72
4 StatistICal Models and TechnIqucs
The graphical representation of pairwise Chord-distances (Fig. 4.3.15) by MDS
shows that there are some experimental replicates that do not differ very much
from the control replicates. On the whole, however, there is a strict separation
between the replicates from the experimental (E) and from the control sites (C).
Table 4.3.1. Species and abundances (7. 6. 1994)
Species
Cerastoderma edule
Macoma balthica
Eleone /onga
NephlVs homiJergii
Sen/op/os armiger
Pygospio e/egans
Capitella capilala
Lanice conchilefiil
Crangon cmngon
Ostracoda
1.0 E
0.3
~ -0.4
N
~
o -1.1
-1.8
-2.5
abundance In
experimental
sites
2
7
5
14
104
6
2
3
28
C
c
E E
c
c
c
~
c
abundance in
control sites
0
0
I
0
8
2
0
0
17
c~a=i
(£
-2.5 -1.8 -1.1
-0.4
0.3
1.0
DIM(1 )
Fig. 4.3.15 Two-dimensional MDS configuration of samples taken on 7.6.1994 from the control
(C) and experimental (E) sites based on Chord-distance