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1

The distribution of psychrophilic and mesophilic bacteria in lobelia lakes Nawionek and Piecki located in the Zaborski Landscape Park

100%
Okoniewska A., Donderski W., Malecka-Adamowicz M., Kubera L.
Polish Journal of Natural Sciences
|
2011
|
tom 26
|
nr 3
The research was carried out in Lake Piecki and Lake Nawionek, two lobelia lakes located within the Zaborski Landscape Park. Water samples were collected from the surface and bottom water layers in spring, summer and autumn 2009. The analysis reveals that the total number of planktonic bacteria (TNB) in Lake Nawionek ranged between 8.83 and 36.22·10⁵ cells/cm³ and between 15.77 and 44.93·10⁵ cells/cm³ in Lake Piecki. The highest counts of bacteria were noted in spring. In a majority of tests heterotrophic psychrophilic bacteria (CFU 22℃) were more abundant in the surface water layer while heterotrophic mesophilic bacteria were always more abundant in the bottom water layer. Rods were prevailing morphological forms in both lakes, followed by pleomorphic forms, whereas cocci and bacilli constituted the least abundant microbial groups. Furthermore, ammonifying and nitrifying bacteria were the most common physiological forms in both lakes. Higher physiological activities of bacterial strains were observed in Lake Piecki with the exception of pectinolytic and ureolytic bacteria, which were more active in Lake Nawionek.
2

Microbiological assessment of water samples from urban water reservoir

80%
Sliwa-Dominiak J., Deptula W.
Advances in Agricultural Sciences
|
2010
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tom 13
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nr 1
3
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Heterotrophic bacteria inhibiting water of the River Brda on the Bydgoszcz town section

80%
Malecka M., Donderski W.
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
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2006
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tom 10
Research was carried out on the occurrence and physiological properties of heterotrophic bacteria inhabiting water of the River Brda in the Bydgoszcz town section. The highest number of microorganisms was found in water of the studied river in June and August at sites located in the centre of the town, and the lowest in November and March at the site located at the inflow of the river into the town. There were three times more psychrophilic organisms (CFU 20°C) than mesophilic (CFU 37°C) among bacteria. Gram-negative rods constituted about 97% of all the bacteria, of which fast-developing strains constituted from 51 to 61%. The most commonly occurring bacteria in the water of the River Brda were ammonifying bacteria (83.4%), those that reduce nitrates to nitrites (55.5%), those that produce hydrogen sulphide from organic compounds (54.1%), those that hydrolyse protein (45.1%) and fat (44.3%).The least numerous were pectinolytic (0.8%), urealytic (5.8%) and cellulolytic strains (13.6%). The majority of bacteria were capable of carrying out from two to six different physiological processes (83.5% altogether), about 12% of strains carried out only one process, and only 0.1-4.0% of bacteria carried out more than six processes.
4

Analysis of cultivable aerobic bacteria isolated from bottom sediments in the Wijdefjorden region, Spitsbergen

80%
Konieczna I., Wojtasik B., Kwinkowski M., Burska D., Nowinski K., Zarnowiec P., Kaca W.
Polish Polar Research
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2011
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tom 32
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nr 2
5

Relationship between microbial load and histamine content in the rainbow trout fillet during refrigeration

80%
Kamani M. H., Safari O., Mortazavi S. A., Sabahi S., Atash M. M. S.
Electronic Journal of Polish Agricultural Universities. Series Fisheries
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2014
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tom 17
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nr 4
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