Impact of Grazing Intensity on Floristic Diversity and Woody Structure in Grazing Area Near Kaboré Tambi National Park (Burkina Faso)

Abstract

Natural forests are under pressure due to intensification of anthropogenic activities, especially in the destination zone of pastoralists. This study aims to evaluate the impact of the sedentarization of pastoralists on the floristic diversity and vegetation structure of a grazing area near KaboréTambi National Park, in order to improve the management of this ecosystem. For this purpose, floristic census and dendrometric measurements were carried out in 0.25 ha plots (50 m x 50 m) following a gradient of increasing pastoral pressure from the place of residence to the core of the park, through a systematic sampling design. The results show that the floristic richness has significantly increased (F = 6.406; p = 0.013) following an increasing gradient of pastoral pressure. However, despite a stable structural dynamics and a high regeneration rate (> 80%), the low densities and basal areas of woody trees near pastoralists' homes, indicate a degradation state of woody resources. Therefore, in the context of sustainable management of natural resources and securing pastoral systems, several intervention strategies involving the main actors have been recommended in the grazing area.

Diversité floristique, structure et distribution des groupements végétaux des parcours d’accueil des transhumants dans la Basse et Moyenne Vallée de l’Ouémé au Bénin

“…En revanche, la tendance inverse a été observée pour les formations peu perturbées. Toutefois, Zampaligre et al (2019) ont montré que de nombreuses espèces s'installent à la faveur de la perturbation induite par la pâture. Ainsi, l'action anthropique et, en particulier, l'impact de la pâture sur la biodiversité végétale sont assez controversés (Achard et al, 2001).…”

Joint monitoring of livestock stocking rates and rangeland vegetation of Hombori district in Mali during the 2010-2011 dry season

“…The mean rate of fodder intake in the service areas of the 20 water point clusters indicates that despite the large numbers of livestock recorded at the water points and the weak mobility of the resident herds, the overall stocking rate in the Hombori district remains low, as it involved an average grazing exploitation rate of only 9.4% of the fodder resource. This rate invalidates the statement of widespread 'overgrazing' of forage resources by livestock in the northern Sahel (Zampaligré et al, 2019) often advanced in rangeland ecology and development and natural resource management projects, and already questioned in the 80's (Gilles and Jamtgaard, 1981). However, stocking rates and forage use rates varied widely between service areas of water point clusters.…”

Variabilité démographique de Saba senegalensis (A. DC.) Pichon suivant le gradient climatique au Burkina Faso

“…En effet, ces prélèvements par les populations locales pour leurs besoins en pharmacopée, en énergie et en artisanat (Ouédraogo et al, 2017 ;Traoré et al, 2019) constituent une menace pour la survie de cette espèce. L'exploitation des différentes parties de l'arbre se manifeste souvent par des dégâts de diverses formes généralement observés sur les tiges et qui conduisent à la mort des individus (Zampaligré et al, 2019).…”