Fitoplancton, nutrienti algali e stato trofico del lago Bunnari (Sardegna settentrionale)

Sechi, Nicola; Cossu, Andrea Vito Luigi

Fitoplancton, nutrienti algali e stato trofico del lago Bunnari (Sardegna settentrionale)

1985

Sechi, Nicola | Cossu, Andrea Vito Luigi

Seasonal changes of nutrient concentrations, density and composition of phytoplankton and chlorophyll a contents in Bunnari lake were investigated to assess limnological conditions and trophyc status. Only 19 phytoplanktonic species are identified and only 2 species, during the seasonal succession, show high density and biomass; however seasonal succession is altered by a Cupper treatment with purpose of algal control. The 100% dominance of some species allow a good evaluation of chlorophyll aphytoplankton volume ratios. Since many of speciesfound in the lake are typical of productive environments andthe values of phytoplankton density and biomass, chlorophylla and nutrient concentrations are very high, it has been argued a high eutrophic level of the lake.

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