[ Structure démographique de la végétation ligneuse de la forêt protégée de Baban Rafi (Sud-Niger) ]
Volume 33, Issue 2, July 2021, Pages 414–425
Barmo Soukaradji1, Abdou Amani2, Inoussa Maman Maârouhi3, Ichaou Aboubacar4, and Mahamane Ali5
1 Institut National de la Recherche Agronomique du Niger (INRAN), BP 429 Niamey, Niger
2 Institut National de la Recherche Agronomique du Niger (INRAN), BP 429 Niamey, Niger
3 Université Abdou Moumouni de Niamey, Faculté des Sciences et Techniques, Département de Biologie, Laboratoire Garba Mounkaila, BP: 10662 Niamey, Niger
4 Institut National de la Recherche Agronomique du Niger (INRAN), BP 429 Niamey, Niger
5 Université de Diffa, Faculté des Sciences Agronomiques, BP 78, Diffa, Niger
Original language: French
Copyright © 2021 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The study aims to characterize the demographic structure of the vegetation of the protected forest Baban Rafi located in the department Madarounfa 50 km south of Maradi. The data were collected based on a forest inventory in 105 plots of 1000 m² installed on 17 transects varying in length from 1 to 5 km. Data analysis has established the list of plants, species diversity, the horizontal structure, vertical structure, and regeneration of woody plants. A total of 52 woody species distributed in 40 genera and 21 families were inventoried. The best-represented families are respectively the Combretaceae and Fabaceae-Mimosoideae. The most important species are Guiera senegalensis, Combretum micranthum, and Combretum nigricans. The average density of woody species (994.86 ± 343.71 individuals / ha) and that of regeneration (17,092.95 ± 10,431.80 seedlings / ha) indicate a good regeneration capacity of the forest. The values of the index of Shannon and evenness Pielou are 3.8 bits and 0.68 bits respectively. The diameter structures of the woody stand and those of the dominant species show a concentration of young individuals of the class from 5 to 10 m. Those in height show a predominance of individuals of heights between 1 and 5 m. These results provide additional information on the current state of woody stands in the Baban Rafi forest and can be used in biodiversity conservation and the management of protected forests in Niger.
Author Keywords: Population structure, woody stands, Baban Rafi forest, Niger.
Volume 33, Issue 2, July 2021, Pages 414–425
Barmo Soukaradji1, Abdou Amani2, Inoussa Maman Maârouhi3, Ichaou Aboubacar4, and Mahamane Ali5
1 Institut National de la Recherche Agronomique du Niger (INRAN), BP 429 Niamey, Niger
2 Institut National de la Recherche Agronomique du Niger (INRAN), BP 429 Niamey, Niger
3 Université Abdou Moumouni de Niamey, Faculté des Sciences et Techniques, Département de Biologie, Laboratoire Garba Mounkaila, BP: 10662 Niamey, Niger
4 Institut National de la Recherche Agronomique du Niger (INRAN), BP 429 Niamey, Niger
5 Université de Diffa, Faculté des Sciences Agronomiques, BP 78, Diffa, Niger
Original language: French
Copyright © 2021 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The study aims to characterize the demographic structure of the vegetation of the protected forest Baban Rafi located in the department Madarounfa 50 km south of Maradi. The data were collected based on a forest inventory in 105 plots of 1000 m² installed on 17 transects varying in length from 1 to 5 km. Data analysis has established the list of plants, species diversity, the horizontal structure, vertical structure, and regeneration of woody plants. A total of 52 woody species distributed in 40 genera and 21 families were inventoried. The best-represented families are respectively the Combretaceae and Fabaceae-Mimosoideae. The most important species are Guiera senegalensis, Combretum micranthum, and Combretum nigricans. The average density of woody species (994.86 ± 343.71 individuals / ha) and that of regeneration (17,092.95 ± 10,431.80 seedlings / ha) indicate a good regeneration capacity of the forest. The values of the index of Shannon and evenness Pielou are 3.8 bits and 0.68 bits respectively. The diameter structures of the woody stand and those of the dominant species show a concentration of young individuals of the class from 5 to 10 m. Those in height show a predominance of individuals of heights between 1 and 5 m. These results provide additional information on the current state of woody stands in the Baban Rafi forest and can be used in biodiversity conservation and the management of protected forests in Niger.
Author Keywords: Population structure, woody stands, Baban Rafi forest, Niger.
Abstract: (french)
L’étude vise à caractériser la structure démographique de la végétation de la forêt protégée de Baban Rafi située dans le département de Madarounfa à 50 km au sud de Maradi. Les données ont été collectées sur la base d’un inventaire forestier dans 105 placettes de 1000 m² installées sur 17 transects de longueur variant de 1 à 5 km. L’analyse des données a permis d’établir la liste floristique, la diversité spécifique, la structure horizontale, la structure verticale et la régénération des peuplements ligneux. Au total 52 espèces ligneuses réparties dans 40 genres et 21 familles ont été inventoriées. Les familles les mieux représentées sont respectivement les Combretaceae et les Fabaceae-Mimosoideae. Les espèces les plus importantes sont Guiera senegalensis, Combretum micranthum et Combretum nigricans. La densité moyenne des espèces ligneuses (994,86 ± 343,71 individus/ha) et celle de la régénération (17092,95 ± 10 431,80 rejets/ha) indiquent une bonne capacité de régénération de la forêt. Les valeurs de l’indice de Shannon et d’équitabilité de Pielou sont respectivement de 3,8 bits et 0,68 bits. Les structures en diamètre du peuplement ligneux et celles des espèces dominantes montrent une concentration des individus jeunes de la classe de 5 m à 10 m. Celles en hauteur montrent une prédominance des individus de hauteurs comprise entre 1 et 5 m.Ces résultats apportent des informations complémentaires sur l’état actuel des peuplements ligneux de la forêt de Baban Rafi et peuvent être utilisés dans la conservation de la biodiversité et l’aménagement des forêts protégées au Niger.
Author Keywords: Structure démographique, peuplements ligneux, forêt Baban Rafi, Niger.
How to Cite this Article
Barmo Soukaradji, Abdou Amani, Inoussa Maman Maârouhi, Ichaou Aboubacar, and Mahamane Ali, “Demographic structure of woody vegetation in the protected forest of Baban Rafi (South-Niger),” International Journal of Innovation and Applied Studies, vol. 33, no. 2, pp. 414–425, July 2021.
