Cameroon, Forest stratum, Semi-deciduous forest, Understory trees, Vertical variation, Wood density.
 D. F. Whigham, "Ecology of woodland herbs in temperate deciduous forests," Annual Review of Ecology, Evolution, and Systematics, vol. 35, pp. 583-621, 2004.Available at: https://doi.org/10.1146/annurev.ecolsys.35.021103.105708.
 P. Addo-Fordjour, S. Obeng, A. Anning, and M. Addo, "Floristic composition, structure and natural regeneration in a moist semi-deciduous forest following anthropogenic disturbances and plant invasion," International Journal of Biodiversity and Conservation, vol. 1, pp. 21-37, 2009.
 G. M. Nguenang, B. A. Nkongmeneck, J. F. Gillet, C. Vermeulen, J. Dupain, and J. L. Doucet, "Current state of secondarisation of the forest on the northern outskirts of the Dja Biosphere Reserve (South-East Cameroon): influences of past anthropogenic factors and elephants," International Journal of Biological and Chemical Sciences, vol. 4, pp. 1766-1781, 2010.Available at: https://doi.org/10.4314/ijbcs.v4i5.65539.
 P. Hakizimana, F. Bangirinama, F. Havyarimana, B. Habonimana, and J. Bogaert, "Analysis of the effect of the spatial structure of trees on the natural regeneration of the clear forest of Rumonge in Burundi," Scientific Bulletin of the National Institute for the Environment and Nature Conservation, vol. 9, pp. 46-52, 2011.
 K. B. Louis-Paul-Roger, Z. Louis, W. R. Bertrand, N. J. Mancho, C. D. Cedric, N. M. Chichi, M. T. Nadège, E. D. Marie, S. P. J. Marc, and R. Jiagho, "Characterization and conservation status of evergreen rainforest understory: case of Campo Ma'an National Park (Cameroon)," Journal of Plant Sciences, vol. 6, pp. 107-116, 2018.
 M. Tchouto, M. Yemefack, W. De Boer, J. De Wilde, L. Van Der Maesen, and A. Cleef, "Biodiversity hotspots and conservation priorities in the Campo-Ma’an rain forests, Cameroon," Biodiversity & Conservation, vol. 15, pp. 1219-1252, 2006.Available at: https://doi.org/10.1007/s10531-005-0768-6.
 J.-F. Bastin, A. Fayolle, Y. Tarelkin, J. Van den Bulcke, T. De Haulleville, F. Mortier, H. Beeckman, J. Van Acker, A. Serckx, and J. Bogaert, "Wood specific gravity variations and biomass of central African tree species: The simple choice of the outer wood," PloS One, vol. 10, p. e0142146, 2015.Available at: https://doi.org/10.1371/journal.pone.0142146.
 W. Hubau, T. De Mil, J. Van den Bulcke, O. L. Phillips, B. A. Ilondea, J. Van Acker, M. J. Sullivan, L. Nsenga, B. Toirambe, and C. Couralet, "The persistence of carbon in the African forest understory," Nature Plants, vol. 5, pp. 133-140, 2019.
 D. Chimi, L. Zapfack, and N. Djomo, "Diversity, structure and biomass (above and below) in a semi-deciduous moist forest of East Region of Cameroon," Journal of Biodiversity and Environment Sciences, vol. 12, pp. 60-72, 2018.
 M. Henry, A. Besnard, W. Asante, J. Eshun, S. Adu-Bredu, R. Valentini, M. Bernoux, and L. Saint-André, "Wood density, phytomass variations within and among trees, and allometric equations in a tropical rainforest of Africa," Forest Ecology and Management, vol. 260, pp. 1375-1388, 2010.Available at: https://doi.org/10.1016/j.foreco.2010.07.040.
 J. Chave, C. Andalo, S. Brown, M. A. Cairns, J. Q. Chambers, D. Eamus, H. Fölster, F. Fromard, N. Higuchi, and T. Kira, "Tree allometry and improved estimation of carbon stocks and balance in tropical forests," Oecologia, vol. 145, pp. 87-99, 2005.Available at: https://doi.org/10.1007/s00442-005-0100-x.
 P. M. Fearnside, "Wood density for estimating forest biomass in Brazilian Amazonia," Forest Ecology and Management, vol. 90, pp. 59-87, 1997.Available at: https://doi.org/10.1016/s0378-1127(96)03840-6.
 E. M. Nogueira, B. W. Nelson, and P. M. Fearnside, "Wood density in dense forest in central Amazonia, Brazil," Forest Ecology and Management, vol. 208, pp. 261-286, 2005.Available at: https://doi.org/10.1016/j.foreco.2004.12.007.
 A. N. Djomo, G. Ngoukwa, L. Zapfack, and C. D. Chimi, "Variation of wood density in tropical rainforest trees," Journal of Forests, vol. 4, pp. 16-26, 2017.Available at: https://doi.org/10.18488/journal.101.2017.42.16.26.
 F. De Castro, G. B. Williamson, and R. M. de Jesus, "Radial variation in the wood specific gravity of Joannesia princeps: The roles of age and diameter," Biotropica, vol. 25, pp. 176-182, 1993.Available at: https://doi.org/10.2307/2389181.
