alexa VEGETAL DIVERSITY AND STRUCTURE OF ONE STRATUM IN THREE


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Research Article

VEGETAL DIVERSITY AND STRUCTURE OF ONE STRATUM IN THREE SITES OF YINGUI´S FOREST MANAGEMENT UNIT (CAMEROON-CENTRAL AFRICA): A COMPARATIVE STUDY

Fridolin Choula1, Richard Jules Priso1*, Din Ndongo1, Jean Paul Kamdem2, and Victor Désiré Taffouo1
  1. Facultyof Science, University of Douala, P.o. Box 24157 Douala– Cameroon.
  2. Departamento de Química, Programa de Pós-Graduacão em Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS CEP 97105-900, Brazil
Corresponding Author: Richard Jules Priso, E-mail: [email protected]
Received: 27 August -2013 Accepted: 15th Sept-2013
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Abstract

The aim of this study was to investigate and compare the floristic composition of three sites belonging to the stratum “evergreen wet dense forest with partial logging and low density” of Yingui´s Forest Management Unit (FMU), located between the Centre and the Littoral Regions in Cameroon), with an emphasis on their structural parameters and diversity indices. A total of 18365 individuals with diameter at breast high (DBH) ≥ 20 cm belonging to 305 species, 203 genera and 55 families was recorded during the surveys. Diameter structures showed that the three population of the FMU had a regressing exponential structure. The Shannon - Weaver diversity index (H’) varied from 6.53 (site 3) to 6.73(site 2) with an evenness from 0.818 (site 1) to 0.884 (site3).Those high indices can be explained by the large number of species met (265 in site 1, 233 in site 2 and 167 in site 3) and of individual met (13 238 in site 1, 4 114 in site 2 and 1 013 in site 3). Concerning exploitable species, the Student t-test showed a significant difference between site 3 and the two other sites (p < 0.05). Site 3 had specific composition different to those found in site 1 and site 2. Taken together, our results can contribute to increase the data bank on Yingui´s FMU and at national level, can ameliorate the management of forests production.

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