228
80 -
70 -
60 -
i
B
E
f 5 0 -
.r
-
a !
2
2
30 -
20 -
10HILARY B. MOORE
0
0 0 0
o
w
0
0
0
0 0 0
8
0 8 0
8 0
0
0
0
0
0
&
8
0
0
T
0
0
0
1
22
23
24
25
26
27
Temoerature - "C
FIG. 9. Details of the tropical region of Fig. 8 showing both the increased percentage of
the intertidal zone and the greater variability at the highest temperatures.
which are more numerous in the tropics. Comparison of the two
possibilities must await examination of other aspects of stress where
competition appears not to be involved, but it might be noted that
actual competition for space appears to be generally less on tropical
intertidal shores than it is on temperate ones.
C. Critical levels
As a meeting place of air and water, the intertidal zone is a region
of particular stress where differences between temperate and tropical
80 -
70 -
60 -
i
B
E
f 5 0 -
.r
-
a !
2
2
30 -
20 -
10HILARY B. MOORE
0
0 0 0
o
w
0
0
0
0 0 0
8
0 8 0
8 0
0
0
0
0
0
&
8
0
0
T
0
0
0
1
22
23
24
25
26
27
Temoerature - "C
FIG. 9. Details of the tropical region of Fig. 8 showing both the increased percentage of
the intertidal zone and the greater variability at the highest temperatures.
which are more numerous in the tropics. Comparison of the two
possibilities must await examination of other aspects of stress where
competition appears not to be involved, but it might be noted that
actual competition for space appears to be generally less on tropical
intertidal shores than it is on temperate ones.
C. Critical levels
As a meeting place of air and water, the intertidal zone is a region
of particular stress where differences between temperate and tropical