The contamination of vast areas with radionuclides after the Chernobyl disaster has particularly acutely posed the problem of predicting the consequences of its chronic effects on ecosystems. Mouse rodents, due to their wide range of distribution, attachment to habitats, close contact with the upper layers of the soil (the most intensively accumulating pollutants, as well as rapid reproduction rates, are widely used as objects for bioindication of ecotoxicity

1. The mouse rodent model (root vole, Microtus
oeconomus Pall.) in the ecotoxity
bioindication
Triest - 2019
Maria Drahulian
E-mail: parus_major@ukr.net

2. The forest under the
influence of radiation
has become red

3. Habitat Microtus oeconomus
(https://en.wikipedia.org/wiki/Tundra_vole)

4. х1000х1000
х1000
Cytogenetic analysis of bone marrow Microtus
oeconomus
Сells with
micronuclei (MN)
Two nuclei cells
(TN)
Marker of
apoptosis (AP)

5. Kopachi village
Lely village
Village Chistogolovka

6. The range of equivalent dose rate of γ-irradiation at
research sites in the year of catching Microtus
oeconomus, mkSv • h-1
Village 1986 1989 1996-2009
Stechanka 0,5-3,0 0,4-0,5 0,2-0,4
Lely 2,8-4,7 6-15 2-3
Izumrudnoe 40-60 6-15 2-3
Yanov 400-500 23-46 10-12
Chistogalovka 400-500 20-40 10-12
Deep lake 1000-3000 500-1000 25-30
Red Forest 5000-7000 1000-1200 30-35

7. 0
1
2
3
4
5
6
7
Chistogolovka Lely Kopachi
0.8 0.9
1.32
6.2
5.3 4.22
Analysis of cytogenetic parameters Microtus
oeconomus village Chistogolivka, village Leliv, village
Kopachi
Сells with
micronuclei, ‰
Two nuclei
cells,‰
Cesium-137 release dose
in the Chernobyl accident
Hiroshima Chornobyl

9. CentricfissioninMicrotusoeconomus.Achromosomestudyof
iso-latedpopulationsinFennoscandia.KarlFredga,AlfPerssoni
andNilsChr.Stenseth(Hereditas.–1980.–Vol.92:P.209-216)

10. Kostenko S.O.., 2009
Consequences of
Chernobyl on the
world map
Karyotype with centric fusion chromosome 14 in a
root vole (2n= 30)

12. 1. The most variable characteristics are
mononuclear leukocytes with micronuclei
and also the proportion of metaphases with
chromosomal aberrations.
2. Ionizing radiation does not induce
anomalies, but only enhances the
manifestation of the initially unstable
cytogenetic characteristics for the studied
species of mice.