References of "Vermeulen, Cédric"
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See detailComment les villageois nomment-ils et s’approprient-ils leurs espaces ressources ? Description d’un socio-écosystème en pays Yambassa, Cameroun
Gillet, Pauline ULg; Codina Llavina, Elisabeth; Yambene, Henri et al

in Cahiers Agricultures (2016), 25

The comprehension of the relations that human society have with their environment helps to anticipate the obstacles to rural development measures planned thanks to the comprehension of local mechanisms ... [more ▼]

The comprehension of the relations that human society have with their environment helps to anticipate the obstacles to rural development measures planned thanks to the comprehension of local mechanisms governing access to land and resources. This study describes the land tenure, typology of space and land uses in a densely populated village (65 inhabitants/km2) located 100 km north of Yaoundé and populated by citizens of the ethnic subgroup Gunu. The land tenures are strong and go up to the official recognition of private property. Any relaunch of the cocoa sector will take place in highly contested areas, and perhaps at the expense of the last remnants of natural formations with a major effect on gender division of labor and land appropriation. [less ▲]

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See detailConserving wildlife amongst the cotton fields. A third of a century of experience at the Nazinga Game Ranch, Burkina Faso
Bouché, Philippe; Lejeune, Philippe ULg; Bailly, Vincent et al

in Environmental Monitoring & Assessment (2016), 188

Established in the early 1970 as a participatory wildlife production area, the Nazinga Game Ranch turned into an island of conservation surrounded by cultivation.We asked ourselves how long-term ungulate ... [more ▼]

Established in the early 1970 as a participatory wildlife production area, the Nazinga Game Ranch turned into an island of conservation surrounded by cultivation.We asked ourselves how long-term ungulate trends are affected in a context of continuous human pressure. To find out, we compiled and analysed the data of yearly line-transect counts of mammals carried out since 1985. Results showed that large species such as the elephant (Loxodonta africana) and large antelopes increased or showed stable populations. In contrast, medium and small ungulates showed continuously decreasing trends. During the same period, rainfall, water availability from artificial water points and the crop encroaching outside Nazinga Game Ranch increased. After an initial significant reduction, illegal human signs increased. However, we showed that human signs were positively correlated with the abundance of large ungulates but negatively correlated with the abundance of medium and small ones. In conclusion, this study showed that some isolated mammal populations could be restored and maintained in the long term, in spite of being surrounded by highly cultivated areas. [less ▲]

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See detailWestern lowland gorilla an logging companies A winning duo ?
Haurez, Barbara ULg; Petre, Charles-Albert ULg; Brostaux, Yves ULg et al

Conference (2016)

The critically endangered western lowland gorilla (WLG) disperses the seeds of many fruits. These seeds are often deposited at gorilla nest sites, in open-canopy habitats favorable for seedling growth and ... [more ▼]

The critically endangered western lowland gorilla (WLG) disperses the seeds of many fruits. These seeds are often deposited at gorilla nest sites, in open-canopy habitats favorable for seedling growth and recruitment. However, considering anthropogenic disturbances, such as logging, gorillas and the directed seed dispersal services they provide are at risk. On the other hand, sustainably managed logging concessions are reported to harbor viable gorilla populations. If WLG provide effective dispersal of timber species, it would be of benefit to loggers for these ecological services to be preserved. In order to explore such interactions between the WLG and the timber industry, we (1) assessed the status of a WLG population in a logging concession, and (2) investigated their seed dispersal effectiveness for timber species. We inferred the long-term viability of a gorilla population in a Gabonese logged forest, and the short-term impact of timber harvesting on this population. Gorilla density was estimated through three successive censuses: (1) 25 years after the first felling cycle, (2) six months and (3) one year after the second felling cycle. Seed dispersal effectiveness for timber species was estimated through gorilla fecal analysis and germination trials in a nursery. The results suggested that a viable population of WLG could be maintained in selectively logged forests (< 2 cut trees ha-1). Indeed, although gorillas tend to flee areas being actively exploited for timber, their densities in logged forests can regain their initial levels, or even a higher one, within one year post-logging. Over a period of 20 months, the seeds of 59 plant species were found in gorilla feces. Nearly 20 % of the identified species (N=35) are of economic value because of their exploitation for timber. Analyzed fecal units contained on average 81.0 ± 107.8 intact seeds (0-566). Specific germination success varied from 0 to 100 %, with an average of 46 ± 36 %. Sustainably-managed logging concessions may host viable populations of WLG. Considering the seed dispersal services provided for timber species and the unique directed-dispersal to open-canopy habitats, gorillas are implicated in the regeneration and maintenance of logged forests. Therefore, the generalization of sustainable logging would be beneficial both to the economical and the environmental value of tropical forests, thus providing an incentive for loggers and governments to prevent illegal hunting in concessions. [less ▲]

