Research Article
Determinant Factor of Plant Species Diversity in the Organic Agriculture-Dominated System of Gedeo Zone, Southern Ethiopia
Table 6
Frequency, abundance, and dominance and importance value index of major woody species in agroecological zone of the study area.
| Scientific name | Lowland agroecological zone | RA | RF | RD | IVI |
| Coffea arabica L. | 39.106 | 13.757 | 0.022 | 52.885 | Mangifera indica L. | 8.101 | 7.937 | 17.750 | 33.788 | Persea americana Mill. | 4.190 | 6.878 | 15.258 | 26.326 | Millettia ferruginea (Hochst.) Bak. | 4.469 | 4.762 | 5.472 | 14.704 | Eucalyptus camaldulensis Dehnh. | 4.190 | 3.175 | 6.999 | 14.363 | Albizia gummifera (J. F. Gmel.) C. A | 1.676 | 3.175 | 6.538 | 11.389 | Acacia senegal (L.) Wild. | 0.279 | 0.529 | 10.397 | 11.206 | Grevillea robusta R. Br. | 2.793 | 2.116 | 4.703 | 9.613 | Cordia africana Lam. | 1.117 | 2.116 | 4.679 | 7.913 | Acacia abyssinica Hochst. ex Benth | 1.117 | 2.116 | 3.234 | 6.467 | Midland agroecological zone | Coffea arabica L. | 56.053 | 19.162 | 0.050 | 75.264 | Millettia ferruginea (Hochst.) Bak. | 6.053 | 7.784 | 11.571 | 25.408 | Cordia africana Lam. | 2.105 | 4.192 | 13.765 | 20.062 | Persea americana Mill. | 1.316 | 2.994 | 8.977 | 13.287 | Ficus sur Forssk. | 1.053 | 2.395 | 8.415 | 11.863 | Mangifera indica L. | 1.842 | 2.395 | 6.302 | 10.540 | Ficus elastica Roxb. ex Hornem. | 0.000 | 0.000 | 0.000 | 10.287 | Trichilia emetica Vahl | 1.053 | 2.395 | 5.726 | 9.174 | Croton macrostachyus Del. | 0.789 | 1.796 | 4.262 | 6.847 | Cupressus lusitanica Mill. | 2.368 | 2.395 | 1.560 | 6.323 | Highland agroecological zone | Eucalyptus globulus Labill. | 23.364 | 13.592 | 34.096 | 71.052 | Malus sylvestris Mill. | 5.607 | 4.854 | 45.350 | 55.812 | Erythrina brucei Schweinf. | 4.206 | 8.738 | 1.647 | 14.590 | Vernonia myriantha Hook. f. | 5.607 | 7.767 | 0.009 | 13.383 | Coffea arabica L. | 8.411 | 4.854 | 0.004 | 13.270 | Hagenia abyssinica (Bruce) J. F. Gmel. | 1.869 | 3.883 | 2.476 | 8.229 | Arundinaria alpina K. Schum. | 1.869 | 3.883 | 2.281 | 8.034 | Solanecio gigas (Vatke) C. Jeffrey | 2.336 | 4.854 | 0.577 | 7.768 | Justicia schimperiana (Hochst. ex Nees) | 3.738 | 3.883 | 0.035 | 7.657 | Vernonia amygdalina Del. | 2.804 | 3.883 | 0.007 | 6.694 |
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Source: own data analysis, 2019.
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