@proceedings {47, title = {Apport des inventaires des Orchidaceae et des Rubiaceae dans l{\textquoteright}identification des Zones d{\textquoteright}Importance pour la COnservation (ZICO) au Cameroun}, year = {2009}, note = {Talk}, month = {27/03/2009}, pages = {31-34}, address = {VUB-ULB, Brussels}, keywords = {Orchids Africa}, author = {Sonk{\'e}, B. and Droissart, V. and Stevart, T.}, editor = {Dahdouh-Guebas, F. and Barbier, N. and Bogaert, J. and Hardy, O. and Koedam, N. and Mahy, G. and Parmentier, I. and Schmitz, N. and Stevart, T. and Triest, L. and Meerts, P.} } @conference {48, title = {A new specimen database for Atlantic Central Africa (1): using Orchidaceae and Rubiaceae to boost conservation assessment process in the sub-region}, booktitle = {XIXth AETFAT Congress}, year = {2010}, note = {Poster}, month = {April 26 - 30, 2010}, publisher = {Scripta Botanica Belgica 46}, organization = {Scripta Botanica Belgica 46}, type = {Poster}, address = {Antananarivo, Madagascar}, abstract = {462}, keywords = {Orchids Africa}, author = {Sonk{\'e}, B. and Droissart, V. and Stevart, T.} } @article {49, title = {A new species of Bertiera Aubl. (Rubiaceae) in subgenus Bertierella discovered in Equatorial Guinea and Cameroon}, journal = {Adansonia}, volume = {27}, number = {2}, year = {2005}, note = {Cited Reference Count: 14 ref.EnglishUne nouvelle espece de Bertiera Aubl. (Rubiaceae) du sous-genre Bertierella decouverte en Guinee Equatoriale et au Cameroun.}, pages = {309-315}, type = {article}, abstract = {

A new species of Bertiera (Rubiaceae) from Equatorial Guinea and Cameroon, Bertiera rosseeliana Sonkd, Esono \& Nguembou, is described and illustrated here. This new species belongs to subgenus Bertierella and appears to be closely related to Bertiera naucleoides. It differs from this species, however, by the features stated in the diagnosis: glabrous leaf blade (not puberulous); calyx lobes shorter (2-3 not 7-8 mm); corolla tube longer (18-20 not 5-6 mm); fruits without pedicel.

}, keywords = {ACP Countries, Africa, Africa South of Sahara, angiosperms, Cameroon, Central Africa, corolla, Developing Countries, dicotyledons, Equatorial Guinea, eukaryotes, Francophone Africa, fruits, Least Developed Countries, new species, petals, plants, Rubiaceae, Rubiales, Spermatophyta, ZZ380Taxonomy and Evolution}, isbn = {1280-8571}, author = {Sonk{\'e}, B. and Esono, P. and Nguembou, K. C. and Stevart, T.} } @article {14, title = {Subsampling Herbarium Collections to Assess Geographic Diversity Gradients: A Case-Study with endemic Orchidaceae and Rubiaceae in Cameroon}, journal = {Biotropica}, volume = {44}, number = {1}, year = {2012}, pages = {44-52}, keywords = {Orchids Africa}, author = {Droissart, V. and Hardy, O. and Sonk{\'e}, B. and Dahdouh-Guebas, F. and Stevart, T.} } @conference {15, title = {Contribution des Orchidaceae et des Rubiaceae end{\'e}miques d{\textquoteright}Afrique centrale atlantique {\`a} l{\textquoteright}{\'e}tude phytog{\'e}ographique du Cameroun}, booktitle = {XVIII{\`e}me congr{\`e}s de l{\textquoteright}AETFAT}, year = {2007}, note = {Talk}, month = {26 February {\textendash} 2 March 2007}, type = {Talk}, address = {Yaound{\'e}, Cameroon}, keywords = {Orchids Africa}, author = {Droissart, V. and Nguembou, C. and Sonk{\'e}, B. and Stevart, T.} } @article {17, title = {Do plant families with contrasting functional traits show similar patterns of endemism? A case study with Central African Orchidaceae and Rubiaceae}, journal = {Biodiversity and Conservation}, volume = {20}, number = {7}, year = {2011}, pages = {1507-1531}, keywords = {Orchids Africa}, author = {Droissart, V. and Sonk{\'e}, B. and Hardy, O. J. and Simo, M. and Taedoumg, H. and Nguembou, K. C. and Stevart, T.} } @conference {27, title = {Distribution des Rubiaceae end{\'e}miques du Cameroun}, booktitle = {Abstract du XVIII{\`e}me congr{\`e}s de l{\textquoteright}AETFAT}, year = {2007}, note = {Poster}, month = {26 February {\textendash} 2 March 2007}, type = {Talk}, address = {Yaound{\'e}, Cameroon}, author = {Nguembou, C. and Droissart, V. and Stevart, T. and Sonk{\'e}, B.} } @article {32, title = {The inselberg flora of Atlantic Central Africa. I. Determinants of species assemblages}, journal = {Journal of Biogeography}, volume = {32}, number = {4}, year = {2005}, note = {Times Cited: 11}, pages = {685-696}, abstract = {