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See detailDu “land sparing” au “land sharing” ? Vers une gestion des droits superposés dans les forêts denses humides africaines
Karsenty, Alain; Vermeulen, Cédric ULg

in Le Roy, Etienne; Karsenty, Alain; Bertrand, Alain (Eds.) La sécurisation foncière en Afrique. Pour une gestion viable des ressources renouvelables (2016)

En 1996, le chapitre « Maitrises foncières et gestion forestière » de cet ouvrage faisait le constat de choix de gestion dans les forêts denses humides en Afrique fondés sur la spécialisation et la ... [more ▼]

En 1996, le chapitre « Maitrises foncières et gestion forestière » de cet ouvrage faisait le constat de choix de gestion dans les forêts denses humides en Afrique fondés sur la spécialisation et la dissociation des espaces. La conception « exclusive » des forêts communautaires alors en cours de constitution au Cameroun, strictement séparées des concessions industrielles et des aires protégées, nous paraissait inadaptée aux modes concrets d’utilisation de l’espace et des ressources par les populations locales. C'est à l'organisation des usages différents d'un même écosystème que devrait s'attacher une gestion forestière visant la viabilité à long terme, faute de quoi les besoins de complémentarité des activités agricoles et forestières se transforment en demandes concurrentes sur un espace devenu un enjeu. Les économistes appellent ce type de situation des « jeux à sommes nulles », ou ce qui est gagné par l'un est strictement perdu par l'autre. [less ▲]

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See detailVers des concessions 2.0. Articuler gestion inclusive et exclusive dans les forêts de production en Afrique centrale
Karsenty, Alain; Vermeulen, Cédric ULg

in Buttoud, Gérard; Nguinguiri, Jean-Claude (Eds.) La gestion inclusive des forêts d’Afrique centrale. Passer de la participation au partage des pouvoirs (2016)

Les concessions forestières industrielles sont caractérisées par un faible niveau de participation des populations locales. Leur évolution vers des modèles plus inclusifs semble inévitable, sur la base de ... [more ▼]

Les concessions forestières industrielles sont caractérisées par un faible niveau de participation des populations locales. Leur évolution vers des modèles plus inclusifs semble inévitable, sur la base de la cartographie participative et de l’institutionnalisation des espaces coutumiers traversés. Déjà utilisés par quelques sociétés comme clé de partage des bénéfices, la reconnaissance systématique de ces espaces superposés peut constituer la base d’une nouvelle gouvernance, plus inclusive, de concessions évoluant vers des formes d’institutions territoriales de développement. Une évolution de la législation permettrait aux concessionnaires de constituer des structures conjointes d’exploitation commerciale de produits non ligneux avec les communautés parties prenantes de la gestion de la concession 2.0, afin de permettre la valorisation commerciale de ressources autres que le bois d’oeuvre et de développer des intérêts communs. La foresterie communautaire pourrait ainsi se déployer selon une double logique, inclusive (à travers la gestion des droits superposés) et exclusive (à travers la constitution de concessions communautaires aux côtés des concessions industrielles) en s’appuyant sur des ajustements des limites des unités d’aménagement à l’occasion des classements ou des enregistrements légaux des différentes catégories de concessions. [less ▲]

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See detailToward “Concessions 2.0”: articulating inclusive and exclusive management in production forests in Central Africa
Karsenty, Alain; Vermeulen, Cédric ULg

in International Forestry Review (2016), 18(S1), 13

Industrial forest concessions cover about 45 million hectares in Central Africa. This paper discusses the weaknesses of the current concession model and initiatives for helping it evolve; it then proposes ... [more ▼]

Industrial forest concessions cover about 45 million hectares in Central Africa. This paper discusses the weaknesses of the current concession model and initiatives for helping it evolve; it then proposes a new type of concession, entitled ‘Concessions 2.0’, adapted to the future challenges presented by the overlapping among the rights and modes of the harvesting of multiple resources. This proposed model is based on four features: (i) mapping and recognition of the customary territories within and around the industrial concession, (ii) timber revenue sharing indexed on the extension of the customary territories and contractual management agreements within the communities, (iii) allowance of commercial exploitation of non-timber resources by entitled claimers under the supervision and/or in association with the concessionaire, and (iv) inclusive governance for the management of overlapping rights over the concession area. [less ▲]

