Floristic diversity, stand structure and plant life traits of Mount Nlonako forest (Littoral, Cameroon)
Paper Details
Floristic diversity, stand structure and plant life traits of Mount Nlonako forest (Littoral, Cameroon)
Abstract
Cameroonian mountain forests are regarded as biodiversity concentration areas. These forests, already naturally isolated from each other within the country due to climatic or geomorphologic variations, are today extremely fragmented by anthropogenic activities. This study was aimed to assess the floristic diversity and characterizing the population structure of Mount Nlonako Forest. In total, 80 quadrats of 40 m × 40 m (12.8 ha) were established with respect to altitudes (lower altitude (A) and higher altitude (B)) in the Mount Nlonako forest. All individuals having a diameter at breast height (DBH) of 10 cm or greater were identified in each established quadrat. A total of 6,181 trees (3,720 at lower altitude (A); 2,461 at higher altitude (B)) were categorized into 278 species (177 at A; 203 at B), belonging to 177 genera (111 at A; 144 at B) and 52 families (40 at A; 46 at B). Sterculia rhinopetala and Pycnanthus angolensis were the predominant plant species at elevated and lower altitude, respectively. The predominant plant groups (FIV) in terms of families were Fabaceae and Myristicaceae at elevated altitude, whereas Malvaceae and Apocynaceae were prevalent at lower altitude. The Shannon-Wiener index value of 3.12 bits in the entire study area (3.17 bits at A; 3.14 bits at B) indicates that the Mount Nlonako forest is less diversified but has a good distribution of species within individuals (Pielou’s index ≥ 0.89) as well as individuals within species (Simpson’s index ≥ 0.93). Average stand density ranges from 585.5 stems/ha (A) to 384.53 stems/ha (B). The distribution of trees by diameter class reveals a majority of shrubs and a few large trees. The abundance of mesophanerophytes suggests adaptive plant strategies similar to the striving approach. The dominance of Guinean-Congolese domain species demonstrates a remarkable regeneration of species in this forest despite anthropogenic pressures. This emphasizes the vital necessity for the conservation of this area.
Adamou M. 2010. Study of the lower Tarka valley (Niger), characterization and use of water resources. Final internship report, 17–76. https://www.memoireonline.com/04/12/5659/.
Agbodjogbe GJ. 2011. Analyse de la structure des galeries forestières de la réserve totale de faune de Tamou (RTFT) en République du Niger. Mémoire de Master international, BEVT, Muséum National d’Histoire Naturelle, Paris IRD, Sud expert plantes, Université de Dschang, 59.
Aiba SI, Kitayama K. 1999. Structure, composition, and species diversity in an altitude-substrate matrix of rainforest tree communities on Mount Kinabalu, Borneo. Plant Ecology 140, 139–157.
Angiosperm Phylogeny Group (APG III). 2009. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. Botanical Journal of the Linnean Society 161(2), 105–121. http://dx.doi.org/10.1111/j.1095-8339.2009.00996.x.
Atoupka AM. 2016. Diversité et usages des ressources ligneuses dans le terroir de Koupa-Matapit, Ouest Cameroun. Mémoire d’ingénieur de conception des Eaux, Forêts et Chasse, Faculté d’Agronomie et des Sciences Agricoles, Université de Dschang, 107.
Balinga MPB, Issembe YA, Sunderland TCH, Nzabi T, Obiang D, Nyangadouma R. 2005. Quantitative vegetation assessment of the Monte Mitra forest using 1-hectare biodiversity plots (BDP’s). A biodiversity assessment of the Monte Mitra forest, Monte Alen National Park, Equatorial Guinea, 94. http://carpe.umd.edu/resources/Documents/.
Balinga MPB. 2006. A vegetation assessment of the Waka National Park, Gabon. CARPE Report, 83. http://carpe.umd.edu/resources/Documents/. Cited 4 July 2009.
