The study was conducted to study tree species composition and diversity among fragments at
various attitudes in Bagale Forest Reserve, Adamawa State, North East Nigeria. Tree species
composition was 308 individuals made up of 42 trees species in 21 families. Diversity
assessments among the fragments and altitudes showed that Tudun Wada Holin, Modire, Lugga
and Wurodole had diversity values of 3.22, 1.18, 1.48, 2.12, 1.94 respectively, equally common
species (eH1) of 25, 3.27, 4.38, 8.3 and 6.96 respectively. Vitellaria paradoxa had the highest
relative density of 14.1% relative dominance of 9.5%, followed by Lannea Kerstingi with 8.6%
and Terminalia glaucescence 9.6%.