Phytotherapy and Polycyclic Logging: Implication on Genetic Multiplicity and Diversity of African Mahogany in Tropical Rainforest

  • Amadu LAWAL Federal University of Technology Akure, School of Agriculture and Agricultural Technology, Department of Forestry and Wood Technology, Ondo State
  • Victor A. J. ADEKUNLE Federal University of Technology Akure, School of Agriculture and Agricultural Technology, Department of Forestry and Wood Technology, Ondo State
  • Oghenekome U. ONOKPISE Florida Agricultural and Mechanical University (FAMU), College of Agriculture and Food Sciences (CAFS), Forestry and Natural Resources Conservation, Tallahassee Florida
Keywords: poor regeneration, species extinction, unsustainable harvesting


There are over 8,000 globally threatened tree species. For each species, there is a different story behind why they are threatened and what values we stand to lose if we do not find the means to save them. Mahogany, a member of Meliaceae, is a small genus with six species. Its straight, fine and even grain, consistency in density and hardness makes it a high valued wood for construction purposes. The bitter bark is widely used in traditional medicine in Africa. The high demand for bark has also led to the total stripping of some trees, complete felling of larger trees to get the bark from the entire length of the tree and bark removal from juvenile trees. These species are now threatened with extinction due to selective and polycyclic logging, and also excessive bark removal. The natural regeneration of mahogany is poor, and mahogany shoot borer Hypsipyla robusta (Moore) attacks prevent the success of plantations within the native area in West Africa. In developing countries, most of the Khaya species exists in the wild state; therefore, the regeneration and long-term conservation are at the mercy of the vagaries of nature and the profit driven herb collectors and timber merchants. It becomes urgently necessary by government of developing countries to place ban on further harvesting of mahogany species to allow the remaining few trees of mahogany in the forest to recuperate and produce substantial seeds for regeneration.


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Abubaka HT (2010). Many species one planet one future. A keynote address; In: Ofoezie I, Awotoye O, Adewole MB, editors. Proceeding of the 3rd annual conference of the Institute of Ecology and Environmental Studies, OAU, Ile Ife, Nigeria, pp 15-17.

Alamu LO, Agbeja BO (2011). Deforestation and endangered indigenous tree species in South-West Nigeria. International Journal of Biodiversity and Conservation 3(7):291-297.

Andam KS, Ferraro PJ, Pfaff A, Sanchez-Azofeifa GA, Robalino JA (2008). Measuring the effectiveness of protected area networks in reducing deforestation. PNAS 105(42):16089-16094.

Aniah EJ, Okpiliya FI (2003). Paradigms in population, resources and environmental management: a development perspective. pp 71-84.

Arnold JEM, Ruiz Perez M (2001). Can non-timber forest products match tropical forest conservation and development objectives? Ecological Economics 39(3):437-447.

Boateng SK, Adu Y E, Amponsah JY (2007). Collection of edible wild fruits in the forest areas of Volta region of Ghana. Journal of Plant Sciences 2(2):243-246.

Bruijnzeel LA, Critchley WRS (1994). Environmental impacts of logging moist tropical forests. United Nations Educational, Scientific and Cultural Organization (UNESCO).

Bryant D, Nielsen D, Tangley L (1997). The last frontier forests- ecosystems and economies on the edge. World Resource Institute, Washington DC.

Chungu D, Muimba-Kankolongo A, Roux J, Malambo FM (2007). Bark removal for medicinal use predisposes indigenous forest trees to wood degradation in Zambia. Southern Hemisphere Forestry Journal 69(3):157-163.

Diederichs N (2006). Commercialising medical plants: a Southern African guide. Sun Press, Stellenbosch, pp 97-142.

FAO (2005): Global Forest Resources Assessment 2005 - progress towards sustainable forest management. FAO Forestry Paper No. 147, Rome.

FAO (2010). Global Forest Resources Assessment. Main report. FAO Forestry Paper No. 163, Rome.

Ferraro PJ, Pattanayak SK (2006). Money for nothing? A call for empirical evaluation of biodiversity conservation investments. PLoS Biology 4(4):e105.

Geldenhuys CJ, Mitchell D (2006). Sustainable harvesting technologies. In: Diederichs N (ed). Commercialising medicinal plants: a southern African guide. Sun Press, Stellenbosch, pp 23-39.

Goosem SP, Tucker NIJ (1995). Repairing the rainforest - theory and practice of rainforest re-establishment in North Queensland’s wet tropics. Cairns: Wet Tropics Management Authority.

Groombirdge B (1992). Global biodiversity: status of the earth’s living resources. Chapman and Hall London.

Hadi S, Ziegler T, Waltert M, Hodges JK (2009). Tree diversity and forest structure in Northern Siberut, Mentawai Island. Tropical Ecology 50(2):315-327.

Irvine FR (1961). Woody plants of Ghana (with special reference to their uses). Oxford University, London, pp 523-524.

IUCN (2006). IUCN Red List of Threatened Species. IUCN, Gland, Switzerland.

IUCN (2013). IUCN Red List of Threatened Species. Version 2013.2.

Iwu MM (1992). Industrial utilization of medicinal and aromatic plants. Contribution to a symposium on tropical forest medical resources and conservation of biodiversity. NY, pp 24-25.

Jemilat A, Ibrahim Emmanuel AA, Adeola I, Jegede1, Yemisi FK (2006). Comparative studies on Khaya. A. Juss (Meliaceae) in Nigeria. African Journal of Biotechnology 5(11):1154-1160.