Beina D. 2011. Diversité floristique de la forêt dense semi-décidue de Mbaïki, République Centrafricaine: Étude expérimentale de l’impact de deux types d’intervention sylvicole. Thèse, Université de Picardie Jules Verne, 218. https://www.u-picardie.fr/edysan/wp-content/uploads/2013/06/These-Denis-Beina-29112011.pdf.
Bergl RA. 2007. Conservation biology of the Cross River gorilla (Gorilla gorilla diehli). Ph.D. Thesis, City University of New York, 197.
Bouko SB, Sinsin B, Soulé GB. 2007. Effets de la dynamique d’occupation du sol sur la structure et la diversité des forêts claires et savanes du Bénin. Tropicultura 25(4), 221–227. http://www.tropicultura.org/text/v25n4/221.pdf.
Cable S, Cheek M. 1998. The plants of Mount Cameroon: A conservation checklist. Royal Botanic Gardens Kew, 279.
Caldeira MC, Hector A, Loreau M, Pereira JS. 2005. Species richness, temporal variability, and resistance of biomass production in a Mediterranean grassland. Oikos 1(10), 115–123. https://www.jstor.org/stable/3548424.
Cheek M, Onana JM. 2021. The endemic plant species of Mt Kupe, Cameroon with a new critically endangered cloud-forest tree species, Vepris zapfackii (Rutaceae). Kew Bulletin, 1–14.
Cheek M, Pollard BJ, Darbyshire I, Onana JM, Wild C. 2004. The plants of Kupe, Nwanenguba, and the Bakossi Mountains, Cameroon: A conservation checklist. Royal Botanic Gardens, Kew, 508.
Dajoz R. 1982. Ecology precision. 4th edition. Paris, Bordas, 503.
Dalimer J, Achard F, Delhez B, Desclée B, Bourgoin C, Hugh E. 2022. Répartition des types de forêts et évolution selon leur affectation. In Les forêts du bassin du Congo: État des Forêts 2021, 133. https://www.cifor.org/publications/pdf_files/Books/Etat-des-forets-2021.pdf.
De Wasseige C, De Marcken P, Bayol N, Hiol Hiol F, Mayaux P, Desclée B, Billand A, Nasi R. 2012. Les forêts du Bassin du Congo – État des forêts 2010. Office des publications de l’UE, Luxembourg 3, 83. DOI: 10.2788/48830.
Djomo AN, Chimi CD. 2017. Tree allometric equations for estimation of above, below, and total biomass in a tropical moist forest: Case study with application to remote sensing. Forest Ecology and Management 391, 184–193. DOI: 10.1016/j.foreco.2017.02.022.
Doucet JL. 2003. L’alliance délicate de la gestion forestière et de la biodiversité dans les forêts du centre du Gabon. Thèse de doctorat. Faculté universitaire des sciences agronomiques de Gembloux, Communauté française en Belgique, 390.
Duveiller G, Defourny P, Desclée B, Mayaux P. 2008. Deforestation in Central Africa: Estimates at regional, national, and landscape levels by advanced processing of systematically-distributed Landsat extracts. Remote Sensing and Environment 112(5), 1969–1981.
Fongnzossie FE, Tsabang N, Nkongmeneck BA, Nguenang GM, Auzel P, Christina E, Kamou E, Balouma JM, Apalo P, Mathieu H, Valbuena M, Valère M. 2008. Les peuplements d’arbres du sanctuaire à gorilles de Mengamé au sud Cameroun. Journal of Tropical Conservation Science 1(3), 204–221.
Fongnzossie FE. 2011. Structure, composition, and floristic diversity of the Kom Gorilla National Park complex of Mengame in South Cameroon. Doctorate thesis, University of Yaoundé I, 221.
Fonkwo NS, Angwafor TE, Mbida M. 2011. Abundance and distribution of large mammals in the Bakossi landscape area, Cameroon. Journal of Soil Science and Environmental Management 2(2), 43–48.
Fredericksen TS, Mostacedo B. 2000. Regeneration of timber species following selection logging in a Bolivian tropical dry forest. Forest Ecology and Management 131, 47–55. https://doi.org/10.1016/S0378-1127(99)00199-1.
