Abundancia y biomasa de la comunidad de rotíferos y su relación con parámetros ambientales en tres estaciones del Canal Cuemanco, Xochimilco

Abstract

Abstract. The aim of this study was to evaluate the biomass of the rotifer community in three sampling stations of the Cuemanco channel, Xochimilco. The rotifer samples were used to determine biovolume, total organic carbon and total ash. A total of 35 species belonging to 17 genera and 10 families were found, which represents 27.7% of the species reported for Xochimilco. The most abundant species were: Keratella tropica, Brachionus budapestinensis, K. americana, B. havanaensis and B. angularis. The genus with the highest biovolume (μm3) and dry weight (mg) was Brachionus. In descending order, the five species with the highest biovolume and dry weight were: B. urceolaris, B. calyciflorus, B. quadridentatus, B. caudatus and B. budapestinensis. Brachionus was the genus with the largest biomass contribution in all sampling points (37.90 mgC·m 3 ), representing 92.51% of the total biomass of the rotifer community. B. budapestinensis supplied the greatest amount of biomass in all the samples (13.87 mgC·m3), with 34% of the total.