Publications Scientifiques

[ Article ] Distribution of tree species along a gallery forest–savanna gradient: patterns, overlaps and ecological thresholds

Date de soumission: 23-09-2016
Année de Publication: 2013
Entité/Laboratoire Laboratoire de Biomathématiques et d'Estimations Forestières (LABEF)
Document type : Article
Discipline(s) : Sciences Environnement &Ecologie
Titre Distribution of tree species along a gallery forest–savanna gradient: patterns, overlaps and ecological thresholds
Auteurs
Journal: Journal of Tropical Ecology
Catégorie Journal: Internationale
Impact factor: 0.904
Volume Journal: 29
DOI: 10.1017/S0266467412000727
Resume Savannas intermingled with gallery forests are dynamic habitats typical in Africa. This study aims to determine if differences in species traits lead to non-overlapping distribution of gallery-forest and savanna species and abrupt transition between gallery forest and savanna. Tree species densities were measured in 375 plots of 1500 m2 covering a total sample area of 56.25 ha along forty 3-km transects located at right angles to a riverbed with gallery forest into surrounding savanna. Location, vegetation type, soil physical properties, erosion and fire occurrence were recorded as site factors. Data analysis included the quantification of co-occurrence patterns, threshold indicator taxa analysis and fuzzy set ordination. The gallery forest–savanna gradient predicted floristic composition of plots with a correlation of 0.595 but its accuracy was locally modified by the occurrence of fire and the physical properties of soil that covered more than 30% of the range of residuals. The distribution of gallery-forest and savanna tree species did not overlap. Along the gallery forest–savanna gradient, savanna species gradually increased in density while gallery-forest species showed a community threshold at 120 m from the river beyond the width of gallery forest. The forest species driving this trend should play an important role in the dynamics of gallery forest–savanna boundaries.
Mots clés Africa, Benin, community analysis, ecological thresholds, environmental synthesis, fuzzy set ordination, indicator species, species co-occurrence, vegetation dynamics, woody flora
Pages 25 - 37
Fichier (PDF)

Publications par entité

  • Centre de Formation et de Recherche en matière de Population (CEFORP) (0)
  • Centre Interfacultaire de Formation et de Recherche en Environnement pour le Développement Durable (CIFRED) (0)
  • Chaire Internationale en Physique Mathématique et Applications (CIPMA-Chaire UNESCO) (0)
  • Ecole Nationale d'Administration et de Magistrature (ENAM) (0)
  • Ecole Nationle d'Economie Appliquée et de Management (0)
  • Ecole Normale Supérieure (0)
  • Ecole Polytechnique d'Abomey-Calavi (EPAC) (0)
  • Faculté de droit et de Science Politique (FADESP) (0)
  • Faculté des Lettres et Sciences Humaines (FLASH) (0)
  • Faculté des Sciences Agronomiques (0)
  • Faculté des Sciences de la Santé (FSS) (0)
  • Faculté des Sciences Economiques et de Gestion (FASEG) (0)
  • Faculté des Sciences et Techniques (FAST) (0)
  • Faculté des Sciences Humaines et Sociales (FASHS) (0)
  • Institut de Formation et de Recherche en Informatique (IFRI) (0)
  • Institut de Mathématiques et de Sciences Physiques (IMSP) (0)
  • Institut National de l'Eau (INE) (0)
  • INSTITUT NATIONAL DE LA JEUNESSE DE L’EDUCATION PHYSIQUE ET SPORT(INJEPS) (0)
  • Institut National des Métiers d'Art d'Archéologie et de la Culture (INMAAC) (0)
  • Institut Régional de Santé Publique (IRSP) (0)

Publications par sexe

  • Femme( 905 )
  • Homme (