introduction laboratory transgenerational study€¦ · 3 introduction the effects of chronic, low...
TRANSCRIPT
3
Introduction
The effects of chronic, low dose radiation
on aquatic biota are unclear. We test the
effects of the chronic radiation levels
within the Chernobyl Exclusion Zone
(CEZ) on Daphnia pulex, a freshwater
crustacean. We combine laboratory
experiments to establish the effects of
radiation and fieldwork to test how these
effects translate to the CEZ.
6 generation experiment in control
(0.00045mGy/h), high (0.35
mGy/h) and recovery
(0.00045mGy/h) treatments.
Daphnia were collected around the CEZ
from lakes with a range of historic
contamination levels. Fitness measured
under background radiation levels.
• No differences in life history parameters across
populations
• Populations vary from each other but not according
to dose.
Field
Life history experiment
Acknowledgements
Katherine Raines, Dr Craig Anderson, Eugene Gulyaichenko, Elya Todd
.
Effects of chronic radiation on natural Daphnia populations in ChernobylJessica Goodman Prof. David Copplestone1, Dr. Stuart Auld1, Dr. David Spurgeon2, Gennady Laptev3, Sergey Gaschak4.1University of Stirling, Stirling, Scotland, FK9 4LA UK. 2NERC Centre for Ecology & Hydrology, Benson Lane, Crowmarsh Gifford, Oxfordshire OX10 8BB. 3 UHMI, Ukrainian HydroMeteorological Institute 37, Prospekt
Nauki 03028 Kiev, Ukraine. 4 Chornobyl center 11, 77th Gvardiiska Dyviziya St., Slavutych, Kyiv Region, 07100, Ukraine
@Jess_Goodman13
Laboratory
Transgenerational study
3
Key conclusions
• Fitness decline in exposed individuals but
not in historically contaminated samples
• Radiation has negative impacts on
individuals but not on populations
• Other environmental factors in the CEZ
have a greater selective impact on Daphnia
populations than radiation itself.
Num
ber
of offspri
ng
Day
Experimental Day
Day
• Decline in reproductive
output in generations F1,
F2 & F6.
• Increase in reproductive
output in generation F4
• No difference between the
exposed and recovery
treatment groups.O
ffspri
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tive t
o c
ontr
ols
Offspri
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ontr
ols