International Journal of
Biodiversity and Conservation

  • Abbreviation: Int. J. Biodivers. Conserv.
  • Language: English
  • ISSN: 2141-243X
  • DOI: 10.5897/IJBC
  • Start Year: 2009
  • Published Articles: 600

Full Length Research Paper

Forest structure and carbon stocks of Osun-Osogbo Sacred Grove, Nigeria

Oladele Fisayo FALADE
  • Oladele Fisayo FALADE
  • Department of Forest Production and Products, University of Ibadan, Oyo State, Nigeria.
  • Google Scholar
Adesoji Joshua TAIWO
  • Adesoji Joshua TAIWO
  • Department of Forest Production and Products, University of Ibadan, Oyo State, Nigeria.
  • Google Scholar


  •  Received: 07 May 2019
  •  Accepted: 23 September 2019
  •  Published: 31 January 2020

Abstract

Forest trees and soil are considered for climate change mitigation. Forest structure of the grove is required to predict its capacity to mitigate climate change. Therefore, the objective of this study was to determine the forest structure and carbon stocks of Osun-Osogbo Sacred grove. Five (30 × 30 m2) plots were demarcated in Old-growth forest (OF) and Re-growth forest (RF). Trees with ≥10 cm diameter-at-breast-height (dbh) were identified to species level and enumerated. Tree height and dbh were measured and stem volumes were converted to carbon stock. Soil samples were collected with cores at three soil depths, oven-dried and carbon content estimated. The tree species diversity and richness indices of OF was higher than OR. Diameter distribution of OF and RF expressed reverse J-shaped and rotated sigmoid curves, respectively. The stem carbon stock ranged from 0.12±0.00 (OF) to 0.02±0.00 Mg/ha (RF). The soil carbon stock ranged from 0.65 (OF) to 0.90 Mg/ha (RF). Stand structure of OF was more develop than RF. The OF and RF contained high stem and soil carbon stocks, respectively. Forest structure enhances stem carbon stock of Old-growth forest while soil of Re-growth forest is also an option for carbon sequestration.

 

Key words: Carbon sequestration, stem diameter distribution, carbon stock, forest structure, old-growth forest.