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1 results

  • Spatial and temporal heterogeneity in succession of cyanobacterialblooms in a Spanish reservoir

  • D. Sanchis, D. Carrasco, C. Padilla, F. Leganés, E. Fernández-Valiente, F. F. del Campo, A. Quesada
  • Journal:
    Annales de Limnologie - International Journal of Limnology / Volume 38 / Issue 3 / September 2002
    Published online by Cambridge University Press:
    15 March 2009, pp. 173-183
    Print publication:
    September 2002

  • We describe here the limnological characteristics of the Santillana Reservoir (Spain) and study the phytoplankton distributionduring a typical growing season (July to November). The reservoir is a eutrophic stratified waterbody in central part of Spain,in which the average phytoplankton biomass in summer is higher than 20 µg chlorophyll a 1-1. Maximum phytoplankton biomassin 1999 occurred between the end of summer and the beginning of autumn (September-October). Cyanobacteria, that weregenerally prevalent in phytoplankton community, clearly dominated during the peak of phytoplankton biomass. Microcystiswesenbergii was dominant amongst the cyanobacteria and represented almost 100 % of the biomass at the time of maximumphytoplankton value. The importance of environmental variables triggering cyanobacterial bloom events is discussed. Ourresults indicate that neither temperature nor N/P ratio are related to the bloom development. However, high nutrient concentration(ammonium in particular) and stability of the watercolumn seems to coincide with the maximum abundance of Microcystis wesenbergii.