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See detailLes paysans sans terre et REDD+ – les logiques locales face aux interventions internationales
Reyniers, Camille; Vermeulen, Cédric ULg; Karsenty, Alain

Conference (2016)

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See detailShort term impact of selective logging on a western lowland gorilla population
Haurez, Barbara ULg; Tagg, Nikki; Petre, Charles-Albert ULg et al

in Forest Ecology & Management (2016), 364

Selective timber production is implemented over a large proportion of the world’s tropical forests. Within these forest ecosystems, the frugivore community contributes important ecological services ... [more ▼]

Selective timber production is implemented over a large proportion of the world’s tropical forests. Within these forest ecosystems, the frugivore community contributes important ecological services through animal-mediated seed dispersal. However, there is no clear understanding of the impacts of logging on wildlife or of the extent to which seed dispersal is preserved in logged forests. Given its tendency for nesting in light gaps, the western lowland gorilla is likely to provide directed-dispersal services to a wide range of tree species. Production forests preserved from poaching have been reported to harbor high densities of gorillas, but the monitoring of gorilla populations subjected to logging is poorly documented. This study investigated gorilla density and nesting behavior after timber exploitation in a logging concession in southeast Gabon. Nest count censuses were performed on line transects, before and after the second felling cycle. Gorilla density dropped from 1.5 (116.7 nests km 2, 95% CI = 83.4–163.5) to 1.0 (64.9 nests km 2, % CI = 32.6–129.5) weaned gorilla km 2 4–6 months after logging, then rose to 2.6 (176.3 nests km 2, 95% CI = 113.5–274.1) gorillas km 2 9–11 months after logging. A consistent preference for nesting in open canopy terra firma forest was observed during all censuses. This study demonstrates the short-term resilience of the western lowland gorilla to selective timber harvesting, and argues that they offer a continued contribution to directed-dispersal services within months after logging. Although a long-term monitoring of gorillas in a logged forest should be undertaken, the role of this species in logged forest recovery is thought to be important. The preservation of gorilla should receive particular consideration by forest managers. [less ▲]

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See detailIdentification d’indicateurs de la transition forestière en lien avec les impacts de la déforestation sur les socio-écosystèmes en Afrique centrale
Gillet, Pauline ULg; Vermeulen, Cédric ULg

Poster (2015, December 26)

La théorie de la transition forestière lie l’évolution du couvert forestier au temps (Mather, 1992). Dans la première phase, le couvert forestier est très dense. Il diminue ensuite avec l’augmentation de ... [more ▼]

La théorie de la transition forestière lie l’évolution du couvert forestier au temps (Mather, 1992). Dans la première phase, le couvert forestier est très dense. Il diminue ensuite avec l’augmentation de la densité de population qui pratique la défriche pour la production agricole et utilise le bois pour répondre aux besoins en énergie et en bois d’œuvre. Dans un troisième temps, l’économie se spécialise, l’agriculture s’intensifie et est pratiquée sur les terres les plus productives et le rôle de l’écosystème forestier dans l’économie diminue. L’abandon des terres les moins productives permet la recolonisation forestière visible sur la courbe de transition. La présente étude tente d’identifier et de proposer des indicateurs d’occupation spatiale permettant, sur base d’images de télédétection, de prévoir la position réelle d’un site sur la courbe de transition forestière. Ensuite, l’étude des socio-écosystèmes en lien avec la transition forestière permet de démontrer l’impact de la diminution du couvert forestier sur le fonctionnement des sociétés humaines. Nous nous sommes penchés sur différents aspects caractérisant les activités des populations locales dans trois sites d’étude situés sur un gradient de déforestation en Afrique centrale tels que la composition de repas et l’origine des aliments. On observe que la déforestation induit une diminution des composants issus des activités fortement liées à l’écosystème telles que la chasse, la pêche ou la collecte au profit de l’agriculture et de l’élevage. [less ▲]

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See detailVers des Concessions 2.0 en Afrique Centrale. Reconnaitre et gérer les droits superposés
Karsenty, Alain; Vermeulen, Cédric ULg

Conference (2015, December 05)

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See detailToward Concessions 2.0 in Central Africa Recognising and managing overlapping tenure rights
Karsenty, Alain; Vermeulen, Cédric ULg

Conference (2015, November 30)

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See detailField data on the little known and endangered Lepilemur mittermeieri
Wilmet, Leslie ULg; Schwitzer, Christoph; Beudels-Jamar, Roseline C. et al

in Journal of Primatology (2015), 4(2),

Lepilemur mittermeieri is a very little known sportive lemur of the Ampasindava peninsula of Madagascar, presently regarded as endangered. On the basis of genetic material only, obtained from three ... [more ▼]

