01475nas a2200217 4500008004100000245013600041210006900177260001600246490000600262520064600268653002400914653002900938653001700967653001600984100001801000700002301018700002701041700002001068700002401088856014501112 2014 eng d00aTwo new Sabicea (Rubiaceae) species from West Central Africa: Sabicea bullata and Sabicea urniformis. Phytotaxa 173 (4): 285–292.0 aTwo new Sabicea Rubiaceae species from West Central Africa Sabic c2 Jul. 20140 v43 a

Two distinctive new species of Sabicea (Rubiaceae) from the Lower Guinea region are described and illustrated. Sabicea bullata is easily recognized by its cordate leaves, which are strongly bullate above, and its sessile glomerulate inflorescences. It is restricted to the Rumpi Hills and Bakossi Mountains, in southwestern Cameroon. Sabicea urniformis, from southern Gabon and Congo-Brazzaville, is remarkable in having discolorous leaves and an urn-shaped involucre with bracts shortly connate at the base. Detailed descriptions and botanical drawings are provided, conservation status assessed and taxonomic affinities discussed.

10aConservation status10aIUCN Red List Categories10aLower Guinea10aRumpi Hills1 aZemagho, Lise1 aLachenaud, Olivier1 aLiede-Schumann, Sigrid1 aDeissen, Steven1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/two-new-sabicea-rubiaceae-species-west-central-africa-sabicea-bullata-and-sabicea-urniform-001632nas a2200193 4500008004100000245006800041210006700109490000600176520100300182653001101185653001701196653001401213653002301227653002201250653001301272100002401285700002101309856010801330 2014 eng d00aTree diversity of the Dja Faunal Reserve, southeastern Cameroon0 aTree diversity of the Dja Faunal Reserve southeastern Cameroon0 v23 a

The Dja Faunal Reserve located in southeastern Cameroon represents the largest and
best protected rainforest patch in Cameroon. Here we make available a dataset on the
inventory of tree species collected across the Dja. For this study nine 5 km long and 5 m
wide transects were installed. All species with a diameter at breast height greater than 10
cm were recorded, identified and measured. A total of 11546 individuals were recorded,
corresponding to a total of 312 species identified with 60 genera containing unidentified
taxa. Of the 54 identified families Fabaceae, Rubiaceae and Malvaceae were the most
species rich, whereas Fabaceae, Phyllantaceae and Olacaceae were the most abundant.
Finally, Tabernaemontana crassa was the most abundant species across the Reserve. This
dataset provides a unique insight into the tree diversity of the Dja Faunal Reserve and is
now publically available and usable.

10aAfrica10aconservation10adiversity10aDja Faunal Reserve10aspecies inventory10atransect1 aSonké, Bonaventure1 aCouvreur, Thomas uhttps://rubiaceae-africa.myspecies.info/content/tree-diversity-dja-faunal-reserve-southeastern-cameroon02627nas a2200205 4500008004100000245013000041210006900171260001600240490000600256520184500262100001402107700002402121700002002145700002602165700002602191700002202217700001702239700002102256856014402277 2014 eng d00aMixed-Forest Species Establishment in a Monodominant Forest in Central Africa: Implications for Tropical Forest Invasibility.0 aMixedForest Species Establishment in a Monodominant Forest in Ce c20 May 20140 v93 a

Background: Traits of non-dominant mixed-forest tree species and their synergies for successful co-occurrence in
monodominant Gilbertiodendron dewevrei forest have not yet been investigated. Here we compared the tree species
diversity of the monodominant forest with its adjacent mixed forest and then determined which fitness proxies and life
history traits of the mixed-forest tree species were most associated with successful co-existence in the monodominant
forest.
Methodology/Principal Findings: We sampled all trees (diameter in breast height [dbh]$10 cm) within 661 ha
topographically homogenous areas of intact central African forest in SE Cameroon, three independent patches of G.
dewevrei-dominated forest and three adjacent areas (450–800 m apart). Monodominant G. dewevrei forest had lower
sample-controlled species richness, species density and population density than its adjacent mixed forest in terms of stems
with dbh$10 cm. Analysis of a suite of population-level characteristics, such as relative abundance and geographical
distribution, and traits such as wood density, height, diameter at breast height, fruit/seed dispersal mechanism and light
requirement–revealed after controlling for phylogeny, species that co-occur with G. dewevrei tend to have higher
abundance in adjacent mixed forest, higher wood density and a lower light requirement.
Conclusions/Significance: Our results suggest that certain traits (wood density and light requirement) and population-level
characteristics (relative abundance) may increase the invasibility of a tree species into a tropical closed-canopy system. Such
knowledge may assist in the pre-emptive identification of invasive tree species.

1 aPeh, KS-H1 aSonké, Bonaventure1 aSéné, Olivier1 aDjuikouo, Marie-Noël1 aNguembou, Charlemagne1 aTaedoumg, Hermann1 aKouob, Serge1 aLewis, Simon, L. uhttps://rubiaceae-africa.myspecies.info/content/mixed-forest-species-establishment-monodominant-forest-central-africa-implications-tropical02775nas a2200181 4500008004100000245011500041210006900156260001700225490000600242520207600248100002202324700002102346700002102367700002102388700001902409700002402428856014102452 2014 eng d00aCharacterizing the Phylogenetic Tree Community Structure of a Protected Tropical Rain Forest Area in Cameroon.0 aCharacterizing the Phylogenetic Tree Community Structure of a Pr c17 June 20140 v93 a

Tropical rain forests, the richest terrestrial ecosystems in biodiversity on Earth are highly threatened by global changes. This
paper aims to infer the mechanisms governing species tree assemblages by characterizing the phylogenetic structure of a
tropical rain forest in a protected area of the Congo Basin, the Dja Faunal Reserve (Cameroon). We re-analyzed a dataset of
11538 individuals belonging to 372 taxa found along nine transects spanning five habitat types. We generated a dated
phylogenetic tree including all sampled taxa to partition the phylogenetic diversity of the nine transects into alpha and beta
components at the level of the transects and of the habitat types. The variation in phylogenetic composition among
transects did not deviate from a random pattern at the scale of the Dja Faunal Reserve, probably due to a common history
and weak environmental variation across the park. This lack of phylogenetic structure combined with an isolation-bydistance
pattern of taxonomic diversity suggests that neutral dispersal limitation is a major driver of community assembly in
the Dja. To assess any lack of sensitivity to the variation in habitat types, we restricted the analyses of transects to the terra
firme primary forest and found results consistent with those of the whole dataset at the level of the transects. Additionally
to previous analyses, we detected a weak but significant phylogenetic turnover among habitat types, suggesting that
species sort in varying environments, even though it is not predominating on the overall phylogenetic structure. Finer
analyses of clades indicated a signal of clustering for species from the Annonaceae family, while species from the
Apocynaceae family indicated overdispersion. These results can contribute to the conservation of the park by improving our
understanding of the processes dictating community assembly in these hyperdiverse but threatened regions of the world.

1 aManel, Stéphanie1 aCouvreur, Thomas1 aMunoz, François1 aCouteron, Pierre1 aHardy, Olivier1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/characterizing-phylogenetic-tree-community-structure-protected-tropical-rain-forest-area