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ABSTRACT
Fruit trees constitute important biological resources in many agro ecological systems and forest ecosystems all over the world. The tropics, more than any other region of the world, is endowed with great diversity of fruit tree species that have provided humans with basic food and nourishment for ages since the domestication of beneficial wild plants (crops species). To determine the extent of fruit tree species diversity in crop based Agroforestry systems in fringe communities around Okomu National Park, A reconnaissance survey to the Okomu National Park, the farming areas of the adjoining communities was carried out to locate the boundaries of the selected sites and get acquainted with the general conditions of the place and determine the predominant farming systems in the study area. Sample plots were laid for assessment of the diversity of fruit tree species within the national park and to cover the farming areas surrounding the park as farmers in the selected boundary communities practice farming in these areas. Also, coordinates of the sample locations were collected accordingly using a GPS.
The information obtained from the study clearly indicates diversity and abundance of fruit trees species in the National park and farming communities around the park. Higher species diversity indices; Shannon- Wiener diversity index (2.508), Species Evenness index (0.7222), Simpson’s diversity index (0.9008), Margalef’s species richness (3.513) and Dominance of (0.9917) obtained for the national park is an indication that the land use sustained a relatively a stable environmental condition compared to the low diversity of fruit tree Shannon- Wiener diversity indices(1.382 and 1.443), Species Evenness indices (0.3319 and 0.4233), Simpson’s diversity indices (0.6307 and 0.6068), Margalef’s species richness (1.918 and 2.393) and Dominance of (0.3693 and 0.3932) in the farm lands, with Coca farm having the highest density of fruit trees.