Aims To identify the relative contributions of environmental determinism, dispersal limitation and historical factors in the spatial structure of the floristic data of inselbergs at the local and regional scales, and to test if the extent of species spatial aggregation is related to dispersal abilities. Location Rain forest inselbergs of Equatorial Guinea, northern Gabon and southern Cameroon (western central Africa). Methods We use phytosociological releves and herbarium collections obtained from 27 inselbergs using a stratified sampling scheme considering six plant formations. Data analysis focused on Rubiaceae, Orchidaceae, Melastomataceae, Poaceae, Commelinaceae, Acanthaceae, Begoniaceae and Pteridophytes. Data were investigated using ordination methods (detrended correspondence analysis, DCA; canonical correspondence analysis, CCA), Sorensen\&$\#$39;s coefficient of similarity and spatial autocorrelation statistics. Comparisons were made at the local and regional scales using ordinations of life-form spectra and ordinations of species data. Results At the local scale, the forest-inselberg ecotone is the main gradient structuring the floristic data. At the regional scale, this is still the main gradient in the ordination of life-form spectra, but other factors become predominant in analyses of species assemblages. CCA identified three environmental variables explaining a significant part of the variation in floristic data. Spatial autocorrelation analyses showed that both the flora and the environmental factors are spatially autocorrelated: the similarity of species compositions within plant formations decreasing approximately linearly with the logarithm of the spatial distance. The extent of species distribution was correlated with their a priori dispersal abilities as assessed by their diaspore types. Main conclusions At a local scale, species composition is best explained by a continuous cline of edaphic conditions along the forest-inselberg ecotone, generating a wide array of ecological niches. At a regional scale, these ecological niches are occupied by different species depending on the available local species pool. These subregional species pools probably result from varying environmental conditions, dispersal limitation and the history of past vegetation changes due to climatic fluctuations.

}, keywords = {Orchids Africa}, isbn = {0305-0270}, author = {Parmentier, I. and Stevart, T. and Hardy, O. J.} } @article {10, title = {Vascular plant checklist of the coastal National Park of Pongara, Gabon}, journal = {Systematics and Geography of Plants}, volume = {78}, number = {2}, year = {2008}, month = {2008}, pages = {155-216}, type = {Article}, abstract = {

This first checklist of the vascular plants of Pongara National Park in coastal Gabon comprises 385 taxa. The checklist is based on a botanical inventory carried out in 2006-2007 and on existing collections from the Park. Information on ecology and chorology is given for each species. Ninety-five species were collected in the littoral savannah, half of which belonged to Poaceae, Cyperaceae and Orchidaceae, and 356 species in the littoral forest, mainly Rubiaceae (33), Orchidaceae (15) and Euphorbiaceae (12). The savannah has a much higher percentage of widespread species than the forest. Eighty-three species are endemic to Lower Guinea, nine of which are endemic or near endemic to Gabon.

}, keywords = {07502, Ecology: environmental biology - General and methods, 07506,, 50528, Botany: general and, Africa, Angiospermae, Spermatophyta, Plantae, Angiosperms,, Angiosperms, Dicots, Plants, Spermatophytes, Vascular Plants, Angiosperms, Monocots, Plants,, Angiosperms, Monocots, Plants, Spermatophytes,, Biogeography (Population Studies), Cyperaceae [25280], Ecology: environmental biology - Plant, Ethiopian region, Euphorbiaceae [26055], Gabon, Gramineae [25305], Monocots, Plants, Spermatophytes, Vascular Plants, Monocotyledones, Angiospermae, Spermatophyta, Plantae, Orchidaceae [25375], Rubiaceae [26680], Spermatophyta, Plantae, Spermatophytes, Vascular Plants, systematic - Floristics and distribution, Vascular Plants, [Cyperaceae]/Dicotyledones, Angiospermae, Spermatophyta, Plantae, [Euphorbiaceae]/Monocotyledones, Angiospermae,, [Orchidaceae]/Dicotyledones, Angiospermae, Spermatophyta, Plantae, [Poaceae]/Monocotyledones,, [Rubiaceae]}, isbn = {1374-7886}, author = {Dauby, G. and Leal, M. and Stevart, T.} }