Diversite Et Distribution Des Ligneux Dans Le Sud Du Parc National De Taï (Pnt), Côte D\'Ivoire

Adou-Yao, Y; Dengueadhe, K.T.S.; Kouame, D; N’guessan, KE

doi:10.4314/aga.v19i2.1716

Cited by 3 publications

(8 citation statements)

References 7 publications

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“…For more details on the TNP, see Riezebos, Vooren, and Guillaumet () and Adou Yao et al. (). Our study site was situated at the western central edge of TNP (5°50’ N, 7°20’ W) and comprised roughly 30 km 2 of primary and secondary rain forest in the surroundings of the “Station de Recherche en Ecologie Tropical” (SRET; Figure S1).…”

Section: Methodsmentioning

confidence: 99%

Prevalence of endoparasitic mites on four West African leaf‐litter frogs depends on habitat humidity

et al. 2019

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Amphibian species are known to carry endoparasitic mites. The infestation probability, prevalence, and intensity of mites vary among species and habitats. Mites of the genus Endotrombicula are known to infest African and Malagasy frogs. However, the factors leading to an increase in the probability of mite infestation are unknown. To test for inter‐ and intraspecific differences in infestation probability and its potential correlation with sex, age, habitat preferences, and/or season within a species‐rich West African leaf‐litter frog assemblage, we examined more than 6,800 individual frogs for the presence of mites throughout two independent time increments, 1999–2000 and 2016–2017. We found only members of the leaf‐litter frog genus Phyrnobatrachus to be infested, while other syntopically occurring genera were not affected. Within Phrynobatrachus, only four out of eight species were infested. Mites prevalence differed between species (highest P. phyllophilus, followed by P. alleni), sex (males higher than females in P. alleni and P. phyllophilus), and age (adults higher than juveniles in P. alleni), as well as season (more mites during wet than dry season in P. phyllophilus). The prevalence of mite infestation did not influence mate choice in P. alleni. Increased humidity showed a clear positive effect on infestation prevalence. We also detected a marked decrease in the prevalence of mites from 1999–2000 to 2016–2017, a period during which climatological changes within the study area have been reported with a tendency toward drier conditions. The decrease in mite infestation prevalence over time might be a signal of increasingly drier conditions.

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Section: Methodsmentioning

confidence: 99%

Prevalence of endoparasitic mites on four West African leaf‐litter frogs depends on habitat humidity

et al. 2019

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“…These species originate from other tropical areas (America, Asia, Australia, and New Zealand) [such as Artocarpus altilis (Parkinson) Fosberg, Cassia siamea Lam, Cedrela odorata L., Gmelina arborea Roxb., Hevea brasiliensis (Kunth) Mull.arg., Mangifera indica L., Tectona grandis L. f., and Theobroma cacao L.]. Phytogeographic characteristics have been assigned to species in the general list of riparian forests using specialized studies (Adjossou, 2009; Adou et al, 2005; Aké Assi, 1984; Akpagana, 1989; Aubréville, 1959; Berhaut, 1967–1988; Brunel et al, 1984; Guelly, 1994; Hawthorne & Jongkind, 2006; Hutchinson et al, 1954–1972; Kokou, 1998; Lebrun & Stork, 1991–1992; Natta, 2003; Poorter et al, 2004), and the African Plant Distribution Database (https://www.ville-ge.ch/musinfo/bd/cjb/africa/index.php?langue=an).…”

Section: Methodsmentioning

confidence: 99%

“…Second, the floristic list obtained from the riparian forests was compared with floristic lists representative of sites considered as major forest refuges in sub‐Saharan tropical Africa, including the Taï Forest Reserve located between southwest Côte d'Ivoire and Liberia near the large forest refuges of Palmas Cape and the Nimba Mountains; the DG vegetation sensu stricto located between Togo and Benin, part of the large forest refuges between Ghana and Benin; and the Haute Sangha forest (Republic of Congo) located in the large forest refuge areas of southern Cameroon—northern Gabon. For the forest refuges of southwest Côte d'Ivoire, the complete list of vascular flora established by Adou et al (2005) was used. For the DG, the complete lists of vascular flora in the forest islands of the coastal plain of Togo established by Kokou (1998, 1999) and the riparian forests of Benin established by Natta (2003) were used.…”

