Vol. 32 – 2006 - Ecologia Mediterranea

MOHAMED TARHOUNI, AZAIEZ OULED BELGACEM, BELGACEM HENCHI, MOHAMED NEFFATI
44
Figure 4 – Percent cover of plants depending on the season drought and the distance from watering points
combined at well 2. See Table 1 for ANOVA results. Values are means ± IC. a/b/c indicate
differences for Hemicryptophyte plants and 1/2 for CRS plants.
Figure 5 – Percent cover of plants depending on the season drought and
the distance from watering points combined at well 3. See Table 1 for ANOVA results.
Values are means ± IC. a/b indicate differences for Therophyte plants.
Plant cover (%)
35
30
25
20
15
10
5
0
Th Th Th Th Th Th Th Th
250 m 500 m 1 km 2 km 250 m 500 m 1 km 2 km
Fall String
spring far from well 2 while it was the lowest
close to well 2 in both the rainy and the dry
season (Table 1; Figure 4). RS covers are not
significantly influenced by distance from
watering points. S cover increases significantly
with increasing distance from watering
point at well 1, while it increases and then
becomes relatively stable at well 2.
a
Discussion
ab
The main results of this study show that
Therophyte, arido-passive, RS and CRS
plants are particularly adapted to drought as
they increase greatly in the rainy season
(spending the dry season as seeds, etc.).
Chamaephyte, arido-active, S and CS plants
are particularly sensitive to disturbance and
thus not adapted to high trampling and grazing.
Hemicryptophyte and CRS plants are
also sensitive to disturbance but to a lesser
extent than previous species.
b
ecologia mediterranea – Vol. 32 – 2006
b