IADO   05364
INSTITUTO ARGENTINO DE OCEANOGRAFIA
Unidad Ejecutora - UE
artículos
Título:
Water quality in a lagoon in the southeast pampa region of Argentina
Autor/es:
FERNÁNDEZ, C; SALERNO, C. M.; PAOLONI, J. D.; LAURENT, G. C.
Revista:
REVISTA ARGENTINA DE MICROBIOLOGÃA
Editorial:
Asociación Argentina de Microbiología
Referencias:
Lugar: Buenos Aires ; Año: 2007 vol. 39 p. 51 - 56
ISSN:
0325-7541
Resumen:
This work
evaluates the chemical and bacteriological qualities of the recreational waters
of the Sauce Grande lagoon (Argentina).
Samples were taken between March 2002 and December 2003. Ninety-six samples
from three sampling stations were analyzed in order to determine the density of
aerobic heterotrophic microorganisms, the presence of sulphite-reducing
clostridia, and the most probable number of total coliforms, E. coli,
fecal enterococci and P. aeruginosa. The water pH, temperature and
chemical composition (N-NO3-, PO43-, Na+, Ca++ +Mg++, EC and SAR) were also
determined. Statistical analysis shows an increase in the microbial parameters
of fecal pollution and in the population of heterotrophic microorganisms during
the warmest months, influenced by higher temperatures and the more intensive
recreational use. Bacterial count indicated that fecal pollution was
statistically lower at the recreational area monitoring station; however, P.
aeruginosa, an opportunistic pathogen, was present in higher than permitted
densities in all determinations. These results show that, from the
physico-chemical point of view, anthropogenic activities do not significantly
affect the quality of the resource.