Impacts of Different Tree Species of Different Sizes on Spatial Distribution of Herbaceous Plants in the Nigerian Guinea Savannah Ecological Zone

Table 4

Species richness, diversity, and evenness from inside and outside crown zones of trees with different sizes and the open field, with their standard deviation (StDev) and Standard Error of the Mean (SE Mean). PB: P. biglobosa; VP: V. paradoxa.

	Small VP inside	Small VP outside	Big VP inside	Big VP outside	Small PB inside	Small PB outside	Big PB inside	Big PB outside	SE Mean	StDev
Species richness	26	24	25	22	23	28	21	27	0.866	2.449
Shannon Index	3.43	3.15	3.77	3.12	3.72	3.26	2.47	2.98	0.148	0.419
Evenness	0.73	0.69	0.81	0.70	0.82	0.68	0.56	0.63	0.0306	0.0865