FN Archimer Export Format
PT J
TI Eutrophication modelling chain for improved management strategies to prevent algal blooms in the Bay of Seine
BT 
AF PASSY, Paul
   LE GENDRE, Romain
   GARNIER, Josette
   CUGIER, Philippe
   CALLENS, Julie
   PARIS, Francois
   BILLEN, Gilles
   RIOU, Philippe
   ROMERO, Estela
AS 1:1,2,3;2:4,8;3:1,2,5;4:6;5:1,2;6:4,7;7:1,2,5;8:4;9:1,2;
FF 1:;2:PDG-RBE-LEADNC;3:;4:PDG-ODE-DYNECO-LEBCO;5:;6:;7:;8:PDG-ODE-LITTORAL-LERN;9:;
C1 CNRS, 4 Pl Jussieu, F-75005 Paris, France.
   Univ Paris 06, FIRE FR 3020, 4 Pl Jussieu, F-75005 Paris, France.
   Natl Univ Singapore, Dept Geog, 1 Arts Link, Singapore 117570, Singapore.
   IFREMER, LER N, Ave Gen Gaulle, F-14520 Port En Bessin, France.
   Univ Paris 06, UMR 7619, 4 Pl Jussieu, F-75005 Paris, France.
   IFREMER, Ctr Bretagne, Dyneco LEBCO, CS 10070, F-29280 Plouzane, France.
   Bur Rech Geol & Minieres, Coastal Risks & Climate Change Unit, Risks & Prevent Div, 3 Av C Guillemin,BP 36009, Orleans 45, France.
   IFREMER, Unite Rech Lagons Ecosyst & Aquaculture Durable L, BP 2059, Noumea 98846, New Caledonia.
C2 CNRS, FRANCE
   UNIV PARIS 06, FRANCE
   UNIV NATL SINGAPORE, SINGAPORE
   IFREMER, FRANCE
   UNIV PARIS 06, FRANCE
   IFREMER, FRANCE
   BRGM, FRANCE
   IFREMER, FRANCE
SI NOUMEA
   BREST
   PORT-EN-BESSIN
SE PDG-RBE-LEADNC
   PDG-ODE-DYNECO-LEBCO
   PDG-ODE-LITTORAL-LERN
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-p187
   copubli-univ-france
   copubli-int-hors-europe
IF 2.292
TC 41
UR https://archimer.ifremer.fr/doc/00300/41103/41542.pdf
LA English
DT Article
DE ;Eutrophication;Harmful algal blooms;Nutrient load;Modelling;Water quality;Seine
AB Eutrophication of the Seine estuary and the Bay of the Seine is a crucial environmental issue for the management of ecosystems and economic activities related to fisheries and tourism. A large quantity of nutrients, especially nitrogen, is brought to the coastal zone by the Seine River, the main input of that area, but also by smaller rivers along the Normandy coast. This large delivery of nitrogen leads to an imbalance between nitrogen (N), phosphorus (P) and silica (Si), which affects the growth of planktonic organisms and can exacerbate the occurrence of harmful algal blooms (HABs). These events can be damaging for shellfish fisheries, an important economic resource for the region. The study describes a new modelling chain coupling a riverine and a marine model (the Seneque/Riverstrahler and the ECOMARS-3D, respectively), which allows us to explore the effects on the coast of two scenarios of watershed management. The first one, focused on an upgrade of wastewater treatment plants, decreases the P fluxes by 5–35 kgP km-2 yr-1 on average over the 2000–2006 period, depending on the watershed, and would reduce about three fold the concentration of dinoflagellates in the adjacent coastal zone. The second one explores a hypothetical scenario of generalisation of organic farming on all agricultural areas of the basin. Although this is not realistic, it shows the best theoretical results we can achieve. With this scenario the N fluxes decrease by almost 50%, and the dinoflagellate blooms and thus possibly the Dinophysis sp. blooms are drastically reduced by a factor of 20–40. Nevertheless, diatoms, which are the main primary producers in the bay and sustain the marine food web, are not significantly affected by this drastic scenario.
PY 2016
PD FEB
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-research
VL 543
UT 000370178100007
BP 107
EP 125
DI 10.3354/meps11533
ID 41103
ER

EF