FN Archimer Export Format
PT J
TI Assessing the water quality of the Seine land-to-sea continuum for three agro-food system scenarios
BT 
AF Romero, Estela
   Garnier, Josette
   Billen, Gilles
   Ramarson, Antsiva
   Riou, Philippe
   Le Gendre, Romain
AS 1:1,2;2:1,3;3:1,3;4:1;5:4;6:5;
FF 1:;2:;3:;4:;5:PDG-ODE;6:PDG-RBE-LEADNC;
C1 Sorbonne Université, UMR 7619 Metis, Paris, France
   Global Ecology Unit, CREAF-UAB, Bellaterra, Spain
   CNRS, UMR 7619 Metis, Paris, France
   IFREMER, Département Océanographie et Dynamique Ecosystème, Plouzané, France
   IFREMER, UMR 9220 ENTROPIE (IRD, Univ. Réunion, IFREMER, Univ. Nouvelle-Calédonie, CNRS), Nouméa, New Caledonia
C2 UNIV SORBONNE, FRANCE
   CREAF, SPAIN
   CNRS, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
SI BREST
   NOUMEA
SE PDG-ODE
   PDG-RBE-LEADNC
UM ENTROPIE
IN WOS Ifremer UPR
   WOS Ifremer UMR
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
IF 3.7
TC 0
UR https://archimer.ifremer.fr/doc/00800/91228/96979.pdf
LA English
DT Article
DE ;scenarios;biogeochemical processes;estuary;eutrophication;agro-food system
AB Three scenarios for the future of the French agro-food system were specified for the territory draining into the Seine Bight, comprising Paris megacity and the Seine watershed. The first scenario assumes the pursuit of the current trend of opening and specialization of agriculture, as well as of concentration of population within the Paris agglomeration. The second scenario assesses the generalization of agro-ecological practices and a healthier human diet. A third, hybrid, scenario was elaborated assuming that agro-ecological practices were implemented in some protected areas (namely Regional Natural Parks and drinking water protection areas, making up about one-third of the total watershed area), while the rest of the territory will follow the trends of the first scenario. We use a unique modelling chain (GRAFS-Riverstrahler-ECOMARS3D) that couples the biogeochemical functioning of the river basin, the estuary and the adjacent bay. It allows exploring the implications of changes in terrestrial activities throughout the aquatic continuum in a consistent way and assessing to what extent changes in population, agricultural practices, food consumption, and sanitation may sustain the current trend of recovery in the Seine River or either increase stress on the system. Results show that only the full agro-ecological scenario would be able to restore good water quality everywhere in the river network, as well as decrease significantly the risks of toxic algal blooms in the coastal zone. Intermediate situations, such as the protection of specific areas, however attractive as a solution, are not enough to offset the impacts of intensive human activities unless the protected areas dedicated to compensating for damage are sufficiently large. 
PY 2022
PD OCT
SO Frontiers In Marine Science
SN 2296-7745
PU Frontiers Media SA
VL 9
UT 000883839900001
DI 10.3389/fmars.2022.1010887
ID 91228
ER

EF