Ecological Study of the Vegetation in the Loka Abaya National Park, Ethiopia

Table 5

Environmental variables explaining the variation in species composition.

Variables	df	Sums. of sqs	Mean. sqs	F. model	R ^2	Pr (>F)
Altitude	1	2.155	2.15472	6.4738	0.05483
Slope	1	0.949	0.94891	2.8510	0.02414
pH	1	0.729	0.72914	2.1907	0.01855
Na	1	0.517	0.51734	1.5543	0.01316
CEC	1	0.560	0.55956	1.6812	0.01424
SMC	1	0.604	0.60396	1.8146	0.01537
K	1	0.597	0.59746	1.7950	0.01520
Mg	1	0.504	0.50379	1.5136	0.01282
N	1	0.431	0.43077	1.2942	0.01096	0.22
P	1	0.332	0.33167	0.9965	0.00844	0.34
Ca	1	0.307	0.30714	0.9228	0.00782	0.65
Grazing	1	0.536	0.53551	1.6089	0.01363	0.06
Sand (%)	1	0.454	0.45415	1.3645	0.01156	0.15
Silt (%)	1	0.368	0.36814	1.1061	0.00937	0.42
Clay (%)	1	0.378	0.37834	1.1367	0.00963	0.39
Disturbance through human	1	0.604	0.60356	1.8134	0.01536	0.06.
SOM (%)	1	0.271	0.27074	0.8134	0.00689	0.72
EC	1	0.382	0.38154	1.1463	0.00971	0.29
Residuals	86	28.624	0.3328		0.72834
Total	104	39.301			1.00000

Significance codes: 0 ‘^∗∗∗’ 0.001 ‘^∗∗’ 0.01 ‘^∗’ 0.05 ‘.’ 0.1 ‘ ’ 1.