Inter-relationships between Bacteriological and Chemical Variations in Lake Pamvotis - Greece

Abstract

The relationships between indicator bacteria and the organic load were conducted over a year in Lake Pamvotis, in northwest Greece. Total coliforms (TC) and fecal coliforms (FC) were found in water samples from ve different sampling stations. Organic load was estimated using biological oxygen demand (BOD) and chemical oxygen demand (COD) parameters. Increased TC and FC levels were found close to heavily polluted areas. Near-bottom samples had higher levels of bacteria and the numbers of TC and FC were increased during rainfall periods. Low or negative correlations were also observed between the bacteriological indices and BOD and COD levels, thus strengthening the hypothesis that indicator bacteria mainly depend upon the origin of pollution rather than the amount of the organic load. It is conceivable that systematic bacteriological and chemical indices must be monitored in order to evaluate the ecosystem and to protect public health.

Comparative assessment of the relationship between coliform bacteria and water geochemistry in surface and ground water systems

“…Pearson et al [ 16 ] reported that, faecal coliforms died more rapidly when pH conditions were increased above 8.50, even in a nutrient rich condition, suggesting the influence of pH for the survival of faecal coliform in water systems. The concentration and distribution of faecal coliform also depends on tropical conditions [ 17 ] and indirectly on the physicochemical conditions of the water [ 18 ].…”

“…These interactions are controlled by varying factors in different aquatic environments. In surface water, faecal coliform survival and concentration is much affected by physical and climatic factors such as water temperature, rainfall, runoff, tidal conditions, solar radiation, dissolved nutrients, competition with other bacteria as well as other physicochemical conditions [ 17 – 19 , 28 , 29 ]. Geochemical processes like weathering, dissolution, hydrolysis, precipitation, adsorption, and ion exchange as well as oxidation reduction and biochemical reactions are major controlling factors for the chemistry of groundwater [ 30 ].…”

“…The mediation of phosphates when heavy metals were accounted for, suggest that heavy metals might control phosphates’ relationship with total coliform in surface water and thus the sources of phosphates in surface water could be linked to bedrock phosphate mineralization, metallurgical wastewater, as well as, weathering processes. Coliform bacteria levels in water bodies are known to be affected by salinity and temperature and closely related with biological conditions and physicochemical properties of the water including pH, temperature, suspended solids, organic and inorganic nutrients in water [ 17 , 32 ].…”

Comparison of fecal coliform bacteria before and after wastewater treatment plant in the Izmir Bay (Eastern Aegean Sea)

“…Their disappearance rates from surface waters depend on a number of factors such as the availability of nutrients, temperature, salinity, turbidity, degree of water mixing, solar radiation, predation, and competition (Hood and Ness 1982;Flint 1987;Auer and Niehaus 1993). However, temperature and solar radiation are considered to be the most important abiotic factors (Esham and Sizemore 1998;Kagalou et al 2002;Xu et al 2002;Chigbu et al 2005).…”

Βιονομική μελέτη της γαρίδας Atyaephyra desmarestii (Millet, 1831) s.l. (Decapoda, Crustacea) με έμφαση στη δυναμική πληθυσμών του είδους

“…NAUMANN 1924, THIENEMANN 1925, PESTA 1929, RAWSON 1956, BRUNDIN 1958, στα μεσότροφα (NAUMANN 1921), στα εύτροφα και στα υπερεύτροφα οικοσυστήμα (π.χ. WEBER 1907, WEST AND WEST 1909, TEILING 1916, THIENEMANN 1925, MORTIMER 1941, 1942, MOUSTAKA-GOUNI AND TSEKOS 1989, MOUSTAKA-GOUNI 1993, KAGALOU ET AL. 2002.…”