Table
7.1. Absolute
(nlm2) and relative (%
of numbers observed at 0
Arenicola marina densities) numbers of
various species at different densities of
A. marina. All data are averages of observations in two plots A and B in
1990
Absolute numbers
Relative numbers (%)
Density
nlm2 of
A. marina =}
0
15
29
37
44
15
29
37
44
Cerastoderma edule
502
361
199*
254*
232*
72
40
51
46
Macoma balthica
454
314
260*
254*
180*
69
57
56
40
Angulis tenuis
376
232*
137**
141**
128**
62
36
38
34
Mya arenaria
318
172*
188*
163*
137*
54
59
51
43
Ensis spec.
111
81
38*
76
46
73
34
68
41
Nereis diversicolor
1524
1349
1067
1252
966*
89
70
82
63
Nephtys hombergii
817
536*
306*
203**
320**
66
37
25
39
Capitella capitata
719
523
439*
405*
333**
73
61
56
46
Heteromastus filiformis
4497
2976*
2536*
2618*
1575**
66
56
58
35
Scoloplos armiger
432
323
220**
250*
250*
75
51
58
58
Pygospio elegans
9169
5630*
4251*
4993*
4494*
61
46
54
46
Tharyx marioni
1039
595*
523*
392**
268**
57
50
38
26
* Different from control
p<0.05; ** different from control
p (J
0
S
"c:I
g.
~.
t;::I
o·
....
s::
...
c:r'
~
0
...
'"
S·
S(1)
~
p..
p..
(1)
::s
C/O
(1)
' "
' "
::s
p..
>
...
Pi'
~
(1)
C/O
0
s::
::s
p..
......
\J1
\J1