To What Extent Do Protected Areas Determine the Conservation of Native Flora? A Case Study in the Sudanian Zone of Burkina Faso
Table 4
Results of log-linear analysis (in SAS Inc., 1999 [22]) applied to diameter class frequency.
Sectors
Vegetation communities
The CATMOD procedure
Maximum likelihood analysis of variance
Protected areas
Unprotected areas
Source
DF
Chi square
Pr > ChiSq
DF
Chi square
Pr > ChiSq
NS
Class
9
124.23
<0.0001
9
157.98
<0.0001
Gallery forests
Distr.
1
0.01
0.9364
1
0.02
0.8749
Class * Distr.
9
3.97
0.9134*
9
1.12
0.9991*
Class
4
147.24
<0.0001
4
174.12
<0.0001
Shrub savannas
Distr.
1
0.00
0.9634
1
0.06
0.8053
Class * Distr.
4
0.41
0.9815*
4
0.55
0.9682*
Class
9
141.34
<0.0001
7
132.19
<0.0001
Tree savannas
Distr.
1
0.01
0.9400
1
0.00
1.0000
Class * Distr.
7
0.47
0.9996*
5
1.15
0.9500*
Class
9
136.22
<0.0001
9
117.33
<0.0001
Woodland savannas
Distr.
1
0.32
0.5714
1
0.00
1.0000
Class * Distr.
8
0.82
0.9992*
7
1.30
0.9885*
SS
Class
9
70.19
<0.0001
9
97.12
<0.0001
Gallery forests
Distr.
1
0.00
0.9509
1
0.13
0.7179
Class * Distr.
9
6.61
0.6774*
9
3.30
0.9514*
Class
4
171.71
<0.0001
4
155.18
<0.0001
Shrub savannas
Distr.
1
0.17
0.6828
1
0.00
0.9866
Class * Distr.
4
0.62
0.9607*
4
0.03
0.9999*
Class
8
224.44
<0.0001
7
121.65
<0.0001
Tree savannas
Distr.
1
0.02
0.8998
1
0.15
0.7012
Class * Distr.
7
1.50
0.9825*
6
1.82
0.9357*
Class
9
142.41
<0.0001
9
120.31
<0.0001
Woodland savannas
Distr.
1
0.00
1.0000
1
0.32
0.5714
Class * Distr.
8
0.58
0.9998*
8
1.02
0.9981*
Class
9
150.30
<0.0001
9
131.22
<0.0001
Woodlands
Distr.
1
0.17
0.6758
1
0.04
0.8378
Class * Distr.
9
0.94
0.9996*
9
2.07
0.9903*
An interaction “Class * Distr.” significant () shows that the conformation between observed structure and Weibull Distribution is accepted.
*See values.