Gonmadje CF, Doumenge C, McKey D, Tchouto MGP, Sunderland TCH, Balinga MPB, Sonké B. 2011. Tree diversity and conservation value of the Ngovayang Massif, Cameroon. Biodiversity and Conservation 20, 2627–2648.
Hakizimana P, Bangirinama F, Habonimana B, Bogaert J. 2011. Comparative analysis of the flora of the dense forest of Kigwena and the clear forest of Rumonge in Burundi. Scientific Bulletin of the National Institute for Environment and the Conservation of Nature 9, 53–61.
Herrmann HW, Bohme W, Euskirchen O, Hermann PA, Schmitz A. 2005. African biodiversity hotspots: The reptiles of Mount Nlonako, Cameroon. Revue Suisse de Zoologie, 1045–1069. https://doi:10.1016/j.biocon.2004.05.025.
Hill JL, Hill RA. 2001. Pourquoi les forêts tropicales humides sont-elles si riches en espèces ? Classification, examen et évaluation des théories. Progrès en Géographie Physique 25, 326–354. https://doi.org/10.1191/030913301680193805.
Kamga YB, Nguetsop VF, Anoumaa M, Kanmegne G, Momo SMC, Ngueguim JR. 2019. Garcinia kola (Guttiferae) in tropical rain forests: Exploitation, income generation, and traditional uses in the East and Central Regions of Cameroon. Journal of Pharmaceutical, Chemical and Biological Sciences 7(1), 13–27.
Kamga YB, Nguetsop VF, Momo SMC. 2018. Diversité floristique des ligneux et structure des formations à Garcinia kola Heckel dans les régions du Centre et de l’Est, Cameroun. European Scientific Journal 14(21), 7857–7881. https://doi.org/10.19044/esj.2018.v14n21p451.
Kamga YB. 2014. L’étude de la végétation et gestion des peuplements de Gnidia glauca dans la localité du Mont Oku (Nord-Ouest Cameroun). Mémoire de Master en Biologie Végétale, Université de Dschang, 186.
Kassi NJ, Emma AK, Assi MST. 2010. Plant biodiversity and speed of regeneration of the classified forest of Sonaimbo (Ivory Coast). Journal of Sciences and Nature 7(2), 195–206. DOI: 10.4314/scinat.v7i2.59963.
Kémeuzé VA, Momo SMC, Nkongmeneck B, Decocq G, Jiofack T, Johnson M. 2009. Variation altitudinale de la distribution des plantes à activité insecticide dans la forêt communautaire de Kilum-Ijim: Cas de Clausena anisata. Bois et Forêt des Tropiques 299, 75–76.
Kengne OC, Zapfack L, Garcia C, Noiha NV, Nkongmeneck BA. 2018. Diversité floristique et structurale de deux forêts communautaires sous exploitation au Cameroun: Cas de Kompia et Nkolenyeng. European Scientific Journal 14(24), 245.
Kenne TL, Momo SMC, Tanougong DA, Etchike DAB, Monthe SR, Tchokomeni A. 2023. Analysis of the dynamics of vegetation cover and land use in forest management unit 00-0004 and its surroundings on the coast of Cameroon. Anuário do Instituto de Geociências 46, 56870. https://doi.org/10.11137/1982-3908-2023-46-56870.
Kent M, Coker P. 2003. Vegetation description and analysis: A practical approach. John Wiley & Sons, UK, 354.
Kimpouni V, Apani E, Motom M. 2013. Analyse phytoécologique de la flore ligneuse de la Haute Sangha (République du Congo). Adansonia 3, 35(1), 107–134.
Letouzey R. 1982. Manuel de botanique forestière Afrique tropicale. Tome I, Botanique générale. Centre Technique Forestier Tropical, Nogent s/Marne, 648.
Manfothang EM, Tumenta P, Tassiamba SN, Nguimdo VR, Defouh KY. 2022. Floristic diversity and stand structure of the Ngambe-Ndom-Nyanon Communal Forest, Littoral Region of Cameroon. Open Journal of Forestry 12(4), 503–520. DOI: 10.4236/ojf.2022.124028.