Section: Methodsmentioning

confidence: 99%

“…( (Adjossou, 2009;Adou et al, 2005;Aké Assi, 1984;Akpagana, 1989;Aubréville, 1959;Berhaut, 1967Berhaut, -1988Brunel et al, 1984;Guelly, 1994;Hawthorne & Jongkind, 2006;Hutchinson et al, 1954Hutchinson et al, -1972Kokou, 1998;Lebrun & Stork, 1991Natta, 2003;Poorter et al, 2004), and the African Plant Distribution Database (https://www.ville -ge.ch/musin fo/bd/cjb/afric a/index.php?langu e=an).…”

Section: Endemism Analysismentioning

confidence: 99%

“…ex Oliv., Pterocarpus mildbraedii Harms, Sterculia rhinopetala K.Schum., Stephania dinklagei (Engl.) Diels, and Trichilia megalanthaHarms, would appear in the forests of southwest Côte d'Ivoire according to the African plant database but notAdou et al, 2005 records. Considering these typically Guinean-Congolese species, the number of shared species would reach 60%.…”

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Floristic composition and turnover analysis in Dahomey Gap and the surrounding sub‐humid Togolese mountain minor forest refuges: Importance for biogeography and biodiversity conservation in sub‐Saharan Africa

Adjossou

Kokou

Deconchat

2022

Ecology and Evolution

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The origin of Dahomey Gap (DG) flora is one of the central biogeographical questions in sub‐Saharan, which has been addressed in several studies. However, floristic evidence based on representative samples from the DG seems to be lacking in the scientific debate. The present study was conducted to fill this gap. Specifically, we assessed Togolese mountain riparian forests as minor forest refugia, examined their contribution to larger sub‐Saharan forest refugia, and discussed the significance of these findings for biogeography and biodiversity conservation. Southwest Togo, West Africa, and sub‐Saharan Upper Guinea Region Floristic data were collected in riparian forests through an intensive botanical inventory ( n = 198; 50 × 10 m 2 ). A comparative analysis was performed based on the floristic evidence related to forest refuges. The results showed significantly high species richness (868 species) and a high gamma and beta diversity associated with spatial turnover patterns. They also showed a high affinity between the study forests and large sub‐Saharan forest refugia. Riparian forests share about 60% of their current species richness with large sub‐Saharan forest refugia and contained refuge bio‐indicator species. The floristic evidence, consistent with those of other studies, suggests that Togolese mountains would have very ancient origins and have experienced paleoclimatic events. The studied riparian would have served as refuges during recurrent climatic episodes. Our results support the minimal forest fragmentation hypothesis (network of refugia along rivers). However, they seem to be incompatible with the idea that the DG flora may be essentially a relic of the early Holocene. In sub‐Saharan Africa, where maintaining a vast area of natural forest is difficult due to human pressure, efforts to preserve maximum species diversity should include a focus on the conservation of minor forest refuges, particularly in sub‐humid mountain riparian zone.

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Distribution, regeneration and conservation status of Nuxia congesta R. Br. ex Fresen. (Buddlejaceae) in Côte d’Ivoire

Yao¹,

N’Da²

2011

AJSIR

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In Côte d'Ivoire, Nuxia congesta (Buddlejaceae) was known only on some highest peaks of the country (Mounts Tonkpi and Boho) until 2006. Recent studies conducted from January to June 2007 and in 2008 identified two new locations in the region of Marahoué (department of Bouaflé), relatively far from the previously known ones and confirmed the disappearance of the species in Mounts Tonkpi and Boho. The distribution of this species was mapped and some ecological characteristics observed in those different locations were specified. The conservation status of the species was also assessed and discussed on the basis of the threats that its habitats were liable to, using the criteria of the IUCN Red List. The species can be characterized as rare in Côte d'Ivoire.

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Diversite Et Distribution Des Ligneux Dans Le Sud Du Parc National De Taï (Pnt), Côte D\'Ivoire

Cited by 3 publications

References 7 publications

Prevalence of endoparasitic mites on four West African leaf‐litter frogs depends on habitat humidity

Prevalence of endoparasitic mites on four West African leaf‐litter frogs depends on habitat humidity

Floristic composition and turnover analysis in Dahomey Gap and the surrounding sub‐humid Togolese mountain minor forest refuges: Importance for biogeography and biodiversity conservation in sub‐Saharan Africa

Distribution, regeneration and conservation status of Nuxia congesta R. Br. ex Fresen. (Buddlejaceae) in Côte d’Ivoire

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