Investigation of Woody Species Structure and Regeneration Status in the Central Rift Valley, Sidama Regional State, Ethiopia
Table 2
Structural analysis of trees and shrubs in the study area (99 plots of 20 m × 20 m (400 m2) = (3.96 ha).
Species
Ab
Density (ha)
Relative density (ha)
BA (m2)
FEQ
R.F
R.De
R.Do
IVI
Acacia albida
31
7.82
0.94
0.06
3.03
0.45
0.94
0.08
1.47
Acacia asak
6
1.51
0.18
0.00
1.01
0.15
0.18
0.00
0.33
Acacia brevispica
152
38.38
4.61
0.02
32.32
4.82
4.61
0.03
9.46
Acacia drepanolobium
38
9.59
1.15
0.12
3.03
0.46
1.15
0.16
1.77
Acacia lahai
21
5.30
0.63
0.82
4.04
0.61
0.63
1.12
2.36
Acacia polyacentha
1
0.25
0.03
0.00
1.01
0.15
0.03
0.00
0.18
Acacia seyal
33
8.33
1.00
2.83
9.09
1.34
1.00
3.87
6.21
Acacia sieberiana
13
3.28
0.39
0.00
1.01
0.15
0.39
0.00
0.54
Acacia tortilis
6
1.51
0.18
0.00
9.09
1.38
0.18
0.00
1.56
Acokanthera schimperi
58
14.64
1.76
0.61
22.22
3.37
1.86
0.83
6.06
Balanites aegyptiaca
53
13.38
1.60
3.08
27.27
4.14
1.60
4.21
9.95
Balanites rotundifolia
6
1.51
0.18
0.00
1.01
0.15
0.39
0.00
0.54
Boscia minimifolia
60
15.15
1.82
0.52
17.17
2.61
1.82
0.71
5.14
Boscia subtussulcata
42
10.61
1.27
0.00
12.12
1.84
1.27
0.00
3.11
Buddleja polystachya
16
4.04
0.48
0.02
5.05
0.76
0.48
0.03
1.27
Calpurnia aurea
28
7.07
0.84
0.00
12.12
1.84
0.84
0.00
2.68
Carissa spinarum
10
2.52
0.30
0.00
3.03
0.46
0.3
0.00
0.76
Cassipourea malosana
1
0.25
0.03
0.00
1.01
0.15
0.03
0.00
0.18
Celtis africana
4
1.01
0.12
0.00
2.02
0.29
0.12
0.00
0.41
Combretum rochetianum
57
14.39
1.72
1.72
11.11
1.61
1.72
2.35
5.68
Combretum collinum
89
22.47
2.69
0.79
15.15
2.3
2.69
1.08
6.07
Combretum molle
275
69.44
8.33
12.31
38.38
5.82
8.33
16.82
30.97
Cordia africana
3
0.75
0.09
0.00
2.02
0.29
0.09
0.00
0.38
Cordia sinensis
1
0.25
0.03
0.00
1.01
0.15
0.03
0.00
0.18
Dichrostachys cinerea
193
48.23
5.78
1.23
36.36
5.29
5.78
1.68
12.75
Diospyros abyssinica
1
0.25
0.03
0.00
1.01
0.14
0.03
0.00
0.17
Diospyros mespiliformis
3
0.25
0.03
0.00
4.04
0.61
0.03
0.00
0.64
Dodonaea angustifolia
429
108.33
13.03
0.00
38.38
5.83
13.07
0.00
18.9
Dovyalis abyssinica
6
1.51
0.18
0.00
1.01
0.15
0.18
0.00
0.33
Ehretia cymosa
8
1.26
0.15
0.00
2.02
0.31
0.15
0.00
0.46
Euclea schimperi
243
61.36
7.36
6.29
33.33
5.06
7.38
8.62
21.06
Euphorbia tirucalli
138
34.84
4.18
5.93
9.09
1.38
4.18
8.27
13.83
Faurea rochetiana
1
0.25
0.03
0.00
1.01
0.15
0.03
0.00
0.18
Ficus sur
43
10.83
1.3
0.03
3.03
0.46
1.37
0.05
1.88
Ficus vasta
29
7.37
0.88
0.56
4.04
0.30
0.98
0.77
2.05
Flacourtia indica
1
0.25
0.03
0.00
5.05
0.76
0.03
0.00
0.79
Grewia bicolor
104
26.26
3.15
0.18
24.24
3.68
3.15
0.28
7.11
Grewia ferruginea
18
4.54
0.54
0.00
9.09
1.38
0.54
0.00
1.92
Grewia tenax
29
7.32
0.87
0.00
7.07
1.07
0.87
0.00
1.94
Grewia villosa
12
3.03
0.36
0.00
3.03
0.46
0.36
0.00
0.82
Ilex mitis
148
37.37
4.48
23.93
37.37
5.68
4.48
32.08
42.24
Kleinia squerosa
7
1.76
0.21
0.00
1.01
0.15
0.21
0.00
0.36
Lannea schimperi
47
11.86
1.43
0.09
11.11
1.68
1.43
0.12
3.23
Lannea triphylla
19
4.79
0.56
0.58
5.05
0.76
0.56
0.79
2.11
Maytenus arbutifolia
14
3.53
0.42
0.00
3.03
0.46
0.42
0.00
0.88
Mimusops kummel
1
0.25
0.03
0.00
1.01
0.15
0.03
0.00
0.18
Olea europaea L. subsp. cuspidata
216
54.54
6.56
9.00
35.35
5.37
6.56
12.36
24.29
Ozoroa insignis
55
13.89
1.66
1.13
19.19
2.92
1.66
1.55
6.13
Piliostigma thonningii
32
8.08
0.01
0.22
2.02
0.09
0.44
0.30
0.93
Pittosporum viridiflorum
6
1.51
0.18
0.00
2.02
0.31
0.18
0.00
0.49
Rhus natalensis
217
54.79
6.58
0.00
57.57
8.76
6.98
0.00
15.74
Rhus vulgaris
43
10.85
1.30
0.23
5.05
0.41
1.33
0.31
2.05
Salvadora persica
24
6.06
0.72
0.00
2.02
0.30
0.92
0.00
1.22
Schrebera alata
23
5.80
0.69
0.27
6.06
0.92
0.99
0.37
2.28
Sclerocarya birrea
5
1.26
0.15
0.03
5.05
0.76
0.15
0.37
1.28
Teclea nobilis
68
17.17
2.06
0.53
22.22
3.07
2.06
0.72
5.85
Vangueria apiculata
1
0.25
0.03
0.00
1.01
0.15
0.03
0.00
0.18
Ximenia americana
103
26.01
3.12
0.05
37.37
5.64
3.12
0.07
8.83
Zanthoxylum chalybeum
1
0.25
0.03
0.00
1.01
0.15
0.03
0.00
0.18
Total
3292
831.31
73.18
100
100
100
300
Ab, abundances; FEQ, frequency, RF, relative frequency; R.De, relative density; R.Do, relative dominancy; IVI, important value index. “0” value indicates several decimal places, i.e., close to 0.
