Primary productivity of the phytoplankton in a tropical Brazilian shallow lake: experiments in the lake and in mesocosms

Abstract

Abstract: Aim: To evaluate the primary productivity of the phytoplankton in the Lake Monte Alegre, southeastern Brazil, and the factors that influence its fluctuations, experiments were carried out in the lake and in mesocosm; Methods: Primary productivity rates were measured using the 14 C technique, in experiments carried out monthly in the lake, during one year, and in two mesocosm experiments, one in the winter and another in the summer. Other factors also analyzed were temperature, dissolved oxygen, pH, …