Wild edible plants in the Ehotilé, a fishing people around Aby lagoon (eastern littoral of Côte d'Ivoire): Knowledge and availability

This study is set within the important framework of the imperative need to safeguard traditional knowledge at historical, nutritional levels, and as an element of sustainable management of natural resources. Thus, it aimed to identify, through four ethnobotanical surveys (2007, 2009, 2015 and 2019), the wild edible plants used by the Ehotilé around the Aby Lagoon, on the Ivorian eastern littoral, to evaluate the use, preference and availability related to these plants and to discuss the evolution of food practices since the observations of missionaries three centuries earlier. The level of knowledge was analysed using Smith's Index and the availability of edible fruits was assessed with a new cognitive index. Compared to the era of the first settlement, the diet of the Ehotilé has undergone many modifications. Current observations showed that wild plants were rarely used in the diet which was essentially cassava-based. Thirty-nine edible ethnospecies corresponding to 40 scientific plants species were recorded for 46 uses, of which, wild fruits with 54.17 % were the most important. Edible fruits were available all year round, but irregularly and the availability index suggested that 10 species of the fruits sought were rare in the region. The study has shown that gathering plants are well known by the Ehotilé. However, they are not very present in their diet. In addition, they have a good knowledge of the availability of their edible plants and could therefore be key resource persons in any assessment of the dynamics of plants in their environment

Diversité Floristique Et Valeur De Conservation De La Forêt Classée De N’ganda-N’ganda (Sud-Est De La Cote D’ivoire)

L’étude a été entreprise en vue de contribuer à une meilleure connaissance de la flore de la forêt classée de N’ganda-N’ganda. Pour ce faire, la technique de relevés itinérants a été utilisée. Les inventaires itinérants ont permis d’obtenir une liste de 445 espèces de plantes réparties en 293 genres et 96 familles. Les familles les plus dominantes diffèrent d’un milieu à un autre. Les Rubiaceae sont parmi les familles prépondérantes, quel que soit le type de milieu. Les types biologiques sont dominés par les phanérophytes à plus de 60 %. Le spectre phytogéographique est marqué par une dominance des espèces Guinéo-Congolaises, dans les deux types de forêts. En savane, les hémicryptopytes sont les types biologiques les plus dominants. Le nombre élevé d’espèces endémiques de Haute Guinée (58) et ivoiriennes (09) couplé par la présence de 22 taxons classés de rares, devenus rares et en voie d’extinction pour la flore de la Côte d’Ivoire et de 20 taxons de la liste rouge de l’UICN (2015), représente sa caractéristique particulière. Les traits particuliers de cette flore doivent susciter plus d’attention de la part des gestionnaires de cette forêt. This study focuses on providing a better knowledge of the flora of N'ganda-N'ganda forest. The itinerant survey technique was used, and this made it possible to obtain a list of 445 species which was distributed between 293 genera and 96 families. The most dominant families deffer by space. Rubiaceae was between dominated families and all types of spaces. The biological types are dominated more than 60% by the phanerophyts. Phytogeographic spectrum is marked by a strong dominance of species known as Guineo-Congolese in two types of forest. In Savanah, hemicryptophyts was the most dominated biological types. The high number of endemic species from Upper Guinea (58) and Ivorian (9), coupled with the presence of 22 taxa classified as rare and endangered for the flora of Côte d'Ivoire and 20 taxa of IUCN Red List (2015), represents its special character. Particular traits of this flora should attract more attention from managers of this forest

Caractérisation phytosociologique des anciens sites de traitements sylvicoles et de la réserve naturelle dans le parc national du Banco (Abidjan-Côte d’Ivoire)

