The genus Cola (Malvaceae) in Cameroon’s Korup National Park, with two novelties
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Keywords

Cameroon
Cola
conservation status
Korup National Park
Malvaceae-Sterculiodeae

How to Cite

Kenfack, D., Sainge, M., Chuyong, G. and Thomas, D. (2018) “The genus Cola (Malvaceae) in Cameroon’s Korup National Park, with two novelties”, Plant Ecology and Evolution, 151(2), pp. 241-251. doi: 10.5091/plecevo.2018.1410.

Abstract

Background and aimsCola, the second largest genus of the Malvaceae-Sterculioideae comprises 100–135 small to large tree species confined in nature to African forests, though cultivated elsewhere. Current species distribution ranges show that the genus is highly diverse in the seasonally wet forests along the Nigeria-Cameroon border, including the Korup National Park (KNP). In this paper we examine the diversity and abundance of Cola in KNP compared to other forests for which comparable data are available. We also describe two novelties in the genus.
Methods – We used inventory data from a 50-ha permanent plot in southern KNP where all Cola trees and saplings down to 1 cm in diameter were tagged, mapped and identified. Additional collections of the genus came from the 11 km trail leading to the plot. Classic herbarium techniques and field observations were used for the morphological identification and description of specimens at MO and YA and from our personal collections. Cola species richness and abundance was estimated from the plot data and compared to other African forest sites for which comparable data are available. The evaluation of the conservation status of the two new species described in this paper followed the IUCN Red List Categories and Criteria.
Key results – Twenty-five species of Cola were identified in the southern part of the KNP, including four undescribed species, raising the total number of Cola species in Cameroon to 46. The abundance of the genus in KNP was three orders of magnitude higher than in the Rabi forest in southwestern Gabon or in the Ituri forest in eastern D.R. Congo. This high species richness and abundance suggests that KNP is part of the center of diversity of the genus. Two new species, Cola zemagoana Kenfack & D.W.Thomas and C. mamboana Kenfack & Sainge are described and illustrated. Both species are only known from the lowland rainforest of southwestern Cameroon. Cola zemagoana is narrow endemic of southern KNP and its conservation status is assessed as Endangered. Cola mamboana is confined to the lowland forests of southwestern Cameroon, is locally very abundant in protected areas and is also assigned the conservation status Endangered.

https://doi.org/10.5091/plecevo.2018.1410
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References

Bachman S., Moat J., Hill A.W., de la Torre J., Scott B. (2011) Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. ZooKeys 150: 117–126. https://doi.org/10.3897/zookeys.150.2109

Barthlott W., Lauer W., Placke A. (1996) Global distribution of species diversity in vascular plants: towards a world map of phytodiversity. Erkunde 50: 317–327. https://doi.org/10.3112/erdkunde.1996.04.03

Breteler F.J. (2014a) Novitates Gabonenses 83. Two new species of Cola (Sterculiaceae s. str.) from Gabon with an introductory note on the subdivision of the genus. Plant Ecology and Evolution 147: 101–107. https://doi.org/10.5091/plecevo.2014.794

Breteler F.J. (2014b) Novitates Gabonenses 81. The identity and geography of Cola cauliflora Mast. (Malvaceae formerly Sterculiaceae) and its substitute for Gabon and the Republic of the Congo. Adansonia 36: 113–119. https://doi.org/10.5252/a2014n1a10

Brown J.H. (1984) On the relationship between abundance and distribution of species. The American Naturalist 124: 255–279. https://doi.org/10.1086/284267

Cheek M., Onana J.-M., Pollard B.J. (2000) The plants of Mount Oku and the Ijim Ridge, Cameroon: a conservation checklist. Kew, Royal Botanic Gardens Kew.

Cheek M. (2002) Three new species of Cola (Sterculiaceae) from western Cameroon. Kew Bulletin 57: 403–415. https://doi.org/10.2307/4111117

Cheek M., Pollard B.J., Darbyshire I., Onana J.-M. (2004) Plants of Kupe, Mwanenguba and the Bakossi Mountains, Cameroon: a conservation checklist. Kew, Royal Botanic Gardens Kew.

Chuyong G.B., Kenfack D., Harms K.E., Thomas D.W., Condit R., Comita L.S. (2011) Habitat specificity and diversity of tree species in an African wet tropical forest. Plant Ecology 212: 1363–1374. https://doi.org/10.1007/s11258-011-9912-4

Chuyong G.B., Condit R., Kenfack D., Losos E., Sainge S.M., Songwe N.C., Thomas D.W. (2004) Korup Forest Dynamics Plot, Cameroon. In: Losos E.C., Leigh Jr E.G. (eds) Forest diversity and dynamism: findings from a large-scale plot network: 506–516. Chicago, The University of Chicago Press.

