Diversity of Woody Plant Species of Sese Forest, Alge Sachi District, Ilu Abba Bor Zone of Oromia Region, Southwest Ethiopia

Forest provides food and other important materials to survive on land.Ethiopia is one of the richest assemblages of plants in Africa but, Nowadays, plant resources are under several threats.This study was conducted between September 2021 to September, 2021.The objective of this research was to study the diversity of woody plant species of Sese forest, in Alge Sachi district.Vegetation data were collected from a total of 45 plots using 20 20 m (400 m 2 ) plot size for trees and 5 m 5 m (25 m 2 ) sub plots within the main plots for shrubs which were laid down along altitudinal gradient drops.Woody plant species having a diameter at breast height (DBH) > 2.5 cm were recorded.Vegetation data were analyzed using R software version 4.2.1, and Shannon-Wiener Diversity Index, Evenness, Sorensen's similarity coefficient, Cluster analysis were also computed.The density, frequency, basal area, DBH, and Importance Value Index were computed.The vegetation study resulted in the documentation of 80 (71 from plots and 9 from outside of sampling plots) woody plant species belonging to 68 genera and 38 families.Four plant community types were identified.The study area is rich in woody plant diversity, but it's under great pressure due to agricultural expansion, and coffee plantations.Therefore, it is recommended that government should be designed an immediate conservation intervention.