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| Labry, Claire; Herbland, Alain; Delmas, Daniel; Laborde, P; Lazure, Pascal; Froidefond, J; Jegou, Anne-marie; Sautour, B. |
| Thermostratification and seasonal Light increase are generally considered the first causes of phytoplankton spring blooms in temperate waters. The objective of this study is to confirm the existence of winter phytoplankton blooms, responsible for the early exhaustion of phosphate, within the Gironde plume waters (southeast Bay of Biscay), and to understand what may initiate them so early. Two cruises, BIOMET 2 and BIOMET 3, were carried out respectively in early (8 to 21 January) and late winter 1998 (25 February to 11 March). An increase of phytoplankton biomass (chl a) between the 2 cruises and non-conservative nutrients observed in late winter confirm an early phytoplankton growth both in the Gironde plume and adjacent oceanic waters. Among factors that... |
| Tipo: Text |
Palavras-chave: Vertical attenuation coefficient; Halostratification; Light availability; Winter blooms. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-810.pdf |
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| Gle, C; Del Amo, Y; Bec, B; Sautour, B; Froidefond, J; Gohin, Francis; Maurer, Daniele; Plus, Martin; Laborde, P; Chardy, P. |
| 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... |
| Tipo: Text |
Palavras-chave: Macrotidal ecosystem; Phytoplankton inoculum; Onset; Winter blooms. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3513.pdf |
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