PAPER TITLE :VARIATION IN THE ABUNDANCE OF TREE AND INSECT SPECIES IN SELECTED FOREST RESERVES IN ONDO STATE, NIG

JOURNAL Of SUSTAINABLE TECHNOLOGY | VOLUME 6 NUMBER 1 2015

Paper Details

  • Author(s) : ADEDUNTAN, S.A.* and OLUSOLA, J.A.
  • Abstract:

This study was carried out to examine the variation in the abundance of tree and
insect species in some selected forest reserves in Ondo State Nigeria. The study also examined the
relationship between soil mesofauna, tree and the insect species. Eight sample plots (20 m by 40 m)
were demarcated where enumeration of trees species, sampling of insets, and collection of soil
samples were carried out. A total number of 1167 woody trees species were encountered from all
forest reserves, distributed in to 360, 371, 274, and 162 in Akure/Ofosu, Oluwa, Akure Queen’s
forest and Owo forest reserves respectively. Shannon-Wiener diversity index values are 3.60,
3.57, 3.34 and 3.31 for Oluwa, Akure/Ofosu, Owo and Akure Queen’s forest reserves respectively.
Trees species richness was higher in Oluwa forest reserve (61), and the least was found in Owo
(38). Then were nine hundred and fifty six (956) insects’ species with 123, 234, 236 and 363 in
Owo, Akure/Ofosu, Oluwa and Akure (Queen) forest reserve respectively. Shannon-Weiner diversity
index values for the reserves were 3.07, 3.08 3.17 and 3.31 for Owo, Akure/ Ofosu, Oluwa and
Akure Queen’s forest reserves were respectively. Insects’ species richness was highest in Akure
Queens forest (36) while the least was found in Owo (26). The results of soil mesofauna shows that
309 mesofauna were recorded in the Oluwa forest, 250, 233 and 115 were encountered in Akure/
Ofosu, Akure Queen’s and Owo forest reserves respectively. The correlation coefficient between
insects and mesofauna was positive and high (0.7747). However the correlation coefficient between
trees and insects abundance was negative (-0.3800) while those of trees and mesofauna abundance
was positive but low (0.1120). Suggestions were made on how our forest can be managed sustainably.