FN Archimer Export Format PT J TI Typology of environmental conditions at the onset of winter phytoplankton blooms in a shallow macrotidal coastal ecosystem, Arcachon Bay (France) BT AF GLE, C DEL AMO, Y BEC, B SAUTOUR, B FROIDEFOND, J GOHIN, Francis MAURER, Daniele PLUS, Martin LABORDE, P CHARDY, P AS 1:1;2:1;3:1;4:1;5:2;6:3;7:4;8:4;9:2;10:1; FF 1:;2:;3:;4:;5:;6:PDG-DOP-DCB-DYNECO-PELAGOS;7:PDG-DOP-LER-LERAR;8:PDG-DOP-LER-LERAR;9:;10:; C1 Univ Bordeaux 1, CNRS, Stn Marine, ECOBIOC,UMR EPOC 5805, F-33120 Arcachon, France. Univ Bordeaux 1, CNRS, ECOBIOC, UMR EPOC 5805, F-33405 Talence, France. IFREMER, Ctr Brest, F-29280 Plouzane, France. IFREMER, F-33120 Arcachon, France. C2 UNIV BORDEAUX, FRANCE UNIV BORDEAUX, FRANCE IFREMER, FRANCE IFREMER, FRANCE SI BREST ARCACHON SE PDG-DOP-DCB-DYNECO-PELAGOS PDG-DOP-LER-LERAR IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 1.897 TC 15 UR https://archimer.ifremer.fr/doc/2007/publication-3513.pdf LA English DT Article DE ;macrotidal ecosystem;phytoplankton inoculum;onset;winter blooms AB Phytoplankton dynamics were assessed in the macrotidal ecosystem of Arcachon Bay through high-frequency surveys over a 5-year period in order to characterize typology of environmental conditions at the onset of the productive period. Temporal variations of hydrological and biological parameters were examined in external and internal waters of the lagoon, during the winter-spring periods from 1999 to 2003. An additional survey was performed during winter-spring 2005 in order to study the vertical structure of the water column. The occurrence of winter phytoplankton blooms between January and March emerged as a recurrent event. The early onset of the productive period is influenced by the biological functioning of adjacent Bay of Biscay oceanic waters. It is hypothesized that under a propitious hydrodynamic regime, phytoplankton inocula from the Bay of Biscay enter in the Arcachon Bay where cells presumably find favourable conditions for their fast development. The timing of the onset of those winter blooms in Arcachon Bay seems to be mainly influenced by the presence of anticyclonic weather conditions (associated with an increase in incident irradiance) during late winter (i.e. by February), while the water column does not show any particular stabilization nor stratification liable to facilitate the onset of these blooms. Moreover, these winter blooms dominated by diatoms led to an early nutrient depletion which could have inevitable consequences on the structuration of the food web during spring and summer. PY 2007 PD NOV SO Journal of plankton research SN 0142-7873 PU Oxford university press VL 29 IS 11 UT 000250827100006 BP 999 EP 1014 DI 10.1093/plankt/fbm074 ID 3513 ER EF