La perturbation des milieux est à l’origine de la destruction des habitats, elle contribue à la perte de la biodiversité et est une des causes du changement de la flore dans une localité. Elle entraine par conséquent la transformation des associations végétales. L’objectif principal de cette étude est de rechercher les associations végétales dans le parc national du Banco suite aux plantations villageoises et aux essais  sylvicoles dus à la recherche d’une méthodologie propre à la sylviculture africaine. Pour ce faire, la caractérisation phytosociologique des anciens sites de traitements et de la réserve forestière a été réalisée. La méthode utilisée est celle de la phytosociologie synusiale. Les 91 relevés (82 dans les anciens sites de traitements sylvicoles et 9 dans la réserve forestière) ont permis de recenser  337 espèces de plantes réparties en 65 familles et 268 genres. Le dendrogramme issu de la classification hiérarchique ascendante des relevés a mis en évidence trois syntaxons dont deux sont constitués essentiellement des relevés des anciens sites de traitements et un des relevés de la réserve forestière. Aucun syntaxon ne renferme la totalité des espèces caractéristiques de l’association Turraeantho-Heisterietum. Cependant, dans deux syntaxons, la proportion des espèces caractéristiques de cette association est supérieure à 50%. 70,59% dans le syntaxon à Tarrietia utilis et Cola heterophylla (syntaxon des forêts secondaires), 52,94% dans le syntaxon à Cola chlamydantha et Drypetes chevalieri (syntaxon de la réserve forestière). Alors que dans le syntaxon à Dacryodes klaineana et Pleiocarpa mutica (syntaxon des forêts secondaires), 41% de ces espèces caractéristiques ont été enregistrées. Les espèces caractéristiques des autres formations forestières sont également peu représentées dans les syntaxons (moins de 40%). Il ressort donc de cette étude que le parc national du Banco demeure une forêt à Turraeanthus africanus et Heisteria parvifolia.   The disturbance of the environment is at the origin of the destruction of the habitats, it contributes to the loss of the biodiversity and is one of the causes of the change of the flora in a locality. It therefore leads to the transformation of plant associations. The main objective of this study is to research the plant associations in the Banco National Park following village plantations and silvicultural trials due to the search for a methodology specific to African silviculture. To do this, the phytosociological characterization of the former treatment sites and the forest reserve was carried out. The method used is that of synusial phytosociology. The 91 surveys (82 in the former silvicultural treatment sites and 9 in the forest reserve) made it possible to identify 337 species of plants divided into 65 families and 268 genera. The dendrogram resulting from the ascending hierarchical classification of the readings revealed three syntaxa, two of which essentially consist of the readings of the old treatment sites and one of the readings of the forest reserve. No syntaxon contains all the characteristic species of the Turraeantho-Heisterietum association. However, in two syntaxa, the proportion of characteristic species of this association is greater than 50%. 70.59% in the syntaxon to Tarrietia utilis and Cola heterophylla (syntaxon from secondary forests), 52.94% in the syntaxon to Cola chlamydantha and Drypetes chevalieri (syntaxon from the forest reserve). While in the Dacryodes klaineana and Pleiocarpa mutica syntaxon (secondary forest syntaxon), 41% of these characteristic species were recorded. Species characteristic of other forest formations are also poorly represented in the syntaxa (less than 40%). It therefore emerges from this study that Banco National Park remains a forest with Turraeanthus africanus and Heisteria parvifolia

Un Leptactina (Rubiaceae, Pavetteae) nouveau de République Centrafricaine: Leptactina deblockiae

A new species of Leptactina (Rubiaceae) with axillary inflorescences, gibbous stipules and fruits ellipsoid from Cenral African Republic, L. deblockiae Neuba & Sonké, is described and illustrated here. Affinities of this new taxon with other species of Leptactina is discussed. A key of Leptactina species with axillary inflorescences is provided. © Publications Scientifiques du Muséum national d'Histoire naturelle.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

An extraordinary new rheophyte in the genus Leptactina (Rubiaceae, Pavetteae) from Rio Muni (Equatorial Guinea)

A distinctive new species of Rubiaceae from Rio Muni, Equatorial Guinea, is described and illustrated. Leptactina rheophytica is the only rheophyte known in the genus. Its diagnostic characters are elucidated, its taxonomic affinities are discussed, and notes on its conservation status are provided. © 2007 The Linnean Society of London.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Analyse de la distribution des Acanthaceae en Afrique centrale: Comparaison avec les théories phytogéographiques de Robyns, White et Ndjele

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Analyse de la distribution spatiale des Acanthaceae en Afrique Centrale et comparaison avec les théories phytogéographiques de Robyns, White et Ndjele

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Influence des actions anthropiques sur la dynamique spatio-temporelle de l’occupation du sol dans la province du Bas-Congo (RDCongo)

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Spatial pattern analysis as a focus of landscape ecology to support evaluation of human impact on landscapes and diversity

The relation between landscape patterns and ecological processes forms a central hypothesis of landscape ecology. Three types of pattern analysis to assess anthropogenic impacts on landscape ecosystems and biodiversity are presented in this chapter. Firstly, the results of an analysis of Acanthaceae data in Central Africa are presented and compared with phytogeographic theories. Phytogeography data reflect the spatial variability of plant diversity, and constitute therefore a major tool in conservation policy development. We investigated if it was possible to proxy the phytogeographic classifications by the spatial distribution of Acanthaceae only. When combined with a classic landscape pattern analysis, this type of study could provide complementary information for the definition of conservation priorities. Secondly, we present an analysis of periodic vegetations in the Sudan. It can be accepted that through an understanding of the underlying mechanisms of the formation of this unique pattern geometry, the knowledge with regard to the functioning and vulnerability of these ecosystems can be deepened. Using high-resolution remote sensing imagery and digital elevation models, the relation between pattern symmetry and slope gradient was explored. In particular, slope gradients that could condition the transition between spotted and tiger bush pattern types were focused. The influence of other sources of anisotropy was also considered. Finally, a complementary approach to the calculation of landscape metrics to analyse landscape pattern is described, using the spatial processes themselves causing landscape transformation. Landscape ecologists agree that there appears to be a limited number of common spatial configurations that can result from land transformation processes. Ten processes of landscape transformation are considered: aggregation, attrition, creation, deformation, dissection, enlargement, fragmentation, perforation, shift, and shrinkage. A decision tree is presented that enables definition of the transformation process involved using patch-based data. This technique can help landscape managers to refine their description of landscape dynamics and will assist them in identifying the drivers of landscape transformation.SCOPUS: ch.binfo:eu-repo/semantics/publishe