Assessing and monitoring forest species is essential for implementing effective conservation strategies that support biodiversity. This study investigates the structure and growth dynamics of the Afzelia africana (A. africana) stand along the periphery of Benoué National Park (BNP) in northern Cameroon. A forest inventory was carried out at 4 sites located at the four cardinal points of the Bénoué National Park (PNB). Twelve 3000 m x 50 m transects were used, with three transects per study site. Data were collected on density, height, diameter at breast height (Dhp), crown diameter, and biological and vegetative types. To compare A. africana populations between sites, an analysis of variance (ANOVA) was used. Results indicate that wood density is higher in the northern (120 ind. /ha) and southern (90 ind. /ha) peripheries compared to the eastern (54 ind. /ha) and western (28 ind. /ha) peripheries. The distributions of trunk and crown diameters, as well as height, exhibit a bell-shaped pattern, indicating a dominance of middle-class individuals and a scarcity of both regenerating and mature individuals. This distribution suggests that the A. africana stand is under pressure, particularly in the eastern and western peripheries of the BNP. Human activities such as gold panning, charcoal production, and branch pruning, which are most pronounced in the eastern periphery, as well as agriculture and urbanization in the western periphery are contributing to plant instability and the decline of key socio-economic species like A. africana, which is also facing threats of extinction. Raising awareness among local communities and stakeholders could significantly enhance the conservation efforts for this species, particularly by focusing on the protection of juvenile plants and the most disturbed areas.
Published in | International Journal of Natural Resource Ecology and Management (Volume 10, Issue 1) |
DOI | 10.11648/j.ijnrem.20251001.11 |
Page(s) | 1-11 |
Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
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Copyright © The Author(s), 2025. Published by Science Publishing Group |
A. africana, Ecological Characterization, Sustainable Conservation, BNP, Northern Cameroon
[1] | Mama A., Sinsin B., De Canniere C., Canniere E et J. Bogaert J., 2013. Anthropisation et dynamisation des paysages en zone soudanienne au nord du Bénin. Tropicultura, 31(1): 78–88. |
[2] | Soulama S., Kokou E. A., Bétaboalé N., Aqil M. K. A., Tibi B., et Samuel G., 2015. Contribution à l’étude de l’influence des paramètres d’élaboration et optimisation du procédé de mise en œuvre de bio-composites en coques de cotonnier et polystyrène recyclé. Afrique SCIENCE 11(1) (2015) 35-58. |
[3] | Waya E., Ndogotar N., Gomoung D., Nazal A. M. et Ibrahima A., 2022. Caractéristique phytoécologique du Parc National de Manda dans la Province du Moyen-Chari au Tchad. Rev. Ivoir. Sci. Technol., 40: 76–100. |
[4] | Avakoudjo J., Mama A., Toko I., Kindomihou V. et Sinsin B. 2014. Dynamique de l’occupation du sol dans le Parc National du W et sa périphérie au nord-ouest du Bénin. Int. J. Biol. Chem. Sci., 8(6) 2608–2625. |
[5] | Foutse. Y., 2017. Enquête ethnobotanique sur les plantes médicinales utilisées dans la région de l’ouest Cameroun: Etude phytochimique et pharmacologique d’Afzelia africana J. E. Smith ex Pers. Thèse de Doctorat, Université d’Aix-Marseille, 269 p. |
[6] | Konan D, Bakayoko A, Tra Bi Fézan H, Bitignon Bley G A & Piba S C (2015). Dynamisme de la structure diamétrique du peuplement ligneux des différents biotopes de la forêt classée de Yapo-Abbé, sud de la Côte d’Ivoire. Journal of Applied Biosciences, 94: 8869-8879. |
[7] | Alassane, 2018. Anthropisation et dynamique spatiale de la réserve Oti-Keran-Mandouri de 1990 à 2015. Revue de Géographie de l’Université de Ouagadougou, 7(2): 233–259. |
[8] | UICN/PACO, 2008. Evaluation de l’efficacité de la gestion des aires protégées: aires protégées du Tchad. |
[9] | Boumba H. B. G., Samba-K. M. J., 2019. Analyse de l’impact des déterminants de dégradation du couvert végétal sur les composantes environnementales de la réserve de chasse de la Lefini (Congo). EDUCI), Revue de Géographie Tropicale et d’Environnement, N°1 (2019) 75–89. |
