Nitrogen Cycle Bacteria in the Waters of the River Drwęca
I. Gołaś1, I. Zmysłowska1, M. Harnisz1, K. Korzekwa1, A. Skowrońska1, M. Teodorowicz2, D. Górniak3, M. Gros1, S. Brzozowa1
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1Chair of Environmental Microbiology,
2Chair of Environment Protection Engineering, Department of Water Protection and Restoration,
3Chair of Microbiology, University of Warmia and Mazury in Olsztyn, ul. Prawocheńskiego 1, 10-950 Olsztyn, Poland
Pol. J. Environ. Stud. 2008;17(2):215–225
In 2004-05 counts of the bacteria proteolytic, ammonifying, AOB and NOB, NO3-N to NO2-N reducing, denitrifying, and atmospheric nitrogen fixing (Azotobacter sp. and Clostridium pasteurianum) were analyzed along with temperature, pH, dissolved oxygen saturation, ammonia, nitrite and nitrate nitrogen in waters of the River Drwęca. The counts of the above groups of bacteria ranged within a few orders of magnitude depending on the physiological group and sampling site. The smallest were the counts of autotrophic nitrifying and atmospheric nitrogen fixing bacteria Azotobacter sp. (102 cfu·1 cm-3) and Clostridium pasteurianum (102 MPN·100 cm-3). The most numerous were ammonifying bacteria (103 – 106 MPN·100 cm-3). The quantitative occurrence of the bacteria in question varied in relation to the physical and chemical parameters of the water, which was evidenced by Spearman’s statistical analysis.