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

Source: own data analysis, 2019.