[10] | Diouf J. C., 2011. Dynamique du peuplement ligneux au Ferlo (nord - Sénégal), conséquences et perspectives pour une gestion durable. Thèse pour l’obtention du grade de docteur de 3ème cycle de biologie végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, (2011) 263 p. |
[11] | Ajavon Y., Djafarou A., Kooke G. X., Tente B. A. H., 2019. Diversité floristique des sous-bois des plantations de Acacia auriculiformis dans la forêt classée de Pahou au Sud du Bénin. Rev. Ivoir. Sci. Technol., 300: 300–322. |
[12] | Tsakem S. C., 2006. Contribution à l’aménagement du parc National de la Bénoué et au Développement Rural des Zones Cynégétique à Cogestion (N° 1 et 4) au Nord-Cameroun. Mémoire DES en Gestion des ressources animales et végétales en milieux tropicaux. Université de Liège. 68 p. |
[13] | Saleh A., 2012. Un modèle et son revers: la cogestion des réserves de biosphère de Waza et de la Bénoué dans le Nord du Cameroun. Thèse de Doctorat. Universite du Maine à Mans, 338p. |
[14] | Tagueguim E., 2010. Evaluation de la pression anthropique et son impact sur la faune dans les zones d'intérêt cynégétique au tour du Parc National de la Bénoué, nord Cameroun. Master Complémentaire. Université de Liège Belgique, 53 p. |
[15] | Balima, L. H., Nacoulma, B. M. I., Ekué, M. R. M., Kouamé, F. N. G., & Thiombiano, A., 2018. Use patterns, use values and management of Afzelia africana Sm. in Burkina Faso: implications for species domestication and sustainable conservation. Journal of ethnobiology and ethnomedicine, 14(1): 1-14.7. |
[16] | Houessou G. L., Lougbegnon O. T., Gbesso G. H. F., Anagonou S. E. L., Sinsin B. 2012. Ethnobotanical study of the African star apple (Chrysophyllum albidum G. Don) in the Southern Benin (West Africa). Journal of Ethnobiology and Ethnomedicine: 8: 40, 1-10. |
[17] | Onana J, Devineau JL, 2002. Afzelia africana Smith ex Persoon in North Cameroon. Current status of populations and pasture use. J. Ani. Husbandry Vet. Med. Trop. Countries, 55: 39-45. |
[18] | Wulder, M. A., White J. C., Andrewa M. E., Seitz N. E. et Coops N. C., 2009. Forest fragmentation, structure, and age characteristics as a legacy of forest management, Forest Ecology and management 258: 1938-1949. |
[19] | Nadkarni, N. M., McIntosh A. C. S. et Cushing B. J. 2008. A framework to categorize forest structure concepts, Forest Ecology and Management 256: 872-882. |
[20] | Merino, A., Real C., Álvarez-González J. G., Manuel A. et Rodríguez- Guitián M. A. 2007. Forest structure and C stocks in natural Fagus sylvatica forest in southern Europe: The effects of past management, Forest Ecology and Management 250: 206-214. |
[21] | Amougou A. C., 2020. Influence des activités anthropiques et gestion durable des peuplements de Afzelia africana dans le Parc National de la Bénoué Nord-Cameroun. Thèse de Doctorat, Université de Ngaoundéré, Cameroun, 170p. |
[22] | World Wide Fund for Nature (WWF) et Organisation Néerlandaise de Développement (SNV), 2000. Plan d’aménagement pour le développement du parc et de sa zone périphérique. 82p. |
[23] | Letouzey R., 1968. Étude phytogéographique du Cameroun. Paris: Lechevalier. |
[24] | Hall P., et Bawa, K., 1993. Methods to Assess the Impacts of Extraction of Non-Timber Tropical Forest Products on Plant Populations. Economic Botany, 47, 234-247. |
[25] | Peters C. M., 1994. Sustainable harvest of non- timber plant resources in tropical moist forest. An ecological primer: Biodiversity Support Program, Washington DC, 49 p. |
[26] | Arbonnier, 2009. Trees, shrubs and lianas of dryland West Africa. CIRAD-MNHN-IUCN. |
[27] | Raunkiaer C. 1934. The life forms of plants and statistical plant geography. Clarendon Press, London, 632 p. |
[28] | Schnell R., 1971. Introduction à la phytogéographie des pays tropicaux: Les problèmes généraux. Les milieux et les groupements végétaux. Gauthier-Villard, Paris, 951 p. |
[29] | Dansereau P., et Lems L., 1957. The grading of dispersal types in Communities and their significance. Contr. Inst. Bot. Montréal 71. 52 p. |
[30] | Lebrun J., 1966. Les formes biologiques dans les végétations tropicales, Bulletin de la Société Botanique de France, 113: sup 2, 164-175, |
[31] | Mandango, M. 1982. Flore et végétation des îles du fleuve de Zaïre dans la Sous-Région de la Tshopo (H-Z). Thèse, Univ. Kisangani 425 p. |
[32] | White, F. 1983. The vegetation map of Africa south of the Sahara. 2nd ed Paris: UNESCO. |
