Short-term variability in physical forcing in temperate reservoirs: effects on phytoplankton dynamics and sedimentary fluxes. - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Freshwater Biology Année : 2007

Short-term variability in physical forcing in temperate reservoirs: effects on phytoplankton dynamics and sedimentary fluxes.

Résumé

1. The effects of wind events on phytoplankton dynamics were investigated in two temperate reservoirs. 2. Meteorological forcing, change in physical and chemical structure of the water column and biological responses of phytoplankton communities were followed for 3 weeks in three seasons. 3. Depending on the season, the phytoplankton response differed in response to nutrient and light conditions, and to the intensity of stratification and mixing. 4. We demonstrated that, on a time scale of a few days, wind events can modify phytoplankton dynamics, in terms of size structure and exported biomass. An increase of mixing favoured the largest size class and disadvantaged the smallest size class, while an increase in stratification had the opposite effects. The short-term change in size structure was reflected in the sedimentary fluxes but with a time lag.
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Dates et versions

hal-00101498 , version 1 (27-09-2006)

Identifiants

  • HAL Id : hal-00101498 , version 1
  • PRODINRA : 251896

Citer

Alexandrine Pannard, Myriam Bormans, Yvan Lagadeuc. Short-term variability in physical forcing in temperate reservoirs: effects on phytoplankton dynamics and sedimentary fluxes.. Freshwater Biology, 2007, 52(1), pp.12-27. ⟨hal-00101498⟩
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