Mbaiyetom H, Avana TML, Tchamba NM, Wouokoue TJB. 2021. Diversité floristique et structure de la végétation ligneuse des parcs arborés de la zone soudanienne du Tchad. International Journal of Biological and Chemical Sciences 15(1), 68–80.
Megevand C. 2013. Deforestation trends in the Congo Basin: Reconciling economic growth and forest protection. World Bank Publications, 201. http://www.worldbank.org/en/news/press-release/2013/05/14/.
Melingui NBJ, Angoni H, Pial AC. 2017. Évaluation de la richesse floristique dans trois types d’utilisation des terres forestières de la concession certifiée Pallisco et partenaires au Cameroun. International Journal 4(2), 225–236.
Melom S, Mbayngone E, Bechir AB, Ratnan N, Mapongmetsem PM. 2015. Floristic and ecological characteristics of plant formations in Messenya, Tchad (Central Africa). Journal of Animal and Plant Sciences 25(1), 3799–3813. http://www.m.elewa.org/JAPS; ISSN 2071-7024.
MINFOF. 2014. Bases de données du Système Informatique de Gestion d’Informations Forestières. SIGIF, Cameroun, 283.
Mingang LD, Ngueguim RJ, Momo SMC, Tchongouang A, Tientcheu TAL. 2022. Quantifying forest loss in the Mbalmayo Forest Reserve (Center Region, Cameroon). Journal of Geoscience and Environment Protection 10, 271–288. https://doi.org/10.4236/gep.2022.109016.
Momo SMC, Mingang DL, Ngueguim JR, KYP Christian. 2023. Diversity and floristic composition of woody plants in the Mbalmayo Forest Reserve (Centre, Cameroon). Journal of Biodiversity and Environmental Sciences (JBES) 22(5), 104–117. http://www.innspub.net.
Momo SMC, Njouonkou AL, Temgoua LF, Zangmene RD, Taffo JBW, Ntoupka M. 2018. Land-use/land-cover change and anthropogenic causes around Koupa Matapit Gallery Forest, West-Cameroon. Journal of Geology and Geography 10(2), 10.
Momo SMC, Temgoua LF, Fedoung E, Zangmene DR. 2018. Végétation et spectres fonctionnels de la galerie forestière de Koupa Matapit (Ouest-Cameroun). International Journal of Tropical Ecology and Geography 42(1), 147–158.
Momo SMC. 2009. Influence des activités anthropiques sur la végétation du Mont Oku (Cameroun). Thèse de Doctorat, Université de Yaoundé I, 197.
Nabe-Nielsen J, Severiche W, Fredericksen T, Nabe-Nielsen LI. 2007. Timber tree regeneration along abandoned logging roads in a tropical Bolivian forest. New Forests 34, 31–40.
Ndobe SN, Mantzel K. 2014. Déforestation et REDD dans le Parc National de Takamanda au Cameroun. 47. https://WWW.forestpeople.org.
Ngnignindiwou MJ, Taffo WJB, Nguetsop VF. 2021. Woody species diversity and ecological characteristics of the Mawouon Forest, in the Western Highlands of Cameroon. Cameroon Journal of Experimental Biology 15(1), 28–34. https://dx.doi.org/10.4314/cajeb.v15i1.5.
Ngomin A, Mvongo NMN. 2015. Sylviculture de 2ème génération au Cameroun: Bases conceptuelles, leviers et schéma d’opérationnalisation. MINFOF-GIZ, Yaoundé, Cameroun, 86.
Ngueguim JR, Momo SMC, Betti JL. 2018. Floristic and structural traits of tree vegetation in three sites with different levels of disturbance in dense humid forest of Cameroon. Journal of Ecology and the Natural Environment 10(9), 239–249.
