Journal of
Ecology and The Natural Environment

  • Abbreviation: J. Ecol. Nat. Environ.
  • Language: English
  • ISSN: 2006-9847
  • DOI: 10.5897/JENE
  • Start Year: 2009
  • Published Articles: 389

Full Length Research Paper

Long-term ecological impacts of harvesting non-timber forest products on tree species diversity at the periphery of Mbam and Djerem National Park, Cameroon

Souare Konsala1,2*, Amougou Akoa2, Biye Elvire-Hortense2 and Fotso Roger-Corneille3
1Department of Environmental Sciences, The Higher Institute of the Sahel, University of Maroua, P. O. Box 46 Maroua, Cameroon. 2Laboratory of Plant Biology, Department of Plant Biology, Faculty of Science, University of Yaoundé I,  P.O. Box 812 Yaoundé, Cameroon. 3Wildlife Conservation Society (WCS)/Cameroon, P.O. Box 3055 Messa, Yaoundé, Cameroon.
Email: [email protected]

  •  Published: 31 August 2012

Abstract

Non-timber forest products (NTFPs) strongly contribute to livelihood security of forest-adjacent communities. This study examined the impacts of their harvesting on tree species diversity at the periphery of Mbam and Djerem National Park (Cameroon). Tree species diversity, with diameter at breast height (dbh) ≥ 10 cm, was analyzed in small plots (10 × 100 m) along seven 1-ha transects. Species diversity and floristic composition of undisturbed and disturbed sites were compared in order to obtain an indication of the impact of harvesting NTFPs. A total of 1294 stems was recorded, representing 99 species, 96 genera and 36 families. Shannon diversity index values were highest in undisturbed sites (H’ > 3.5 bits), and lower in disturbed sites (H’ < 3.5 bits). Analysis of variance showed significant differences in mean diversity measures between the two sites (p = 0.047). Mean number of stems cut within the disturbed sites was 15.5 ± 5.5 stems ha-1. The park’s region was found to be rich in Euphorbiaceae, Caesalpiniaceae and Annonaceae. The survey highlighted the effectiveness of harvesting NTFPs in the region and its impacts on tree species diversity. Efforts should be made more in order to improve the protection of the park, and the development of a suitable regional conservation of biodiversity.

 

Key words: Mbam and Djerem National Park, non-timber forest products, seven 1-ha transects, biodiversity, conservation.