Abstract
ABSTRACT
This study was conducted to determine woody tree composition in Aliero local government, Nigeria. The Point Quarter Centre Method (PQCM) was used to enumerate the tree species in the study area. Ten (10) transects of 1 km (1000m) length each was cut in each of the survey area (Aliero, DanWarai and Sabiyal District). Out of the ten (10) transects, three (3) were randomly selected in each survey area. These transects were pegged at 100m interval and the point centre quadrant dropped systematically at this points which gave a total of 30 sampling points. Only trees of 1m and above in height nearest to the sampling point in each quarter of the quadrant were enumerated and recorded. Data obtained from tree species composition was analysed using the tree species relative density (RD) and classified as abundant (RD ≥ 5.00), frequent (4.00 ≤ RD ≤ 4.99), Vulnerable (3.00 ≤ RD ≤ 3.99), rare (1.00 ≤ RD ≤ 2.99) and threatened / endangered (0.00 < RD ≤ 1.00). 37, 33 and 32 woody tree species were encountered in Aliero, Danwarai and Sabiyel districts respectively. Eighteen (18) species were recorded endangered in Aliero District, thirteen (13) species in DanWarai District and twelve (12) in Sabiyal District. Enactment of environmental laws associated with conservation and preservation of woody species in the study area for sustainability is recommended. NGOs and CBOs should be encouraged to take active part in community forestry activities in order to reduce the pressure on the forest tree species.

Key words: Woody tree, composition, Point Quarter Centre Method (PCQM), Relative density