Caractéristiques écologiques du peuplement ligneux de la réserve de biosphère du Ferlo (Nord Sénégal)

Abstract

Ngom et al J. Appl. Biosci. 2013. Caractéristiques écologiques du peuplement ligneux de la réserve de biosphère du Ferlo, Sénégal ABSTRACT Objectives : This study aims to characterize the various structural parameters of the woody vegetation in Ferlo Biosphere Reserve (FBR). Methods and Results: In 2011 measurement of dendrometric characteristics of trees and an inventory of the woody flora was carried out in 110 plots of 900 m² each. The total specific richness was 49 species and the Journal of Applied Biosciences 65:5008 -5023 ISSN 1997-5902 Ngom et al J. Appl. Biosci. 2013. Caractéristiques écologiques du peuplement ligneux de la réserve de biosphère du Ferlo, Sénégal 5009 average of the specific richness was 5.8 species / plot. The analysis of centesimal frequencies showed that Guiera senegalensis (75%), Combretum glutinosum (65.5%), Boscia senegalensis (63.6%) and Pterocarpus lucens (60.9%) are the most common species. Tree density is higher in the central area (392 ind / ha) while the basal area and the recovery are higher in the buffer zone with respectively 9.17 m²/ha and 43%. Concerning the structure, the woody trees have a relatively high proportion of seedlings. In fact, over 90% of trees surveyed have heights between 0 and 6 m and circumference between 10 and 100 cm, which shows the importance of the shrub layer in the FBR. With regard to the ecological importance, three species are distinguished : Pterocarpus lucens (18%), Guiera senegalensis (16%) and Combretum glutinosum (13%). The rate of regeneration of plant population is 72% in the FBR. It is twice higher in the core area (79%) which is less anthropized than the buffer zone (36%) and the transition zone (39%). Guiera senegalensis has the highest potential of regeneration with a specific regeneration index more than 62%. Conclusion and applicability of the results: These results demonstrate the potential of the FBR to ensure the dual role of biodiversity conservation and provision of ecosystem services to local communities.

Biodiversity and Structure of Woody Plants of Sahelian Rangelands of Baban Rafi, Niger

“…The rangelands under this study is relatively poorly diversified with a total number of 21 woody plants species in accordance with vegetation inventory by Ndiaye et al, (2010) at Ranerou but lower than Ngom et al (2013) in the Ferlo and Baggian et al (2014) in the agroforestry park of Niger. Among these species, Combretum micranthum, Guiera senegalensis and Combretum nigricans belonging to the family of Combretaceae appear clearly as the most common and widespread species with a very high importance values.…”

La Végétation Des Inselbergs Du Sahel Burkinabè

“…• la surface terrière moyenne S t = d • le taux de régénération du peuplement est le rapport entre l'effectif total des jeunes plants (individus dont le diamètre du tronc n'atteint pas 5 cm) et l'effectif total du peuplement (Ngom et al, 2013) :…”

Botanical and Ethnoveterinary Surveys of Two Acacias (<i>Acacia raddiana</i> and <i>Acacia nilotica</i>) Exploited in Small Ruminant Rearing in Sahelian Area of Burkina Faso

“…This population was dominated by individuals belonging to the first classes [10][11][12][13][14][15] with an average of 165 individuals/ha. However, the inverted "J" structure of the diameter classes is an indicator of good regeneration [14].…”

“…It varies according to the different zones because its value depends strongly on the presence of large trees with large crowns [12]:…”