100
aya
and breadfruit) are not growing now on
TTT)
all of the northern islands, the ubiquitous
Messerschmidia and Scaevola were
a
sampled and analyzed extensively with the
o 2%,
8
c
10 -
wo
a
—
a
~
2
°
BQ
4
|
c
aA
A
.
4
Pe
2
a
aa
oO
o
a
Cc
°
“9
a
o
Yok
able.
137
The correspondence between
Cs activity in coconut meat and
Messerschmidia and/or Scaevola fromthe
a
:v
species" for estimating doses from the
edible plants should they become avail-
“a4
s
6
intent that they be used as "indicator
same location is shown in Fig. 168.
To increase accuracy,
a
o
4
a
dcse estimates
to the human population through the
terrestrial vegetation pathway should be
based on the geographical distribution of
o° 9
radionuclides,
0
O.opL
Lt
f
ft of ft
5 10 15 20 25 30 35 40 45
Island number
In order to do this, how-
_ever, a correlation between nuclide
content of vegetation and nuclide content
of soil must be established.
Fig. 167. Concentrations of 9 Ose
in coconut meat.
and 13%
37
cs
As an ex-
ample of the correlations that have been
developed, data for 137 as in
Messerschmidia and scaevola vs 13% Cs
in soil are shown in Fig. 169.
Similarly, data obtained from rats —
were found to correlate with the vegetation radionuclide levels,
100
:]
4 Messerschmidia
oScaevola
10h
,
.
—
correlations for
.
For example,
Cs in rat muscle vs
Fig. 170, and for °°sSr
in rat bone vs
mb
Messerschmidia /Scaevola are~ shown
in
Fig. 171.
a
4
Three classes of data obtained from
1.0
Y= 1,27 x0-612\ 7
the terrestrial biota survey, therefore,
oa
0.1
0.1
137
Messerschmidia/Scaevola are shown in
QO
Concentration in coconut — pCi/g, dry.
the only mammals now found on the Atoll —
|
1.0
1
10.
!
100
have been used to estimate potential
human doses through the terrestrial food
1000
pathway:
Concentration in indicator plant —
e
pCi/g, dry
Data obtained from the edible
organisms where they were available.
Fig. 168. fiatistical correlation between
37Cs in coconut meat and
137Cs in Messerchmidia and
@
Scaevola.
Data obtained from the correlation
between edible plants — indicator
If-32