Occurrence of Ceratium furcoides (Levander) Langhans 1925 bloom at the Billings Reservoir, São Paulo State, Brazil

Brazilian Journal of Biology

T Matsumura-tundisi¹  Jg Tundisi¹  Ap Luzia¹  Rm Degani¹ 

[1] ,Instituto Internacional de EcologiaSão Carlos SP ,Brazil

关键词: Ceratium furcoides;    blooms;    turbulence;    cysts;    cold fronts;    Ceratium furcoides;    floração;    turbulência;    cistos;    mistura vertical;   

DOI  :  10.1590/S1519-69842010000400013

来源: SciELO

【 摘 要 】

An unusual bloom of Ceratium furcoides is reported for a station of the Taquacetuba compartment of the Billings Reservoir. The appearance of this bloom is attributed to the mixing and turbulence of the water column that removed Ceratium cysts from the surface of the sediment and promoted conditions for the growth of this species in the region of mixing. Cold fronts approaching the Billings Reservoir are probably the cause of the mixing and bloom. Also turbulence induced by wind increased phosphorus concentration in the water column. Ceratium furcoides was the dominant species at station 1 where the nutrient concentrations of nitrogen and phosphorus were high. Ceratium spp. blooms may be a problem for water treatment and massive mortality can affect the dissolved oxygen of the water producing fish kill.

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