[33] | Sandjong R. C. S., Ntoupka M., Vroumsia T., Ibrahima A., 2018. Caractérisation structurale de la végétation ligneuse du Parc National de Mozogo-Gokoro (Cameroun). Flora et Vegetation Sudano-Sambesica 21, 7-24 |
[34] | Sourou K. B. N., 2017. Importance socioéconomique et caractérisation structurale, morphologique et génétique moléculaire des Haematostaphis bateri Hook F. (prune rouge) au Bénin. Thèse de Doctorat unique, Université de Parakou, Ecole Doctorale des Sciences Agronomiques et de l’Eau Bénin, 147 p. |
[35] | Thiombiono A., 2005. Les Combretaceae du Burkina Faso: taxonomie, écologie, dynamique et régénération des espèces. Thèse de doctorat d’Etat, Université d’Ouagadougou, Burkina Faso. 290p. |
[36] | Aïtondji A. L., Toyi M. S. S., Kassa B., Sinsin B., 2015. Caractéristiques floristiques, phytosociologiques et écologiques de la végétation des carrières en République du Bénin. Science de la Vie et de la terre, REV. CAMES, 03(02): 13-24. |
[37] | Orékan, V. A. 2007. Implémentation du modèle local CLUE-s aux transformations spatiales dans le Centre Bénin aux moyens de données socio-économiques et de télédétection. Thèse de doctorat, Université de Bonn, Allemagne, 204 p. |
[38] | Nacoulma B., M. I., Traoré S., Hahn K. et Thiombiano A., 2011. Impact of land use types on population structure and extent of bark and foliage harvest of Afzelia Africana and Pterocarpus erinaceus in Eastern Burkina Faso. International Journal of Biodiversity and Conservation, 3(3): 62-72. |
[39] | Bationo, B. A., Ouedraogo, S. J. and Guinko, S., 2001. Longévité des graines et contraintes à la survie des plantules de Afzelia africana Sm. dans la forêt classée de Nazinon (Burkina Faso). Annales des Sciences Forestières, 58, 69-75. |
[40] | Tchobsala, 2011. Impact des coupes de bois sur la végétation naturelle de la zone périurbaine de Ngaoundéré (Adamaoua). Thèse de Doctorat. Université de Yaoundé 1. 184p. |
[41] | Amadou Z., 2020. Etudes des corridors; couloir de passage de la faune sauvage dans les aires protégées du Nord-Cameroun. Thèse de Doctorat, Université de Ngaoundéré, Cameroun, 171p. |
[42] | Melom S., Mbayngone E., Bechir A. B., Ratnan N. et Mapongmetsem P. M., 2015. Caractéristiques floristique et écologique des formations végétales de Massenya au Tchad (Afrique centrale). Journal of Animal &Plant Sciences, 2015. Vol. 25, Issue 1: 3799-3813 Publication date 4/5/2015, |
[43] | Nacoulma, B. M. I., 2012. Dynamique et stratégie de conservation de la végétation et de la phytodiversité du complexe écologique du Parc National du W du Burkina Faso. Thèse de doctorat, Université de Ouagadougou, Burkina Faso, 151 p. |
[44] | Donkpegan A. S. L., Hardy O. J., Philippe Lejeune P., Madjidou Oumorou M., Kasso Daïnou K., Jean-Louis Doucet J-L. 2014. Un complexe d’espèces d’Afzelia des forêts africaines d’intérêt économique et écologique (synthèse bibliographique). Biotechnol. Agron. Soc. Environ. 18(2): 1-14. |
[45] | Sinsin B. et al., 2004. Dendrometric characteristics as indicators of pressure of Afzelia africana Sm. Trees dynamics in different climatic zones of Benin. Biodivers. Conserv., 13(8), 1555-1570. |
[46] | Bonou et al., 2009. Characterisation of Afzelia Africana Sm. habitat in the Lama forest reserve of Benin. For. Ecol. Manage., 258, 1084-1092. |
APA Style
Calvin, K. N. J., Tchobsala, Adamou, I. (2025). Structural Characterisation of the Afzelia africana Smith ex persoon Stand in the Benoué National Park, North Cameroon. International Journal of Natural Resource Ecology and Management, 10(1), 1-11. https://doi.org/10.11648/j.ijnrem.20251001.11
ACS Style
Calvin, K. N. J.; Tchobsala; Adamou, I. Structural Characterisation of the Afzelia africana Smith ex persoon Stand in the Benoué National Park, North Cameroon. Int. J. Nat. Resour. Ecol. Manag. 2025, 10(1), 1-11. doi: 10.11648/j.ijnrem.20251001.11
