Analyzing Tree Species Composition, Diversity and Carbon Storage in Damaturu, Yobe State, Nigeria

Abstract

This study assessed the composition, diversity and aboveground carbon of woody species in Damaturu, Yobe State, Nigeria. A total of 60 sample points were randomly generated across the area and quadrats of 30x30m were laid. All woody species encountered were identified and enumerated. Species height and diameter at breast height (DBH), were measured directly during the field survey while species characteristics such as composition, diversity and dominance were computed from the field data. A total of 204 stems belonging to 17 species and 11 families were identified. Results show that the city is composed of few species with Azadirachta indica, Vatex doniana, Terminalia ivorensis  and Polyalthia longifolia being the dominant species. Tree species in the city generally have small to moderate trunk diameter and height while species diversity is considerably low (H’ = 1.65) which could be attributable to both human and climatic factors. The total carbon stored by trees in the city was estimated to be 6,395.11kg carbon which could be translated to approximately 6.4t. This is lower than what is obtained in many cities in the region. Higher carbon was contributed by Azadirachta indica, Vatex doniana, Terminalia ivorensis, Adansonia digitata and Khaya senegalensis. There is the need for planting more species of trees to boost the diversity and carbon storage of the city. This will go a long way in improving the ecosystem services provided by urban trees and the long run urban resilience.