FN Archimer Export Format
PT J
TI How to avoid eutrophication in coastal seas? A new approach to derive river-specific combined nitrate and phosphate maximum concentrations
BT 
AF MENESGUEN, Alain
   DESMIT, Xavier
   DULIERE, Valerie
   LACROIX, Genevieve
   THOUVENIN, Benedicte
   THIEU, Vincent
   DUSSAUZE, Morgan
AS 1:1;2:2;3:2;4:2;5:1;6:3;7:4;
FF 1:PDG-ODE-DYNECO-LEBCO;2:;3:;4:;5:PDG-ODE-DYNECO-DHYSED;6:;7:;
C1 French Res Inst Explorat Sea IFREMER, Dept Coastal Environm Dynam DYNECO, Ctr Bretagne, BP 70, F-29280 Plouzane, France.
   Operat Directorate Nat Environm DO Nat, RBINS, Gulledelle 100, B-1200 Brussels, Belgium.
   Univ Paris 06, Sorbonne Univ, UMR METIS 7619, UPMC,CNRS,EPHE, Paris, France.
   ACTIMAR, 36 Quai Douane, F-29200 Brest, France.
C2 IFREMER, FRANCE
   ROYAL BELGIAN INST NAT SCI, BELGIUM
   UNIV PARIS 06, FRANCE
   ACTIMAR, FRANCE
SI BREST
SE PDG-ODE-DYNECO-LEBCO
   PDG-ODE-DYNECO-DHYSED
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
IF 5.589
TC 44
UR https://archimer.ifremer.fr/doc/00426/53774/54661.pdf
LA English
DT Article
DE ;Marine eutrophication;Ecosystem modelling;Nutrient reduction scenario;Linear optimization;Good ecological status;EU policies
AB Since 1950, increase in nitrogen (N) and phosphorus (P) river loadings in the North-East Atlantic (NEA) continental seas has induced a deep change in the marine coastal ecosystems, leading to eutrophication symptoms in some areas. In order to recover a Good Ecological Status (GES) in the NEA, as required by European Water Framework Directive (WFD) and Marine Strategy Framework Directive (MSFD), reductions in N- and P-river loadings are necessary but they need to be minimal due to their economic impact on the farming industry. In the frame of the “EMoSEM” European project, we used two marine 3D ecological models (ECO-MARS3D, MIRO&CO) covering the Bay of Biscay, the English Channel and the southern North Sea to estimate the contributions of various sources (riverine, oceanic and atmospheric) to the winter nitrate and phosphate marine concentrations. The various distributed descriptors provided by the simulations allowed also to find a log-linear relationship between the 90th percentile of satellite-derived chlorophyll concentrations and the “fully bioavailable” nutrients, i.e. simulated nutrient concentrations weighted by light and stoichiometric limitation factors. Any GES threshold on the 90th percentile of marine chlorophyll concentration can then be translated in maximum admissible ‘fully bioavailable’ DIN and DIP concentrations, from which an iterative linear optimization method can compute river-specific minimal abatements of N and P loadings. The method has been applied to four major river groups, assuming either a conservative (8 μg Chl L−1) or a more socially acceptable (15 μg Chl L−1) GES chlorophyll concentration threshold. In the conservative case, maximum admissible winter concentrations for nutrients correspond to marine background values, whereas in the lenient case, they are close to values recommended by the WFD/MSFD. Both models suggest that to reach chlorophyll GES, strong reductions of DIN and DIP are required in the Eastern French and Belgian-Dutch river groups. 
PY 2018
PD JUN
SO Science Of The Total Environment
SN 0048-9697
PU Elsevier Science Bv
VL 628-629
UT 000432462000043
BP 400
EP 414
DI 10.1016/j.scitotenv.2018.02.025
ID 53774
ER

EF