarine ecosystem and key elements of its stability. In order to evaluate the total direct and indirect impact on the whole community of the 2 main sources of anthropogenic perturbations in the estuarine area, mortalities induced by fishing and the Blayais nuclear power plant were included in the model. The results suggest that in the Gironde, a typical heterotrophic estuary, there is an asymmetrical flow between distinct and complementary energy channels that enhances the stability of the food web. This dynamic process is illustrated by differential trophic flows in the water column according to the seasons. The succession of species in the environment indicates an optimisation of the use of the available carbon resources over a typical year by the estuarine biological communities. Finally, it seems that an increase in human impacts could significantly affect the topology and functioning of the food web by altering stabilizing elements of the network and decreasing the diversity of trophic flows that insures resilience of the trophic structure.
PY 2008
PD APR
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-Research
VL 358
UT 000256228300002
BP 13
EP 25
DI 10.3354/meps07294
ID 4290
ER

EF