Barthélémy Kassa's research while affiliated with University of Abomey-Calavi and other places

Publications (24)

Article
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Our understanding of the role of fire and effect of ant species composition, beyond their diversity and abundance, on the effectiveness of mutualism defence is limited. Most of our knowledge of ant–plant defence in tropical Africa is biased towards East African savannas which have richer soil, higher primary productivity and a more diverse arthropo...
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Understanding folk classification system of perceived variation and preferences in fruit traits are necessary to effectively engage farmers in the domestication of wild edible fruit tree species. Social attributes can help to better understand perception of variation, and preferences. We focused on Parkia biglobosa (Jacq.) Benth., a valuable fruit...
Article
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Parkia biglobosa (Jacq.) R. Br. ex G. Don is one of the most common traditional parkland tree species that generates vital non-timber forest products and benefits for local people in Sub-Saharan Africa. Despite its socio-economic importance and value for local and regional economies, the species has remained at infant stage of domestication, yet de...
Article
Background The habitat degradation together with fragmentation and illegal hunting represent a major threat for biodiversity conservation in Lama protected areas. Method We used a combination of questionnaire survey with local communities for ranking the hunted mammal species as bushmeat and track surveys in gridded-cell system of 500x500 m ² (n=2...
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Large predators in West Africa are threatened with extinction mainly by direct and indirect effects of human activities. Within this context, intraguild competition can limit populations of some species and even play a role in extinction. In this study, we used camera trapping to assess the spatial and temporal patterns of niche partitioning betwee...
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The study was based on 107 studies and data concerning disperser species, plant species and family, fruit type and size, seed size plant life form and the habitat, were presented in matrix form. Data from this matrix were used in determining the disperser species diversity considering large taxonomic groups (mammals, birds and reptiles) and selecti...
Article
Spatial patterns (SP) of treefall by elephants is known to be clustered across landscapes as a result of food selection and group foraging. Yet, few studies have explicitly elucidated how elephant pressure (EP) alters SP and tree-to-tree distance of tree species especially for dioecious plant species, at stand scale. Using the pair-correlation func...
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We undertook a survey of 112 cattle farms in the periphery of Cotonou in Benin, with the aim to characterize the diversity of the production systems and to better understand herders’ feeding strategies and perspectives. We used the categorical component analysis and two-step clustering techniques to classify the farms into homogeneous groups. The a...
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This study assessed endogenous knowledge and impact of human disturbance on the abundance of two underutilized wild fruit tree species: Drypetes floribunda (Mu¨ll. Arg.) Hutch. (Euphorbiaceae) and Mimusops andongensis Hiern. (Sapotaceae) in the Lama Forest Reserve (LFR) in southern Benin. A survey was conducted with 145 randomly selected people amo...
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There is increasing interest in home gardens (HGs) as biodiversity hot spots. However, knowledge on how sociocultural characteristics and environment influence knowledge and management of HG species is still limited. Eliciting these links helps illustrate how HG could conserve biodiversity. This study addressed the following hypotheses: (i) age and...
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Multiple land uses including tourism, hunting, and agriculture around protected areas can be a serious complication for wildlife management. We calculated habitat selection indices (Manly's alpha) for 10 bovid species in the Pendjari Biosphere Reserve in Benin, west Africa, to assess if habitat use differed in each bovid species between hunting and...
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An investigation was conducted in the ten phytodistricts of Benin, West Africa, in order to assess the level of morphological variation in Jatropha curcas seed and their germination potential. Hierarchical classification of the morphological traits of seeds identified five morphotypes, using 54% of the overall morphological information. Canonical d...
Article
This study assessed the level of bark damage on baobab trees (Adansonia digitata) as caused by elephants (Loxodonta africana), and the possibility of finding refuges where baobab could escape bark damage within the Pendjari Biosphere Reserve (PBR). Distributions of elephants and baobab trees within the PBR were compared using presence records of bo...
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Afzelia africana is a multi-purpose woody species threatened by a lack of natural regeneration in the wild. In the present study, differences in seed germination capacity and seedling growth between morphotypes of the seeds of A. africana Sm. were evaluated. A total of 600 seeds were collected in the Sudanian and Guinean climatic zones of Africa an...
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This study examines the environmental factors affecting the density of the exploited giant land snail species, Archachatina marginata, Achatina fulica and Limicolaria flammea in the Dassa-Zoumè district of Benin. Thirty plots of 30 m £ 30 m were laid out, within four vegetation types (fallows, forest, woodlands and wood savannah). Inside each plot...
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Niche theory suggests differential use of shared resources facilitates coexistence of species in a community. In this study we used the faecal stable isotope analysis with observations along transect lines perpendicular to the Pendjari River. This was to examine seasonal habitat features and diet partitioning between two sympatric bovid species wat...
Article
Full-text available
This study assessed the level of bark damage on baobab trees (Adansonia digitata) as caused by elephants (Loxodonta africana), and the possibility of finding refuges where baobab could escape bark damage within the Pendjari Biosphere Reserve (PBR). Distributions of elephants and baobab trees within the PBR were compared using presence records of bot...
Article
Full-text available
The velvet tamarind (Dialium guineense Willd) is one of the key species for domestication in Sub-Saharan Africa. In order to help the sustainable management and conservation of this species, its structural characteristics and ethnobotanical traits were studied in the 4 vegetation types (typical dense forest, degraded dense forest, young fallow and...
Article
Niche theory suggests differential use of shared resources facilitates coexistence of species in a community. In this study we used the faecal stable isotope analysis with observations along transect lines perpendicular to the Pendjari River. This was to examine seasonal habitat features and diet partitioning between two sympatric bovid species wat...
Article
Full-text available
Despite growing literature supporting the importance of home gardens (HG) as biodiversity hotspots, knowledge of patterns of their contribution to conservation of threatened species and crop wild relatives (CWR) across climate and culture in Africa is still limited. This investigation was conducted across three climatic zones to assess the floristi...
Article
Full-text available
This study investigated composition and selectivity in diet for waterbuck in the Pendjari National Park in north-western Benin, through the use of micrographic analysis of faecal samples. Three plant species (Panicum anabaptistum, Echinochloa stagnina and Andropogon gayanus) were regularly consumed all year round. Meanwhile, three other species (i....

