A research is in progress since January 2001 in order to analyze the effect of grazing and manure spreading on microbial pollution of groundwater in carbonate aquifers. The research is carrying out through laboratory and field experiments in different test sites of Southern Italy. The results suggest that fecal enterococci are more reliable than fecal coliforms as indicator organisms of microbial contamination of groundwater. In carbonate Southern Apennines this difference in reliability is strongly conditioned by meteorological and pedological factors. The soil medium, which has a pyroclastic origin, causes a retention of fecal coliforms higher than that of fecal enterococci. This phenomenon is non-uniform at field scale and can reach a difference of an order of magnitude. It often produces the absence of fecal coliforms in spring water samples characterized by low concentrations of fecal enterococci. Both freezing and freeze-thaw intervals will cause a significant decrease in population (3 orders of magnitude, at least) of fecal coliforms while fecal enterococci are temporary inhibited. Each water year this phenomenon determine the absence of fecal coliforms in spring water samples contaminated by fecal enterococci during winter and spring, before the beginning of the new seasonal grazing

Reliability of fecal coliforms and fecal enterococci as indicator of microbial contamination of groundwater in carbonate aquifers / F., Celico; E., Petrella; Allocca, Vincenzo; N., Nerone; G., Marzullo; G., Naclerio. - STAMPA. - (2006), pp. 59-61. (Intervento presentato al convegno Proceedings of the 8th conference on limestone hydrogeology tenutosi a Neuchâtel, Switzerland nel 21 – 23 September 2006).

Reliability of fecal coliforms and fecal enterococci as indicator of microbial contamination of groundwater in carbonate aquifers

ALLOCCA, VINCENZO;
2006

Abstract

A research is in progress since January 2001 in order to analyze the effect of grazing and manure spreading on microbial pollution of groundwater in carbonate aquifers. The research is carrying out through laboratory and field experiments in different test sites of Southern Italy. The results suggest that fecal enterococci are more reliable than fecal coliforms as indicator organisms of microbial contamination of groundwater. In carbonate Southern Apennines this difference in reliability is strongly conditioned by meteorological and pedological factors. The soil medium, which has a pyroclastic origin, causes a retention of fecal coliforms higher than that of fecal enterococci. This phenomenon is non-uniform at field scale and can reach a difference of an order of magnitude. It often produces the absence of fecal coliforms in spring water samples characterized by low concentrations of fecal enterococci. Both freezing and freeze-thaw intervals will cause a significant decrease in population (3 orders of magnitude, at least) of fecal coliforms while fecal enterococci are temporary inhibited. Each water year this phenomenon determine the absence of fecal coliforms in spring water samples contaminated by fecal enterococci during winter and spring, before the beginning of the new seasonal grazing
2006
9782848671437
Reliability of fecal coliforms and fecal enterococci as indicator of microbial contamination of groundwater in carbonate aquifers / F., Celico; E., Petrella; Allocca, Vincenzo; N., Nerone; G., Marzullo; G., Naclerio. - STAMPA. - (2006), pp. 59-61. (Intervento presentato al convegno Proceedings of the 8th conference on limestone hydrogeology tenutosi a Neuchâtel, Switzerland nel 21 – 23 September 2006).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/425076
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