Browsing by Subject "N-limitation"

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    Dynamics of an autumn phytoplankton bloom in a hypereutrophic urban lake in the semiarid Pampean region (Argentina)
    (Murcia: Servicio de Publicaciones de la Universidad de Murcia, 2020) Pilati, Alberto; Echaniz, Santiago Andrés; Vigantti, Alicia María; Bazán, Graciela Inés
    In this paper we report a rare autumm phytoplankton bloom in a shallow lake of the semiarid Pampean area of Argentina. Phytoplankton biomass peaked only once during the autumn, followed 2 months later by a chlorophyll peak. The biomass peak might have been the result of a weak grazing pressure on the phytoplankton community (dominated by the nongrazeable Planktothrix agardhii (Gomont) Anagnostidis & Komárek) coupled with a reduction in the N-limitation towards the autumm. The chlorophyll peak took place when phytoplankton cells increased their chlorophyll content probably due to a reduction of solar irradiance and low water transparency. This findings indicate that phytoplankton seasonality in this particular area may depend on multiple biotic and abiotic factors.