Ngueguim JR. 2013. Productivité et diversité floristique des ligneux en forêts denses d’Afrique tropicale humide au Cameroun: Site de Mangombe, Bidou et Campo. Thèse de Doctorat, Muséum d’Histoire Naturelle, 213.
Nguimdo V. 2017. Dynamique de la déforestation, de la dégradation et des stocks de carbone dans la forêt d’Enseignement et de Recherche de l’Université de Dschang à Bélabo, Est-Cameroun. Mémoire d’Ingénieur de Conception des Eaux, Forêts et Chasses, Université de Dschang, 79.
Onana JM. 2019. The vascular plants of Cameroon: A taxonomic checklist with IUCN assessments. Flora of Cameroon, IRAD-National Herbarium of Cameroon, Yaoundé, 195.
Ouédraogo A, Thiombiano A, Hahn HK, Guinko S. 2005. Structure du peuplement juvénile et potentialités de régénération des ligneux dans l’Est du Burkina Faso. Études sur la flore et la végétation du Burkina Faso et des pays avoisinants 10, 17–24.
Pielou CE. 1975. Diversité écologique. John Wiley et Fils, New York, 165.
Puig H. 2001. La forêt tropicale humide. Éditions Belin, Paris, France, 448.
Raunkier C. 1934. The life forms of plants and statistical plant geography. Oxford University Press, Oxford, 632.
Romijin E, Lantican CB, Herold M, Lindquist E, Ochieng R, Wijaya A, Murdiyarso D, Verchot LV. 2015. Assessing change in national forest monitoring capacities of 99 tropical countries. Journal of Forest Ecology and Management 352, 109–123.
Sainge MN, Lyonga NM, Jailuhge B. 2018. Floristic diversity across the Cameroon Mountains: The case of Bakossi National Park and Mt. Nlonako. Technical Report to the Rufford Small Grant Foundation UK by Tropical Plant Exploration Group (TroPEG) Cameroon, 96.
Sainge MN. 2018. Vegetation patterns in tropical forests of the Rumpi Hills and Kimbi Fungom National Park, Cameroon, West–Central Africa. Doctor of Philosophy Thesis, Cape Peninsula University of Technology, 237.
Senterre B. 2005. Recherches méthodologiques pour la typologie de la végétation et la phytogéographie des forêts denses d’Afrique Tropicale. Thèse de Doctorat, Université Libre de Bruxelles, 478 plus annexes.
Shannon CE, Weaver W. 1949. The mathematical theory of communication. Urbana, IL: University of Illinois Press, 177.
Siraj M, Zhang K. 2018. Structure and natural regeneration of woody species at central highlands of Ethiopia. Journal of Ecology and the Natural Environment 10(7), 147–158.
Sonké B, Couvreur TLP. 2014. Tree diversity of the Dja faunal reserve, Southeastern Cameroon. Biodiversity Data Journal 2, e1049. https://doi.org/10.3897/BDJ.2.e1049.
Sonké B. 2005. Forêts de la Réserve du Dja (Cameroun): Études floristiques et structurales. Scripta Botanica Belgica 32, 144.
Souza LAS, Eisenlohr PV. 2020. Drivers of floristic variation in biogeographic transitions: Insights from the ecotone between the largest biogeographic domains of South America. Acta Botanica Brasilica 34, 155–166. https://doi.org/10.1590/0102-33062019abb0057.
Sunderland TCH, Walters G, Issembe Y. 2004. A preliminary vegetation assessment of the Mbé National Park, Mount Cristal, Gabon. CARPE Report, 51. http://carpe.umd.edu/resources/Documents/.
Tajeukem VC, Fongnzossie FE, Kemeuze VA, Nkongmeneck BA. 2014. Vegetation structure and species composition at the northern periphery of the Boumba-Bek National Park, Southeastern Cameroon. African Study Monographs 49, 13–46.
Tchaleu D, Momo S, Kambale M, Tafen N, Kamga Y, Nguetsop V. 2024. Floristic diversity, stand structure, and plant life traits in the forest-savanna mosaic at Ndjole (Centre Cameroon). Open Journal of Ecology 14, 309–330. https://doi.org/10.4236/oje.2024.144019.
