Effects of ionizing radiation on bird physiology, …1) To assess short-term effects of Fukushima...
Transcript of Effects of ionizing radiation on bird physiology, …1) To assess short-term effects of Fukushima...
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Effects of ionizing radiation on bird physiology,
phenotype, and fitness in the
Fukushima contaminated area of Japan
Arizona State University
AAP Flash Japon Rikkyo University Tsukuba University IRSN
Japanese PI: Mamoru Watanabe (Tsukuba University, Japan)
Shin Matsui, Satoe Kasahara,
Gen Morimoto, Keisuke Ueda (Rikkyo University, Japan)
French PI: Christelle Adam-Guillermin (IRSN, France)
Audrey Sternalski, Jean-Marc Bonzom,
Jacqueline Garnier-Laplace (IRSN, France)
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FUKUSHIMA NUCLEAR ACCIDENT IN MARCH 2011
Brumfiel (2011) Nature 478: 435-436.
Mar 12 - 15 Mar 11 - 14 Mar 15 After Mar 15
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Tree Sparrows Nestlings of Great Tits Field work
© J-M BONZOM at IRSN
© J-M BONZOM at IRSN © J-M BONZOM at IRSN
© S Matsui © S Matsui
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RADIOACTIVE CONTAMINATION
OF NEST MATERIAL DUE TO
THE FUKUSHIMA NUCLEAR ACCIDENT
IN PASSERINE BIRDS
Matsui S1, Kasahara S1, Morimoto G1,
Mikami OK2, Watanabe M3, Ueda K1
1 Rikkyo Uni., 2 Iwate- Medical Uni. , 3 Tsukuba Uni.
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EXPOSURE TO RADIATION IN NEST
External dose of
eggs & nestlings in
contaminated nests.
Tree Sparrows
© S Matsui
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STUDY SITES
Tokyo
Ibaraki
Ibaraki (175 km SW)
Tokyo (222 km SW)
Fukushima
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PREDICTIONS
(1) Level of contamination in nest-boxes would
be greater in Ibaraki compared with Tokyo.
(2) Level of contamination in nest-boxes would
be greater in 2011 compared with 2012.
(3) Level of contamination in nest-boxes would
be positively related to nest weight.
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METHOD 1
• Total 44 nest-boxes at Ibaraki & Tokyo in 2011 & 2012
• Measurement of dose rate (μGy/h, Geiger Counter )
19 times at 10 sec intervals over a 3 min period
at 1cm above inner surface of nest cup.
• Collect & weigh the nest materials (g)
Checking precision
Measurement of Cs concentration (Bq/kg, Ge detector)
“μGy/h” & “Bq” in nest (Spearman r = 0.73, P < 0.001, n=19 )
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Do
se r
ate
(μ
Gy/h
)
Contamination Levels in Nest-boxes
2011 2012 2011 2012
Ibaraki Tokyo (n=10) (n=15) (n=7) (n=12)
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METHOD 2
• Cs concentration (Bq/kg) by Ge detector
Ibaraki (n = 10) & Tokyo (n = 9) in 2012.
• The amount of Cs in nest-boxes (Bq)
= Cs concentration (Bq/kg) * Nest weight (g)/1000
• Model selection
The amount of Cs in nest-boxes (Bq)
~ Nest weight (N) + Site (S) + N:S
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Contamination Levels in Nest-boxes Th
e a
mo
un
t o
f C
s
in n
est
-bo
xe
s (B
q)
Nest weight (g)
Nest contamination was positively related to nest weight.
Ibaraki Tokyo
●
○
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SUMMARY
• Bird species could be more highly
exposed to radiation in the breeding
season directly after the nuclear
accident than in the later seasons.
• The amount of radioactive
contamination would be positively
related to nest weight.
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FREEBIRD Project Fukushima Radiation Exposure &
Effects in BIRD populations
Rikkyo University University of Tsukuba
Audrey STERNALSKI (Post-doctoral fellow) Jean-Marc BONZOM, Christelle ADAM-GUILLERMIN Jacqueline GARNIER-LAPLACE
(IRSN/PRP-ENV/SERIS/LECO)
AAP Flash Japon Arizona State University
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1) To assess short-term effects of Fukushima ionizing radiation on wildlife (specifically birds) by acquiring a recent, adapted data-set, and to define key biological parameters that can inform, in real time, about organism response to their environment
2) To accurately measure external irradiation and individual internal contamination levels that can affect individual physiology and health, in order to obtain efficient dose-response curves at the individual level
3) To identify proximate physiological mechanisms (physiological and/or genetic) leading to a possible co-variation between individual phenotypic responses, external irradiation levels and internal contamination
Aims
Aims of the FREEBIRD project
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Why the FREEBIRD project?
