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- Title
Abundance and Distribution of Bacterioplankton in the Middle and Lower Reaches of the Ob River in Areas Impacted by Cities.
- Authors
Skopina, M. J.; Kuznetsova, E. V.; Kosolapov, D. B.
- Abstract
Bacteria perform important and diverse functions in the ecosystems of large rivers. The abundance, biomass and spatial distribution of heterotrophic bacterioplankton and its size–morphological groups have been studied in the middle and lower reaches of the Ob River in areas impacted by cities. The river water is characterized by a high content of suspended particles (on average (2.22 ± 0.21) × 106 mL–1), to which a significant part of bacteria is attached: on average, 41.5% of their total number and 35.7% of their biomass. The concentration of suspended particles and water conductivity are found to be among the main factors influencing the abundance and structure of bacterioplankton. A significant increase in bacterial abundance, mainly due to small free-living bacteria, is recorded below the mouth of the largest tributary, the Irtysh River, and the city of Khanty-Mansiysk. On this section of the Ob River, the average values of bacterioplankton abundance and biomass are (6.87 ± 4.99) × 106 cells/mL and 142 ± 13 mg C/m3, respectively, which are 1.6–1.7 times higher than in the other transects. The spatial distribution of heterotrophic bacterioplankton in the Ob River is mainly determined by the dynamics of water masses and the influence of tributaries and cities.
- Subjects
CITIES &; towns; BACTERIOPLANKTON; WATER masses; BIOMASS
- Publication
Contemporary Problems of Ecology, 2023, Vol 16, Issue 6, p807
- ISSN
1995-4255
- Publication type
Article
- DOI
10.1134/S1995425523060203