Cheek M., Dorr L. (2007) Sterculiaceae. In: Beentje H.J., Ghazanfar S.A. (eds) Flora of Tropical East Africa. Kew, Royal Botanic Gardens, Kew.

Ewango C.E.N., Kenfack D., Sainge M.N., Thomas D.W., van der Burgt X.M. (2016) Gambeya korupensis (Sapotaceae: Chryso­phylloideae), a new rain forest tree species from the Southwest Region in Cameroon. Kew Bulletin 71: 28. https://doi.org/10.1007/s12225-016-9633-x

Germain R. (1963) Sterculiaceae. In: Flore du Congo, du Rwanda et du Burundi. Spermatophytes vol. 10: 277–316. Brussels, Jardin botanique National de Belgique.

Hallé N. (1961) Sterculiaceae. In: Aubréville A. (ed.) Flore du Gabon vol. 2. Paris, Muséum national d’Histoire naturelle.

Hallé N. (1962) Sur les “Cola” et “Chlamydocola” (Stercul.). Remarques, additions et divisions sous-génériques nouvelles. In: Fernandes A. (ed.) Comptes Rendus de la IVe réunion plénière de l’Association pour l’Etude Taxonomique de la Flore d’Afrique Tropicale: 371–380. Lisboa, Junta de Investigações do Ultramar.

IUCN (2012) IUCN Red List Categories and Criteria, version 3.1, Second Edition. Prepared by the IUCN Species Survival Commission. Gland & Cambridge, IUCN.

Kenfack D., Sainge M.N., Thomas D.W. (2006) A new species of Cassipourea (Rhizophoraceae) from Western Cameroon. Novon 16: 61–64. https://doi.org/10.3417/1055-3177(2006)16[61:ANSOCR]2.0.CO;2

Kenfack D., Thomas D.W., Chuyong G., Condit R. (2007) Rarity and abundance in a diverse African forest. Biodiversity and Conservation 16: 2045–2074. https://doi.org/10.1007/s10531-006-9065-2

Linder H.P. (2001) Plant diversity and endemism in sub-Saharan tropical Africa. Journal of Biogeography 28: 169–182. https://doi.org/10.1046/j.1365-2699.2001.00527.x

Litt A., Cheek M. (2002) Korupodendron songweanum, a new genus and species of Vochysiaceae from West-Central Africa. Brittonia 54: 13–17. https://doi.org/10.1663/0007-196X(2002)054[0013:KSANGA]2.0.CO;2

Nkongmeneck B.-A. (1982) Contribution à l’étude du genre Cola au Cameroun. Thesis of 3rd cycle. Université de Yaoundé, Yaoundé, Cameroon.

Nkongmeneck B.-A. (1985) Un nouveau Cola (Sterculiaceae) du Cameroon. Adansonia 7: 337–339.

Sainge N.M. (2016) Patterns of distribution and endemism of plants in the Cameroon Mountains: a case study of Protected Areas in Cameroon: Rumpi Hills Forest Reserve (RHFR) and the Kimbi Fungom National Park (KFNP). Ndian, Tropical Plant Exploration Group (TroPEG) Cameroon.

Thomas D.W., Kenfack D., Chuyong G.B., Moses S.N., Losos E.C., Condit R.S., Songwe N.C. (2003) Tree species of Southwestern Cameroon: tree distribution maps, diameter tables, and species documentation of the 50-hectare Korup Forest Dynamics Plot. Washington DC, Center for Tropical Forest Science of the Smithsonian Tropical Research Institute.

van der Burgt X.M., Eyakwe M., Motoh J. (2012) Gilbertiodendron newberyi (Leguminosae: Caesalpinioideae), a new tree species from Korup National Park, Cameroon. Kew Bulletin 67: 51–57. https://doi.org/10.1007/s12225-012-9345-9

van der Burgt X.M., Poundje M, Sene O. (2014) Cryptosepalum korupense Burgt, sp. nov. (Leguminosae, Caesalpinioideae), a tree species from the Southwest Region in Cameroon. Adansonia 36: 73–81. https://doi.org/10.5252/a2014n1a7

White F. (1979) The Guineo-Congolian Region and its relationships to other phytochoria. Bulletin du Jardin botanique National de Belgique 49: 11–55. https://doi.org/10.2307/3667815

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