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General methodology Methods & preliminary results
RADIATION EXPOSURE
PHYSIOLOGY
PHENOTYPIC EXPRESSION Assessment of key
biological parameters
biologica
l pa
ramete
rs
IONIZING RADIATION EFFECTS ON INDIVIDUAL
Individual dose-response curves
15
Study species Study sites
Characterisation of individual contamination
INTERNAL
CONTAMINATION
gradient of radiation level
Characterisation of external irradiation level of study sites
EXTERNAL
IRRADIATION
BREEDING PERFORMANCE
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Study species
easy to trap and handle
common and distributed along a contamination gradient
widely studied at Tchernobyl
Bird species…
16
and a frog species
→ never studied!!
Japanese tree frog (Hyla japonica)
Methods & preliminary results
Eurasian Tree sparrow (Passer montanus) Varied tit
(Parus varius)
Great tit (Parus major)
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Study sites Methods & preliminary results
External irradiation level gradient
3 study sites (3 – 7 µGy/h)
Tree sparrows
homogenous
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Study sites Methods & preliminary results
External irradiation level gradient
15 nest-boxes (3 – 21 µGy/h)
Tit species
homogenous
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Workshop CEH Lancaster February 4th, 2013 19
Study sites Methods & preliminary results
External irradiation level gradient
5 study sites (0.3 – 8 µGy/h)
Japanese tree frog
homogenous
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Internal individual contamination
Characterisation of individual contamination
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Methods & preliminary results
Individual whole body contamination differs between study sites and increase with external irradiation level
External irradiation level effect on individual
whole body contamination:
Site effect on individual whole body
contamination:
GENMOD: F6,118 = 178.19, p < 0.0001
0
5
10
15
20
25
T B A F E G CMe
an in
tern
al &
ext
ern
al d
ose
ra
tes
(wh
ole
bo
dy;
µG
v/h
)
Frog study sites
21 23 18 18
17
7
21
GLIMMIX (random Study site):
F1,5.56 = 40.63, p = 0.0009
0
10
20
30
40
0 5 10 15
External irradiation level (µGy/h)
Inte
rnal
do
se r
ate
(w
ho
le
bo
dy;
µG
v/h
)
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Physiological parametres
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Parametres Variables
Carotenoids Vit. A/E
Colouration
Plasmatic lysis capacity
Immune system
Blood smear test
Oxidative status
TBARS
Oxide nitric
Glutathione
Hormones Testosterone
Corticosterone
Key biological parameters Methods & preliminary results
External irradiation (µGy/h) effects on number of
micronuclei (per 1000 counted RBcells):
GENMOD (Distr. Poisson): F2,61 = 2.69, p = 0.0757
0
2
4
6
8
10
12
14
0 2 4 6 8
External irradiation µGy/h (Study sites)
(S05) (S03) (S06) M
icro
nu
cle
i ob
serv
ed
n
um
be
r p
er
10
00
RB
C
cou
nte
d
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Genetic parametres
22
Parametres Variables
Single strand DNA break DNA damage
Gene expression 4 focus genes
DNA methylation Epigenetic
Key biological parameters Methods & preliminary results
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Phenotypic expression
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Parametres Variables
Body condition Biometric measures
Carotenoids in feathers & tissues
Coloured traits Picture analyse
(carotenoids / melanin)
Key biological parameters Methods & preliminary results
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• Estimate external dose of
eggs and nestlings in high
contaminated nests
• Monitor physiological
factors
• Movement of radionuclides
through bioaccumulation
(e.g., Cs-134 and Cs-137)
FUTURE ISSUES
© S Matsui © S Matsui
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ACKNOWLEDGEMENTS
This research is supported by
• the J-RAPID Program of Japan Science
and Technology Agency (JST)
• the ANR project : ANR 2011-JAPN-003-01