@article{10.11648/j.ijnrem.20251001.11, author = {Koudtou Njanga Jean Calvin and Tchobsala and Ibrahima Adamou}, title = {Structural Characterisation of the Afzelia africana Smith ex persoon Stand in the Benoué National Park, North Cameroon}, journal = {International Journal of Natural Resource Ecology and Management}, volume = {10}, number = {1}, pages = {1-11}, doi = {10.11648/j.ijnrem.20251001.11}, url = {https://doi.org/10.11648/j.ijnrem.20251001.11}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijnrem.20251001.11}, abstract = {Assessing and monitoring forest species is essential for implementing effective conservation strategies that support biodiversity. This study investigates the structure and growth dynamics of the Afzelia africana (A. africana) stand along the periphery of Benoué National Park (BNP) in northern Cameroon. A forest inventory was carried out at 4 sites located at the four cardinal points of the Bénoué National Park (PNB). Twelve 3000 m x 50 m transects were used, with three transects per study site. Data were collected on density, height, diameter at breast height (Dhp), crown diameter, and biological and vegetative types. To compare A. africana populations between sites, an analysis of variance (ANOVA) was used. Results indicate that wood density is higher in the northern (120 ind. /ha) and southern (90 ind. /ha) peripheries compared to the eastern (54 ind. /ha) and western (28 ind. /ha) peripheries. The distributions of trunk and crown diameters, as well as height, exhibit a bell-shaped pattern, indicating a dominance of middle-class individuals and a scarcity of both regenerating and mature individuals. This distribution suggests that the A. africana stand is under pressure, particularly in the eastern and western peripheries of the BNP. Human activities such as gold panning, charcoal production, and branch pruning, which are most pronounced in the eastern periphery, as well as agriculture and urbanization in the western periphery are contributing to plant instability and the decline of key socio-economic species like A. africana, which is also facing threats of extinction. Raising awareness among local communities and stakeholders could significantly enhance the conservation efforts for this species, particularly by focusing on the protection of juvenile plants and the most disturbed areas.}, year = {2025} }
TY - JOUR T1 - Structural Characterisation of the Afzelia africana Smith ex persoon Stand in the Benoué National Park, North Cameroon AU - Koudtou Njanga Jean Calvin AU - Tchobsala AU - Ibrahima Adamou Y1 - 2025/01/24 PY - 2025 N1 - https://doi.org/10.11648/j.ijnrem.20251001.11 DO - 10.11648/j.ijnrem.20251001.11 T2 - International Journal of Natural Resource Ecology and Management JF - International Journal of Natural Resource Ecology and Management JO - International Journal of Natural Resource Ecology and Management SP - 1 EP - 11 PB - Science Publishing Group SN - 2575-3061 UR - https://doi.org/10.11648/j.ijnrem.20251001.11 AB - Assessing and monitoring forest species is essential for implementing effective conservation strategies that support biodiversity. This study investigates the structure and growth dynamics of the Afzelia africana (A. africana) stand along the periphery of Benoué National Park (BNP) in northern Cameroon. A forest inventory was carried out at 4 sites located at the four cardinal points of the Bénoué National Park (PNB). Twelve 3000 m x 50 m transects were used, with three transects per study site. Data were collected on density, height, diameter at breast height (Dhp), crown diameter, and biological and vegetative types. To compare A. africana populations between sites, an analysis of variance (ANOVA) was used. Results indicate that wood density is higher in the northern (120 ind. /ha) and southern (90 ind. /ha) peripheries compared to the eastern (54 ind. /ha) and western (28 ind. /ha) peripheries. The distributions of trunk and crown diameters, as well as height, exhibit a bell-shaped pattern, indicating a dominance of middle-class individuals and a scarcity of both regenerating and mature individuals. This distribution suggests that the A. africana stand is under pressure, particularly in the eastern and western peripheries of the BNP. Human activities such as gold panning, charcoal production, and branch pruning, which are most pronounced in the eastern periphery, as well as agriculture and urbanization in the western periphery are contributing to plant instability and the decline of key socio-economic species like A. africana, which is also facing threats of extinction. Raising awareness among local communities and stakeholders could significantly enhance the conservation efforts for this species, particularly by focusing on the protection of juvenile plants and the most disturbed areas. VL - 10 IS - 1 ER -