| Autor: |
Priakhin EA, Triapitsina GA, Atamaniuk NI, Osipov DI, Stukalov PM, Ivanov IA, Popova IIa, Akleev AV |
| Jazyk: |
ruština |
| Zdroj: |
Radiatsionnaia biologiia, radioecologiia [Radiats Biol Radioecol] 2012 Jul-Aug; Vol. 52 (4), pp. 419-27. |
| Abstrakt: |
Planktonic communities of the Reservoir-9 (Lake Karachay, storage reservoir of liquid medium-level radioactive waste of the Mayak Production Association) are exposed to the severe radioactive forcing (in 2010 the total beta-activity of the water was 1.8 x 10(7) Bq/L, total alpha-activity was 1.1 x 10(4) Bq/L), aswell as to the chemical contamination (level of nitrates in water 4.1 g/L). The calculated values of the absorbed dose rate were 130 Gy/day for phytoplankton and 4.0 Gy/day for zooplankton. Extremely low species diversity, the overwhelming dominance of one species (phytoplankton is close to a monoculture of ubiquitous cyanobacteria Geitlerinema amphibium, zooplankton--to a monoculture of rotifers Hexarthrafennica), wide fluctuations in numbers of algae, a low number of zooplankton were the most substantial characteristics of the plankton communities in Lake Karachay. So, plankton communities status is a sign of environmental retrogress in this ecosystem. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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