SciELO - Scientific Electronic Library Online

 
vol.80 número2Variabilidad topográfica y edáfica en bosques de Nothofagus betuloides (Mirb) Blume, en el suroeste de Tierra del Fuego, ChileAnálisis comparativo de índices bióticos utilizados en la evaluación de la calidad de las aguas en un río mediterráneo de Chile: río Chillán, VIII Región índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Revista chilena de historia natural

versión impresa ISSN 0716-078X

Resumen

DORADOR, CRISTINA; CASTILLO, GABRIELA; WITZEL, K. P.  y  VILA, IRMA. Bacterial diversity in the sediments of a temperate artificial lake, Rapel reservoir. Rev. chil. hist. nat. [online]. 2007, vol.80, n.2, pp. 213-224. ISSN 0716-078X.  http://dx.doi.org/10.4067/S0716-078X2007000200007.

Rapel reservoir is an eutrophic system in Chile that has undergone a series of anthropogenic impacts in recent decades. To provide a better understanding of the processes occurring in the reservoir, we examined bacterial composition from surface sediments using traditional microbiology techniques and molecular biology tools. Our results showed significant temporal variation in the physical and chemical composition of the water column, but no depth-related differences during the study period. To detect temporal changes in bacterial composition, cultivable heterotrophic bacteria, heterotrophic iron oxidizing bacteria, and sulfate-reducing bacteria were extracted from the surface sediments and their concentration measured. Microbial diversity in sediments was represented by closest relatives of eight different bacterial phyla. The most frequently recovered phylotypes in the clone library of 16S rDNA were related to sulfate-reducing bacteria belong to the Deltaproteobacteria group

Palabras clave : sediments; sulfate-reducing bacteria; 16S rDNA.

        · resumen en Español     · texto en Inglés     · pdf en Inglés