Citations

... Several studies have focused on these species, but most have overlooked how local communities practically distinguish them. The lack of an adequate classification system such as the folk classification (Houndonougbo et al. 2020) tends to create botanical confusion between these two species. Such confusion could favour erroneous assessment of the species (Najem et al. 2021). ...
... As the tree has a significant extent across western Africa and all the way eastward to Uganda, their numbers are still substantial as compared to other endangered species. A global review of conservation of P. biglobosa concluded that there are significant gaps in knowledge and very little about the status of the tree in central and eastern Africa [88]. However, our research shows that where the African Locust Bean is declining, as in our case-study community, it has negative repercussions that warrant attention. ...
... Benin, a country fully included in the Dahomey Gap zone, provides a representative example of the superimposed effects of climatic fluctuations and human activity on forest fragmentation and faunal depletion (Kokou et al., 2008). Such effects are currently exacerbated by illegal forest exploitation including hunting, harvesting, transport, processing, purchase and sale of forest and wildlife products in violation of national laws (Djagoun & Gaubert, 2009;Djagoun et al., 2018a;2018b), turning southern Benin into an extensive agricultural landscape (Siebert & Elwert, 2004). As a consequence, several vertebrate species have been extirpated from their natural habitats or have seen a decline in their population status (Djagoun et al., 2018a;2018b). ...
... Competition between coexisting species that belong to the same guild is especially interesting, because the more similar the ecological niche of two species is, the larger the competition among them (May & MacArthur, 1972). Animals that share resources tend to use different foraging strategies to decrease this potential competition, through morphological adaptations, establishment of hierarchies, behavioral adaptations or spatial or temporal segregation (Carrete et al., 2010;Sogbohossou et al., 2018). In this sense, the scavenger guild is an interesting assemblage because carrion offers highly nutritive biomass concentrated in space and time, which tends to be unpredictable and ephemeral (DeVault et al., 2003;Mole on et al., 2019). ...
... Tropical and sub-tropical rainforests experience pronounced seasonal fluctuations in resource availability mainly brought about by changes in rainfall patterns (Corlett and Primack, 2011). These fluctuations have consequences for the activity patterns and movements of forest dwelling mammals (Djagoun et al., 2013;Gould and Gabriel, 2014). In this study, we found that for all species detected in both seasons, there were changes in occupancy between seasons although generally, there was no detectable trend as there was a perfect split in the number of species whose occupancy estimates were higher in the dry and wet season. ...
... However, there is no association between doum palm and other species (Idohou et al. 2016a), suggesting that heterospecific tree density may negatively influence palm structure. Salako et al. (2015; showed that elephants' influence on B. aethiopum structure in Benin causes a critical issue of conservation in protected areas. Besides, land use types and agricultural systems influence palms structure (Idohou et al. 2016a, b, c;Madelaine et al. 2008). ...
... Le point-transect a été une variante de la méthode de transects linéaires dans laquelle la longueur du transect était réduite à un point (Zéro mètre). L'observateur placé en un point (point-transect) a noté toutes les observations sur la faune (mammifères, oiseaux, reptiles et batraciens) vues ou entendues au cours d'un recensement de durée déterminée (Blondel et al., 1970 ;Kassa et Sinsin 2015). Dans le cas de la présente étude, 32 points-transects ont été installés au niveau de quatre types de parcelles d'exploitation de la plantation de bois de feu (SEV), la distance entre deux points était de 500 m environ. ...
... It shown that areas with extensive forest cover, with more challenging patrolling and enforcement than in open savannah, show, for example, a top level of poaching in elephant (Burn et al. 2011). Distance to water is targeted as the primary environmental factor influencing the density of large mammal species population in PAs (Redfern et al. 2003;Djagoun et al. 2014) and driving the poacher's interest on those sites. ...
... In African savannas, elephants (Loxodonta africana) confined to protected areas are a major driver of savanna dynamics, impacting trees through browsing, bark stripping and uprooting (hereafter called 'elephant damage') (Asner and Levick 2012;Kassa et al. 2014;Morrison et al. 2016;Salako et al. 2016). Elephants disproportionately damaged certain tree species relative to their availability on the landscape as it is the case for Adansonia digitata, Borassus aethiopum (Salako et al. 2016) and Acacia senegal (Morrison et al. 2016). ...
... Magnoliopsida, order Ebenales/Ericales and to the family In national languages, Mimusops andongensis Hiern Sapotaceae. Mimusops andongensis Hiern is a Wild is called bohê [10] or afoutin in Fon [11] and égui ochéé Edible Fruit Tree (WFET) listed among food and medicinal in Holli [10], for others in Fon it is called kinwi and in populations [1][2][3][4]. This predisposes it to a potential threat. ...