 T. Le, B. Sagang, T. S. Momo, B. M. Libalah, V. Rossi, N. Fonton, G. Mofack, G. N. Kamdem, F. V. Nguetsop, B. Sonké, and P. Ploton, "Using volume-weighted average wood specific gravity of trees reduces bias in aboveground biomass predictions from forest volume data," Forest Ecology and Management, vol. 424, pp. 519–528, 2018.
 A. E. Zanne, G. Lopez-Gonzalez, D. A. Coomes, J. Ilic, S. Jansen, S. L. Lewis, R. B. Miller, N. G. Swenson, M. C. Wiemann, and J. Chave, "Global wood density database. Retrieved from: http://hdl.handle.net/10255/dryad.235, " 2009.
 C. Maréchal, V. Cawoy, C. Cocquy, G. Dauby, S. Dessein, D. I. Hamilton, J. Dupain, E. Fischer, D. F. Obang, and Q. Groom, Conservation and management of biodiversity. In : De C. Wasseige, J. Flynn, D. Louppe, H.F. Hiol, P. Mayaux (Eds.), State of forests 2013. Belgique: OFAC, 2013.
 A. Fayolle, A. Ngomanda, M. Mbasi, N. Barbier, Y. Bocko, F. Boyemba, P. Couteron, N. Fonton, N. Kamdem, and J. Katembo, "A regional allometry for the Congo basin forests based on the largest ever destructive sampling," Forest Ecology and Management, vol. 430, pp. 228-240, 2018.Available at: https://doi.org/10.1016/j.foreco.2018.07.030.
 A. Ibrahima, P. Schmidt, P. Ketner, and G. J. M. Mohren, Phytomass and nutrient cycling in the dense humid tropical forest of Southern Cameroon. Tropenbos-Cameroon Documents 9. Cameroon: The Tropenbos Cameroon Program, 2002.
 A. N. Djomo and C. D. Chimi, "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, vol. 391, pp. 184-193, 2017.Available at: https://doi.org/10.1016/j.foreco.2017.02.022.
 A. N. Djomo, A. Ibrahima, J. Saborowski, and G. Gravenhorst, "Allometric equations for biomass estimations in Cameroon and pan moist tropical equations including biomass data from Africa," Forest Ecology and Management, vol. 260, pp. 1873-1885, 2010.Available at: https://doi.org/10.1016/j.foreco.2010.08.034.
 A. Fayolle, J.-L. Doucet, J.-F. Gillet, N. Bourland, and P. Lejeune, "Tree allometry in Central Africa: Testing the validity of pantropical multi-species allometric equations for estimating biomass and carbon stocks," Forest Ecology and Management, vol. 305, pp. 29-37, 2013.Available at: https://doi.org/10.1016/j.foreco.2013.05.036.
 M. Day, C. Baldauf, E. Rutishauser, and T. C. Sunderland, "Relationships between tree species diversity and above-ground biomass in Central African rainforests: Implications for REDD," Environmental Conservation, vol. 41, pp. 64-72, 2014.Available at: https://doi.org/10.1017/s0376892913000295.
 D. W. Woodcock, "Wood specific gravity of trees and forest types in the Southern Peruvian Amazon," Acta Amazonica, vol. 30, pp. 589–599, 2000.Available at: https://doi.org/10.1590/1809-43922000304599.
 H. C. Muller-Landau, "Interspecific and inter-site variation in wood specific gravity of tropical trees," Biotropica, vol. 36, pp. 20-32, 2004.Available at: https://doi.org/10.1111/j.1744-7429.2004.tb00292.x.
 T. Ramananantoandro, M. F. Ramanakoto, G. L. Rajoelison, J. C. Randriamboavonjy, and H. P. Rafidimanantsoa, "Influence of tree species, tree diameter and soil types on wood density and its radial variation in a mid-altitude rainforest in Madagascar," Annals of Forest Science, vol. 73, pp. 1113-1124, 2016.Available at: https://doi.org/10.1007/s13595-016-0576-z.
 N. C. Siliprandi, E. M. Nogueira, J. J. Toledo, P. M. Fearnside, and H. E. M. Nascimento, "Inter-site variation in allometry and wood density of Goupia glabra Aubl. in Amazonia," Brazilian Journal of Biology, vol. 76, pp. 1-9, 2016.Available at: https://doi.org/10.1590/1519-6984.22514.
 Q. Molto, V. Rossi, and L. Blanc, "Error propagation in biomass estimation in tropical forests," Methods in Ecology and Evolution, vol. 4, pp. 175-183, 2013.Available at: https://doi.org/10.1111/j.2041-210x.2012.00266.x.
 T. R. Baker, O. L. Phillips, Y. Malhi, S. Almeida, L. Arroyo, A. Di Fiore, T. Erwin, T. J. Killeen, S. G. Laurance, and W. F. Laurance, "Variation in wood density determines spatial patterns in Amazonian forest biomass," Global Change Biology, vol. 10, pp. 545-562, 2004.Available at: https://doi.org/10.1111/j.1365-2486.2004.00751.x.
 J. Chave, D. Coomes, S. Jansen, S. L. Lewis, N. G. Swenson, and A. E. Zanne, "Towards a worldwide wood economics spectrum," Ecology Letters, vol. 12, pp. 351-366, 2009.Available at: https://doi.org/10.1111/j.1461-0248.2009.01285.x.
 D. Woodcock and A. Shier, "Does canopy position affect wood specific gravity in temperate forest trees?," Annals of Botany, vol. 91, pp. 529-537, 2003.Available at: https://doi.org/10.1093/aob/mcg054.