FN Archimer Export Format PT J TI Seasonal variation of riverine nutrient inputs in the northern Bay of Biscay (France), and patterns of marine phytoplankton response BT AF GUILLAUD, Jean-Francois AMINOT, Alain DELMAS, Daniel GOHIN, Francis LUNVEN, Michel LABRY, Claire HERBLAND, Alain AS 1:1;2:1;3:2;4:1;5:1;6:1;7:3; FF 1:PDG-DOP-DCB-DYNECO-PELAGOS;2:PDG-DOP-DCB-DYNECO-PELAGOS;3:PDG-DOP-DCB-DYNECO-PELAGOS;4:PDG-DOP-DCB-DYNECO-PELAGOS;5:PDG-DOP-DCB-DYNECO-PELAGOS;6:PDG-DOP-DCB-DYNECO-PELAGOS;7:PDG-DOP-DCOP-AQNC; C1 IFREMER, Dept DYNECO, F-29280 Plouzane, France. IFREMER, Dept AGSAE, F-17137 Houmeau, France. IFREMER, Dept AQUACAL, F-98846 New Caledonia, France. C2 IFREMER, FRANCE IFREMER, FRANCE IFREMER, FRANCE SI BREST SAINT VINCENT SE PDG-DOP-DCB-DYNECO-PELAGOS PDG-DOP-DCOP-AQNC IN WOS Ifremer jusqu'en 2018 IF 2.255 TC 35 UR https://archimer.ifremer.fr/doc/2007/publication-2354.pdf LA English DT Article CR GASPROD 1 GASPROD 2 NUTRIGAS VILOIR BO Thalassa CĂ´tes De La Manche DE ;Northern Bay of Biscay;phytoplankton;continental shelf;riverine inputs;Nutrients AB Seasonal variations in nutrient inputs are described for the main rivers (Loire and Vilaine) flowing into the northern Bay of Biscay. The river plumes are high in N/P ratio in late winter and spring, but not in the inner plume during the summer. Conservative behavior results in most nutrients entering the estuary and eventually reaching the coastal zone. Temporal and spatial aspects of phytoplankton growth and nutrient uptake in the northern Bay of Biscay distinguish the central area of salinity 34 from the plume area. The first diatom bloom appears offshore in late winter, at the edge of the river plumes, taking advantage of haline stratification and anticyclonic "weather windows." In spring, when the central area of the northern shelf is phosphorus-limited, small cells predominate in the phytoplankton community and compete with bacteria for both mineral and organic phosphorus. At that period, river plumes are less extensive than in winter, but local nutrient enrichment at the river mouth allows diatom growth. In summer, phytoplankton become nitrogen-limited in the river plumes; the central area of the shelf is occupied by small forms of phytoplankton, which are located on the thermocline and use predominantly regenerated nutrients. PY 2008 PD JUN SO Journal of Marine Systems SN 0924-7963 PU Elsevier VL 72 IS 1-4 UT 000256816400022 BP 309 EP 319 DI 10.1016/j.jmarsys.2007.03.010 ID 2354 ER EF