Tchatchou B, Sonwa DJ, Ifo S, Tiani AM. 2015. Deforestation and forest degradation in the Congo Basin: State of knowledge, current causes and perspectives. Occasional Paper, 144, CIFOR, Bogor, Indonesia.
Tchiengue B. 2004. Floristic and ecological study of the vegetation of a line massif in Cameroon: Mount Kupe. Third cycle Doctorate thesis, University of Yaoundé I, 238.
Tchuikoua LB, Banaga H. 2016. Contribution des organisations paysannes dans la production des cultures vivrières dans l’arrondissement de Ntui. Revue Canadienne de Géographie Tropicale 3, 53–65.
Temgoua LF, Meyabeme EAL, Younchahou MN, Ngouh A, Nzuta CK. 2021. Land use and land cover dynamics in the Melap Forest Reserve, West Cameroon: Implications for sustainable management. Geology, Ecology, and Landscapes 6(4), 305–315. https://doi.org/10.1080/24749508.2021.1923269.
Tiokeng B, Ngougni ML, Nguetsop VF, Solefack MMC, Zapfack L. 2020. Les forêts sacrées dans les Hautes Terres de l’Ouest-Cameroun : Intérêt dans la conservation de la biodiversité. European Scientific Journal 16(36), 234–256.
Tiokeng B, Nguetsop VF, Mapongmetsem PM, Tacham NW, Nnomo DR. 2019. Mid and submontane altitude forests communities on the west hillside of Mount Bambouto (Cameroon): Floristic originality and comparisons. Asian Journal of Research in Botany 2(2), 1–15.
Tiokeng B, Nguetsop VF, Mapongmetsem PM, Tacham WN. 2015. Biodiversité floristique et régénération naturelle sur les Hautes Terres de Lebialem (Ouest Cameroun). International Journal of Biological and Chemical Sciences 9, 56–68. https://doi.org/10.4314/ijbcs.v9i1.6.
Tiokeng B. 2009. Diversité, structure, utilisations et mode local de conservation de quelques forêts sacrées dans les Hautes Terres de l’Ouest du Cameroun. Thèse de Master, Université de Dschang, 122.
Tsewoue MR, Tchamba M, Avana ML, Tanougong AD. 2020. Spatio-temporal dynamics of land use change in the Moungo Division, Littoral Region, Cameroon: Influence on the expansion of banana-based agroforestry systems. International Journal of Biological and Chemical Sciences 15, 486–500. https://doi.org/10.4314/ijbcs.v14i2.
Watson JEM, Dudley N, Segan DB, Hockings M. 2014. The performance and potential of protected areas. Nature 515(7525), 67–73.
Xiao-Tao L, Jian-Wei T. 2010. Structure and composition of the understory treelets in a non-dipterocarp forest of tropical Asia. Forest Ecology and Management 260, 565–578.
Zapfack L. 2005. Impact de l’agriculture itinérante sur brûlis sur la biodiversité et la séquestration du carbone. Thèse de Doctorat ès Science, Option: Écologie Végétale, Université de Yaoundé I, 238.
Zekeng JC, Sebego R, Mphinyane WN, Mpalo M, Nayak D, Fobane JL, Onana JM, Funwi FP, Abada MMM. 2019. Land use and land cover changes in Doume Communal Forest in eastern Cameroon: Implications for conservation and sustainable management. Modelling Earth Systems and Environment 14.
Zhigila DA, Ajiya BC, Sawa FBJ, Abdul SD, Chidibere C. 2016. Plant species diversity, abundance, and distribution in communities of Zamfara State, Nigeria: Implications for conservation. Joint Biodiversity Conference, Unilorin, 92–98.
Franck Mathaus Douandji Douandji, Borel Yanick Kamga, Lacatus Tene Kenne, Victor François Nguetsop (2025), Floristic diversity, stand structure and plant life traits of Mount Nlonako forest (Littoral, Cameroon); JBES, V26, N2, February, P81-101
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