2 research outputs found

    Efficacité des Aires Communautaires de Conservation de la Biodiversité (ACCB) à protéger les espèces ligneuses menacées dans la réserve de biosphère du Mono (Bénin)

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    La crĂ©ation des rĂ©serves de biosphère constitue une des stratĂ©gies adoptĂ©es pour assurer la  conservation de la biodiversitĂ©. MalgrĂ© cette disposition, l'efficacitĂ© des rĂ©serves de biosphère pour garantir la conservation de la biodiversitĂ© demeure encore un sujet de discussion scientifique. Cette Ă©tude visait Ă  analyser l'efficacitĂ© de la rĂ©serve de biosphère du Mono au BĂ©nin dans la conservation des espèces ligneuses menacĂ©es. Une modĂ©lisation de l'entropie maximale (MaxEnt) a Ă©tĂ© rĂ©alisĂ©e pour identifier les habitats favorables de ces espèces ligneuses menacĂ©es. Les habitats favorables aux diffĂ©rentes espèces ligneuses menacĂ©es ont ensuite Ă©tĂ© superposĂ©s aux ACCB existantes pour dĂ©terminer la proportion des habitats favorables retrouvĂ©e dans ces ACCB. Les rĂ©sultats ont rĂ©vĂ©lĂ© des lacunes en matière de conservation dans la rĂ©serve de biosphère du Mono, car plus de 86% des habitats favorables aux espèces ligneuses menacĂ©es se trouvaient hors de l’aire centrale et de la zone tampon de la rĂ©serve oĂą Ă©taient concentrĂ©s les efforts de conservation. Sur la base de ces rĂ©sultats, il est nĂ©cessaire de gĂ©nĂ©rer de nouvelles aires centrales Ă  partir des habitats appropriĂ©s des espèces ligneuses menacĂ©es pour rĂ©duire les lacunes de conservation dans la rĂ©serve de biosphère du Mono. English title: Effectiveness of Community Areas for Biodiversity Conservation (ACCB) in protecting threatened woody plant species in the Mono biosphere reserve (Benin) The creation of biosphere reserves is one of the strategies adopted to ensure the conservation of biodiversity. However, the effectiveness of biosphere reserves in ensuring the conservation of biodiversity still remains a subject of scientific debate. This study aimed to analyse the effectiveness of the Mono biosphere reserve (Benin) in the conservation of threatened woody species. Maximum entropy modelling (MaxEnt) was performed to identify suitable habitats for these threatened woody species. The suitable habitats for the various threatened woody species were then superimposed on the existing ACCB to determine the proportion of suitable habitats found in these ACCB. The results revealed conservation gaps in the Mono biosphere reserve, as more than 86% of suitable habitats for threatened woody species were found outside the core area and buffer zone of the reserve where conservation efforts were concentrated. Based on these results, it is necessary to generate new core areas from suitable habitats of threatened woody species to reduce the conservation gaps in the Mono biosphere reserve

    Phenotypic Evaluation of Mother Trees and their Effects on Seed Emergence and Growth Dynamics of African Locust Bean Seedlings in Nursery

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    This study was carried out in order to identify the most productive in term of seeds between African locust bean trees aged 10-29 years, 30-50 years and 51 years and older. It aims also to identify which one can guarantee better emergence and growth of young P.B seedlings in the nursery. These plants were chosen according to the availability of fruit and their accessibility. For the emergence and growth tests, a complete randomized block design with three replicates, each with three treatments was installed. The SPSS v21 software was used for statistical analysis, with a significance level of 5%.The results show that the dendrometry and productivity parameters are better when the plants are at least 30 years old (DBH > 44 cm). Indeed, seeds from trees aged 30 - 50 years significantly improved seed emergence by giving a rate of 70.33%±7.23. Plants growth was not significantly affected by trees age
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