Lepilemur mittermeieri is a very little known sportive lemur of the Ampasindava peninsula of Madagascar, presently regarded as endangered. On the basis of genetic material only, obtained from three individuals collected at the same locality. No observation confidently allocated to the species has been reported since. The objectives of our research were to verify that the sportive lemurs found in forests of the Ampasindava peninsula beyond the type-locality of Lepilemur mittermeieri belonged to the same species as the type, to provide morphological and behavioural data for populations confidently attributed to L. mittermeieri and to obtain for these populations preliminary evaluations of density variations within the peninsula. Our surveys were undertaken in March and April 2014 in remnant forest patches of the western part of the Ampasindava peninsula. Linear transects by night and punctual observations by day were conducted. A total of 54 animals were seen along nine transects situated in four forest patches, two at low altitude and two at high altitude. All animals examined and photographed appeared similar, and the impression was gained that a single taxon was involved. Genetic material collected from one dead specimen proved identical to the type of L. mittermeieri which confirmed the identity of the populations we observed. It thus appears that L. mittermeieri is indeed the only sportive lemur present on the peninsula and that it occurs in several forest remnants. We endeavoured to get evaluations of the density and abundance of the species in the four forest patches we studied. We used KAIs (Kilometric Abundance Indices) to evaluate and compare relative densities, and Buckland’s distance sampling method to evaluate absolute densities. The latter suggested a density of 1.9 animals/ha, a result that must, however, be taken with caution. [less ▲]

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See detailLes forêts communautaires : élaboration des plans simples de gestion
Julve, Cécilia; Meunier, Quentin; Pasquier, Alexandra et al

in Mille, Gilles; Louppe, Dominique (Eds.) Mémento du forestier tropical (2015)

Le chapitre présente les grandes lignes de l'aménagement des forêts communautaires en Afrique centrale

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See detailTracks as a non-invasive tool for monitoring large carnivores
Authelet, Manon ULg; Vermeulen, Cédric ULg

Conference (2015, October 13)

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See detailPopulation density evaluation of Lepilemur mittermeieri in the Northwest Madagascar - Ampasindava peninsula
Commans, Morgane; Wilmet, Leslie ULg; Vermeulen, Cédric ULg

Scientific conference (2015, October 13)

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See detailWildlife conservation at Madagascar - A global overview
Wilmet, Leslie ULg; Vermeulen, Cédric ULg; Beudels Jamar, Roseline C.

Scientific conference (2015, October 13)

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See detailWiMUAS: New inventory method to perform wildlife counts with UAS and review the large datasets
Linchant, Julie ULg; Lhoest, Simon ULg; Semeki, Jean et al

Conference (2015, October 13)

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See detailImpact of forest transition on non-timber forest products in Central Africa
Gillet, Pauline ULg; Vermeulen, Cédric ULg; Feintrenie, Laurène

Conference (2015, September)

The objective of the study is to evaluate the impact of deforestation on non-timber forest products (NTFPs) harvest in Central Africa. The most common vegetal NTFPs are fruits, barks and leaves used as ... [more ▼]

The objective of the study is to evaluate the impact of deforestation on non-timber forest products (NTFPs) harvest in Central Africa. The most common vegetal NTFPs are fruits, barks and leaves used as complements to the staple food (cassava or plantain). Animal NTFPs such as caterpillars, worms and bush meat represent a major source of animal protein in the villagers’ diet. We analyzed the evolution of several parameters including NTFPs diversity, distance to the road, changes in land tenure rules, proportion in the alimentary bolus and in the villagers’ incomes. The research is based on field surveys, participatory mapping and geolocation of activities held in 8 villages. Three study sites are located at different stages on Mather’s forest transition curve (Mather, 1992). This curve shows the relationship between forest cover and population density. The sites represent the situations: (i) important cover of intact forest, (ii) forest partially degraded and under pressure of conversion to other land uses and (iii) small surfaces of degraded forest with a trend of plantation of useful trees on deforested land. Results show a reduction in NTFPs diversity along with the increase of deforestation. The maximum distance of collection sites to the road increases between the first and the second study site, as a consequence of the decrease in the quantity of NTFPs available. This distance decreases significantly in the third study site due to the contraction of villages’ terroir. The diversity of bush meat decreases while the hunting bag evolves from big to small species along with the forest transition. Land tenure rules to access and extract NTFPs become stricter. As a consequence, the proportion of these products reduces in the alimentary bolus and in the family cash income. This analysis establishes a strong link between Mather’s forest transition curve and the decline of the importance of NTFPs in the village production and livelihoods systems [less ▲]

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