Journal of
Ecology and The Natural Environment

  • Abbreviation: J. Ecol. Nat. Environ.
  • Language: English
  • ISSN: 2006-9847
  • DOI: 10.5897/JENE
  • Start Year: 2009
  • Published Articles: 370

Full Length Research Paper

Structure of Acacia senegal (L.) wild settlements in southwest Niger: Case of the gum tree site in the rural district of Guéchémé

Abdoul Kader Soumaila SINA
  • Abdoul Kader Soumaila SINA
  • Department of Biology, School of Sciences and Technical Studies, Abdou Moumouni University of Niamey, GARBA Mounkaila Laboratory, BP 1066, Niamey, Niger.
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Abdou AMANI
  • Abdou AMANI
  • National Institute for Agronomical Research of Niger (INRAN), BP 429 Niamey, Niger.
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Laouali ABDOU
  • Laouali ABDOU
  • School of Agronomical Sciences, University of Diffa, BP 78, Diffa, Niger.
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Amadou GARBA
  • Amadou GARBA
  • Department of Biology, School of Sciences and Technical Studies, Abdou Moumouni University of Niamey, GARBA Mounkaila Laboratory, BP 1066, Niamey, Niger.
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Ali MAHAMANE
  • Ali MAHAMANE
  • Department of Biology, School of Sciences and Technical Studies, Abdou Moumouni University of Niamey, GARBA Mounkaila Laboratory, BP 1066, Niamey, Niger.
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  •  Received: 15 January 2020
  •  Accepted: 17 March 2020
  •  Published: 31 March 2020

Abstract

This study conducted in the rural district of Guéchémé (Tibiri county, Dosso region, Niger) aims at characterizing Acacia senegal settlements of the village of Lido. The methodology consisted in floristic sampling of 1000 m2 plots, measuring diameters 20 cm off the ground for shrubs and 1.30 m for trees. The results made it possible to determine the structure of A. senegal, representing significant densities (238.75 plants/ha). The species represent a high regeneration rate on the site (24.71%) but with an increasing mortality rate over time. The diameter variations and average heights among plants of different plantation years are not significant. In contrast, the average annual growth variations in terms of diameter and height are not significant (p = 0.005). The settlements represent a shrubby structure, the C-shape parameter valued at 3.6 (1 < C < 3.6), feature a positive or right asymmetric distribution of monospecific settlements with dominant younger plants or plants with smaller diameters.

 

Key words: Acacia senegal, Guéchémé, Niger, structures.