Size-related photosynthetic characteristics of phytoplankton during periods of seasonal mixing and stratification in an oligotrophic multibasin lake system |
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| Authors: | Frenette Jean-Jacques; Demers Serge; Legendre Louis; Boule Michel |
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| Institution: | 1Département de biologie, Université Laval Ste-Foy (Québec), GIK 7P4, Canada
2Institute Maurice-Lamontagne Ministère des P ches et Océans, 850 Route de la Mer, Mont-Joli, Québec, G5H 3Z4, Canada
3Present address: INRS-Océanoiogie, Université du Québec 310 aliée des Ursulines, Rimouskl, Québec, G5L 3A1, Canada |
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| Abstract: | Phytoplankton photosynthetic responses were studied in two basinsof an oligotrophic lake (Québec, Canada). which are characterizedby the absence (shallow Basin 1) and presence (deeper Basin2) of seasonal thermal stratification. Size-fractionated photosynthesiswas used to characterize changes in phytoplankton characteristicsduring periods of seasonal mixing and stratification. Seasonalvariations of P max showed size-related differences, with maximumvalues in July for the picoplankton and in November for thenanoplankton. Similar patterns of variability in |
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