Knowles OH, Parrotta J (1995). Amazonian forest restoration: an innovative system for native species selection based on phonological data and performance indices. The Commonwealth Forest Review 74:230-243.

Lamb D, Erskine PD, Parrotta JA (2005). Restoration of degraded tropical forest landscapes. Science 310(5754):1628-1632.

Lawal A, Adekunle VAJ (2013). A silvicultural approach to volume yield, biodiversity and soil fertility restoration of degraded natural forest in South-West Nigeria, International Journal of Biodiversity Science, Ecosystem Services & Management 9(3):201-214.

Malambo FM, Mbunda J, Mitchell D (2005). Indigenous knowledge and best bark harvesting practices: a local community perspective. In: Trees for Health – Forever: Implementing Sustainable Medicinal Bark Use in Southern Africa, SADC Regional Workshop, 1-3 November 2005, Johannesburg, pp 1-5.

Maroyi A (2008). Khaya anthotheca (Welw.) C. DC. (Meliaceae) – an exotic species in Bangladesh. Bangladesh Journal of Plant Taxonomy 19(1):95.

Matt Armstrong DF, Reilly T, Lelievre G, Hopewell A, Redman LF, Robertson RM (2007). African mahogany grown in Australia - wood quality and potential uses. Rural Industries Research and Development Corporation. ISSN 1440-6845.

McLain RJ, Jones ET (2005). Non-timber forest products management on national forests in the United States. Gen. Tech. Rep. PNW-GTR-655. Portland, OR: US Department of Agriculture, Forest Service, Pacific Northwest Research Station, pp 85.

Md. Khairul A, Sukla RB, Syedul A (2012). Khaya anthotheca (welw.) C. DC. (Meliaceae) - An exotic species in Bangladesh. Bangladesh Journal of Plant Taxonomy 19(1):95-97.

Miyawaki A (1999). Creative ecology: restoration of native forests by native trees. Plant Biotechnology 16:15-25.

Ndah RN, Egbe EA, Bechem E, Asaha S, Yengo T, … Ngaiwi EMN (2013). Ethnobotanical study of commonly used medicinal plants of the Takamanda Rainforest South West, Cameroon. African Journal of Plant Science 7(1):21-34.

Newton AC, Baker P, Ramnarine S, Mesen JF, Leakey RRB (1993). The mahogany shoot-borer: prospects for control. Forest Ecology and Management 57(1-2):301-328.

Nikiema A, Pasternak D (2008). Khaya senegalensis (Desr.) A. Juss. In: Louppe D, Oteng-Amoako AA, Brink M (Eds). Plant Resources of Tropical Africa 7:339-344.

Ofori DA, Opuni-Frimpong E, Cobbinah JR (2007). Provenance variation in Khaya species for growth and resistance to shoot borer Hypsipyla robusta. Forest Ecology and Management 242(2-3):438-443.

Okere AU, Adegeye A (2011). In vitro propagation of an endangered medicinal timber species Khaya grandifoliola C. DC. African Journal of Biotechnology 10(17):3335-3339.

Onyekwelu JC, Adekunle VAJ, Adeduntan SA (2005). Does tropical rainforest ecosystem possess the ability to recover from severe degradation? In: Popoola L, Mfon P, Oni PI (Eds). Sustainable forest management in Nigeria: lessons and prospects. Proceeding of the 30th Annual Conference of Forestry Association of Nigeria, Kaduna, Nigeria, pp 145-163.

Oyebo MA (2006). History of forest management in Nigeria from 19th century to date. In: Ayobami TS, editor. Imperatives of space technology for sustainable forest management. Proceedings of an International Stakeholders’ Workshop; 2006 Mar 27 and 28; Abuja: National Space Research and Development Agency, pp 1-14.

Rai NU, Uhl CF (2004). Forest product use, conservation and livelihoods: the case of Uppage fruit harvest in the Western Ghats, India. Conservation Society 2: 289-311.

Sarumi MB, Ladipo DO, Denton L, Olapade EO, Badaru K, Ughasoro C (1996). Nigeria: Country report to the FAO international technical conference on plant genetic resources, pp 108.

Shono K, Davies SJ, Chua YK (2007). Performance of 45 native tree species on degraded lands in Singapore. Journal of Tropical Forest Science 19:25-34.

Syampungani S, Meke G, Geldenhuys CJ (2005). Bark wood responses: results from bark harvesting experiments (Zambia, Malawi and Republic of South Africa). In: Trees for Health - Forever: Implementing Sustainable Medicinal Bark Use in Southern Africa, SADC Regional Workshop, 1-3 November 2005, Johannesburg, pp 9-15.

Ticktin T (2004). The ecological implications of harvesting nontimber forest products. Journal of Applied Ecology 41(1):11-21.

Tripathi PO. Upadhaya K, Tripathi KS, Pandey HN (2010). Diversity, dominance and population structure of tree species along fragment size gradient of subtropical humid forest of Northeast India. Research Journal of Environmental and Earth Sciences 2(2):97-105.

Turner IM (2001). The ecology of trees in the tropical rain forest. Cambridge University Press, Cambridge, pp 298.

Wiselius SI (1998). Khaya A. Juss. In: Sosef MSM, Hong LT, Prawirohatmodjo S (Eds). Plant Resources of South-East Asia 5(3):310-313.

How to Cite
LAWAL, A., ADEKUNLE, V. A. J., & ONOKPISE, O. U. (2019). Phytotherapy and Polycyclic Logging: Implication on Genetic Multiplicity and Diversity of African Mahogany in Tropical Rainforest. NOTULAE SCIENTIA BIOLOGICAE, 11(1), 21-25.
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