HETEROTROPHIC BACTERIA INHIBITING WATER OF THE RIVER BRDA ON THE BYDGOSZCZ TOWN SECTION

Main Article Content

Marta Małecka Wojciech Donderski

Abstract

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.


Key words: heterotrophic bacteria, planktonic bacteria, mesophilic bacteria, psychrophilic bacteria, physiological properties

Article Details

How to Cite
MAŁECKA, Marta; DONDERSKI, Wojciech. HETEROTROPHIC BACTERIA INHIBITING WATER OF THE RIVER BRDA ON THE BYDGOSZCZ TOWN SECTION. Baltic Coastal Zone, [S.l.], v. 10, p. 2006, vol.10, pp. 31- 46, oct. 2010. ISSN 1643-0115. Available at: <https://bcz.apsl.edu.pl/index.php/1/article/view/186>. Date accessed: 06 july 2022.
Section
Articles