172
A.R.D. Stebbing . R.I. Willows
a
b
c
d
Log C8180 (total sediment)
Log C8180 «63 ~m sediment)
Log C828 (total sediment)
Log CB28 «63 ~m sediment)
4
4
4
4
t
3 t tt
IIIHIlII
3
tt t t
3
3
I IlIl\d
2
t t
2
t t
t t t t
2
t
t
2
1
1
0
1
0
1
1 2 3 4 5 8 7 8 9
12345 6 769
1 2 345 8 7 8 9
1 2 3 4 5 6 7 8 9
e
f
9
h
logTHC-UV (total sediment)
LogTHC-UV «63 ~m sediment) Log 2&3 PAH (total sediment)
log 2&3 PAH «63 ~m sediment)
2.5
3.0
j j j I I I I I I
4
4
t
3 t t
11111111
1::;
tttttt
2.5
tttttt
t
2
3
0.5
2.0
t
t
1
-0.5
1.5
0
2
12345 6 7 8 9
1 2 3 4 5 6 788
1 2 3 4 5 8 7 8 9
123 456 7 8 9
i
j
k
I
log Cd (total sediment)
Log Cd «63 ~m sediment)
Log Pb (total sediment)
Log Pb «63 ~m sediment)
1
o tt tt
2
2.2
t t
t
Ott t
-0.5
t
t t t
ttttt
-1
+ +
t t t
1
t t t t
1.8
ttt
+
-1.0
t
-2
+ + +
-3
-1.5
0
lA
1 2 3 4 5 8 7 8 9
1 2 3 4 5 8 7 8 9
1 2 3 4 5 6 789
123 4 5 6 7 8 9
m
n
0
p
Log Hg (total sediment)
Log Hg «63 ~m sediment)
Log As (total sediment)
Log As «63 ~m sediment)
0 t
0
1.5
1.5
j j j I I I I I I
ttt
tt t t t
1.0 t t t
-1
-0.5
t
t
t 0.5
t tt t t
1.0
-2
t t H
-1.0
t t 0.0
-3
1.5
-0.5
t 0.5
1 2 3 4 5 6 789
1 2 3 4 5 6 7 6 9
1 2 3 4 5 6 769
1 2 3 4 5 6 7 6 9
Fig. 8.5. Selected chemical data from the ICES/IOC Bremerhaven Workshop indicating chemical contamination gradients on a transect running northeast across the German Bight from the mouths of
Elbe-Weser estuaries (From Stebbing et aI.1992). Units: a-d,g-h ngg-' drywt; f-g, i-p f1gg- 1 drywt.
95% confidence intervals are indicated
numerous biological effects techniques (Fig. 8.5) (including all those adopted by the
North Sea Task Force for use in preparing the 1993 QSR), were allied to chemical analyses of water, sediment and tissues (Fig. 8.6).
The biological data relates primarily to the dab (Limanda limanda). A wide range
of techniques (biochemical, subcellular, organismal responses) indicate that the fish
are progressively less stressed with distance offshore (Fig. 8.5). This pattern is repro-
A.R.D. Stebbing . R.I. Willows
a
b
c
d
Log C8180 (total sediment)
Log C8180 «63 ~m sediment)
Log C828 (total sediment)
Log CB28 «63 ~m sediment)
4
4
4
4
t
3 t tt
IIIHIlII
3
tt t t
3
3
I IlIl\d
2
t t
2
t t
t t t t
2
t
t
2
1
1
0
1
0
1
1 2 3 4 5 8 7 8 9
12345 6 769
1 2 345 8 7 8 9
1 2 3 4 5 6 7 8 9
e
f
9
h
logTHC-UV (total sediment)
LogTHC-UV «63 ~m sediment) Log 2&3 PAH (total sediment)
log 2&3 PAH «63 ~m sediment)
2.5
3.0
j j j I I I I I I
4
4
t
3 t t
11111111
1::;
tttttt
2.5
tttttt
t
2
3
0.5
2.0
t
t
1
-0.5
1.5
0
2
12345 6 7 8 9
1 2 3 4 5 6 788
1 2 3 4 5 8 7 8 9
123 456 7 8 9
i
j
k
I
log Cd (total sediment)
Log Cd «63 ~m sediment)
Log Pb (total sediment)
Log Pb «63 ~m sediment)
1
o tt tt
2
2.2
t t
t
Ott t
-0.5
t
t t t
ttttt
-1
+ +
t t t
1
t t t t
1.8
ttt
+
-1.0
t
-2
+ + +
-3
-1.5
0
lA
1 2 3 4 5 8 7 8 9
1 2 3 4 5 8 7 8 9
1 2 3 4 5 6 789
123 4 5 6 7 8 9
m
n
0
p
Log Hg (total sediment)
Log Hg «63 ~m sediment)
Log As (total sediment)
Log As «63 ~m sediment)
0 t
0
1.5
1.5
j j j I I I I I I
ttt
tt t t t
1.0 t t t
-1
-0.5
t
t
t 0.5
t tt t t
1.0
-2
t t H
-1.0
t t 0.0
-3
1.5
-0.5
t 0.5
1 2 3 4 5 6 789
1 2 3 4 5 6 7 6 9
1 2 3 4 5 6 769
1 2 3 4 5 6 7 6 9
Fig. 8.5. Selected chemical data from the ICES/IOC Bremerhaven Workshop indicating chemical contamination gradients on a transect running northeast across the German Bight from the mouths of
Elbe-Weser estuaries (From Stebbing et aI.1992). Units: a-d,g-h ngg-' drywt; f-g, i-p f1gg- 1 drywt.
95% confidence intervals are indicated
numerous biological effects techniques (Fig. 8.5) (including all those adopted by the
North Sea Task Force for use in preparing the 1993 QSR), were allied to chemical analyses of water, sediment and tissues (Fig. 8.6).
The biological data relates primarily to the dab (Limanda limanda). A wide range
of techniques (biochemical, subcellular, organismal responses) indicate that the fish
are progressively less stressed with distance offshore (Fig. 8.5). This pattern is repro-