Variabilité Structurale Des Peuplements D’arbres En Forêt De Montagne Du Parc National De Kahuzi-Biega Et Ses Environs, RD. Congo

  • Imani Mugisho Gérard Université Officielle de Bukavu, Faculté des Sciences et Sciences Appliquées, Laboratoire d’Ecologie et Gestion des Ressources Végétales, Bukavu, RDC Université de Kisangani, Faculté de Sciences, Laboratoire d’Ecologie et Aménagement, Kisangani
  • Zapfack Louis Université de Yaoundé 1, Département de Biologie et Physiologie Végétales, Laboratoire de Systématique et d’Ecologies Végétales, Yaoundé, Cameroun
  • Bernard Riera Museum National d’Histoire Naturelle, Laboratoire d’écologie générale, Brunoy, France
  • Mwanga Mwanga Ithe Jean-Claude Centre de Recherche en Sciences Naturelles, Département de Biologie, Laboratoire de Taxonomie Végétale
  • Bulonvu Franclin Institut Supérieur d’Agroforesterie et de Gestion de l’Environnement de Kahuzi Biega, Département eaux et forêts, Bunyakiri, RDC
  • Boyemba Faustin Université de Kisangani, Faculté de Sciences, Laboratoire d’Ecologie et Aménagement, Kisangani

Abstract

This work aims to determine the change in the diametric structure, density, basal area, height and dominance of trees dbh ≥ 10 cm depending on altitude range or forest types. The study was conducted in 30 ha in Kahuzi Biega National Park and surrounding areas in DR Congo. In total, 16,797 individual trees were surveyed. The number of family, genus and species regress following the altitudinal gradient as the density increases. Mountain ecosystems in Kahuzi-Biega and its surroundings are dominated by Meliaceae, Euphorbiaceae, Moraceae, Fabaceae and Rubiaceae families. The Chi square analysis showed that the diametric structure of vegetation succession following a progressive dynamic and varies according to altitude gradient. The average basal area was 35 m²/ha. The analysis of variance (ANOVA) and post hoc Tukey test does not prove the impact of altitude on the basal area. But it becomes low in elevation due to the reduced diameter of the trees. The vertical structure was analyzed according to the classification IUFRO (International Union of Forest Research Organizations). The maximum height was 48 m and becomes lower in altitude. The tree height diameter relationship varies according altitude range so that the models H/D in this area should be developed for each forest type. We determine that the dominance of woody species following the altitude effect; only Strombosia scheffleri and Xymalos monospora dominated by its basal area, abundance and frequency of the various altitude horizons.

Downloads

Download data is not yet available.
Published
2016-08-29
How to Cite
Gérard, I. M., Louis, Z., Riera, B., Jean-Claude, M. M. I., Franclin, B., & Faustin, B. (2016). Variabilité Structurale Des Peuplements D’arbres En Forêt De Montagne Du Parc National De Kahuzi-Biega Et Ses Environs, RD. Congo. European Scientific Journal, ESJ, 12(23), 88. https://doi.org/10.19044/esj.2016.v12n23p88