References of "Vermeulen, Cédric"
     in
Bookmark and Share    
Full Text
See detailForest or agroforestry systems, farmers value trees for ecosystem services provision in Nicaragua
Feintrenie, Laurène; Cifuentes-Espinosa, J. A.; Dos Santos-Moreira, N. et al

in Dupraz, Christian; Gosme, Marie; Lawson, Gerry (Eds.) 4th World Congress on Agroforestry. Book of abstracts. (2019, May)

Detailed reference viewed: 20 (2 ULiège)
Full Text
See detailQuel est le potentiel des drones pour inventorier les populations animales ?
Lhoest, Simon ULiege; Authelet, Manon ULiege; Bouché, Philippe et al

Conference given outside the academic context (2019)

Detailed reference viewed: 17 (2 ULiège)
Full Text
Peer Reviewed
See detailLes Plans Simples de Gestion destinés à la production de bois-énergie en périphérie de Kinshasa : la participation et la restauration à l’épreuve du foncier
Péroches, Adrien; Dubiez, Emilien; Peltier, Régis et al

in Bois et Forêts des Tropiques (2019), 340

En République démocratique du Congo, l’agriculture itinérante sur brûlis et la production de bois-énergie sont les principales activités génératrices de revenus des populations périurbaines. Mais ces ... [more ▼]

En République démocratique du Congo, l’agriculture itinérante sur brûlis et la production de bois-énergie sont les principales activités génératrices de revenus des populations périurbaines. Mais ces activités sont également les premières causes de déforestation, comme c’est le cas dans un rayon de 200 km autour de Kinshasa et autour des principales métropoles du pays. Afin d’améliorer la gestion des espaces périurbains et d’assurer l’alimentation durable en bois-énergie de Kinshasa, le projet UE Makala a co-construit avec douze communautés du Plateau Batéké et du Kongo central des Plans Simples de Gestion des terroirs et du bois-énergie via une méthode participative. En complément, des itinéraires techniques (plantations agroforestières à Acacia auriculiformis et d’essences locales, régénération naturelle assistée) ont été proposés et testés avec les agriculteurs producteurs de bois-énergie de ces communautés. Après une période de 18 mois de mise en oeuvre autonome des Plans Simples de Gestion, une évaluation de leur appropriation par « Principes, critères, indicateurs et vérificateurs » a été menée. Cette évaluation a montré que le niveau d’appropriation des Plans Simples de Gestion et des itinéraires techniques promus par le projet UE Makala est meilleur au Kongo central, où la forêt a quasiment disparu, qu’au plateau Batéké où des reliquats de forêts-galeries existent encore. De plus, il a été mis en évidence dans les deux zones que les activités collectives étaient peu appropriées alors que les activités individuelles, pour lesquelles la répartition du travail et des bénéfices était sans ambiguïté, ont été plus largement appropriées. Cependant, à l’échelle individuelle, des différences notables d’appropriation ont été constatées en fonction du statut foncier des bénéficiaires. Les faibles superficies disponibles et l’accès au foncier sont les principaux facteurs limitant l’appropriation des itinéraires techniques agroforestiers. [less ▲]

Detailed reference viewed: 58 (9 ULiège)
Full Text
Peer Reviewed
See detailUtilisation des drones pour le suivi des aires protégées en RDC
Ngabinzeke, Jean Semeki; Vermeulen, Cédric ULiege; Linchant, Julie ULiege et al

in Cahiers Africains (2019), 93

Detailed reference viewed: 23 (7 ULiège)
Full Text
Peer Reviewed
See detailDo topography and fruit presence influence occurrence and intensity of crop-raiding by forest elephants (Loxodonta africana cyclotis)?
Ngama, Steeve ULiege; Bindelle, Jérôme ULiege; Poulsen, John R. et al

in PLoS ONE (2019), 14(3), 16

Crop damage by forest elephants (Loxodonta africana cyclotis) and the resulting human-elephant conflict are issues of great concern for both the conservation of the species and the protection of rural ... [more ▼]

Crop damage by forest elephants (Loxodonta africana cyclotis) and the resulting human-elephant conflict are issues of great concern for both the conservation of the species and the protection of rural livelihoods in Central Africa. Addressing these problems requires identifying the factors that facilitate or impede crop-raiding by forest elephants. Yet to date, the environmental or anthropogenic factors that influence the occurrence and intensity of cropraiding by forest elephants are largely unknown. We used a multivariate approach to investigate conditions under which forest elephants raid some fields and not others in the buffer zone of Monts de Cristal National Park (MCNP), Gabon. We first interviewed 121 farmers from 11 villages situated within 10 km of MCNP regarding the occurrence of elephant cropraiding of their fields. We then collected data on 39 explanatory variables to characterize the agricultural fields. Of these, the most important predictors of elephant raid occurrence of crop damage were presence of fruit trees, elephant deterrents (scarecrows, fire, wire string fences and empty barrels), and field topography. We secondly assessed the effect of stage of crop growth, presence of fruit trees, field topography and presence of elephant deterrents on crop-raiding occurrence and intensity by counting raids and measuring areas of crop damage every week in 17 plantations over 19 weeks in the most elephant-impacted zone of the study area. We found that fruit presence and stage of crop growth led to more intense damage to crops, whereas local deterrents did not inhibit raiding events and crop damage by elephants. We report a tradeoff between non-timber forest products (NTFP) services and crop-raiding by elephants. We show for the first time that steep topography impedes elephant damage to crops with no raids recorded in fields with surrounding slopes greater than 25%. We discuss whether farming on steep fields could be used as a strategy for mitigating crop-raiding to favor human-elephant coexistence and enhance elephant conservation. [less ▲]

Detailed reference viewed: 57 (5 ULiège)
Full Text
Peer Reviewed
See detailÉtat des connaissances sur les céphalophes (genres Cephalophus et Philantomba) des forêts denses humides d’Afrique centrale (synthèse bibliographique)
Houngbegnon, Fructueux ULiege; Sonké, Bonaventure; Vermeulen, Cédric ULiege et al

in Biotechnologie, Agronomie, Société et Environnement (2019)

Introduction. This article provides a synthesis of current knowledge on classification, ecology and biology of duikers living in central African rainforests (genera Cephalophus and Philantomba). It also ... [more ▼]

Introduction. This article provides a synthesis of current knowledge on classification, ecology and biology of duikers living in central African rainforests (genera Cephalophus and Philantomba). It also provides an update on the anthropogenic pressures on these terrestrial mammals. Literature. Many publications on central African duikers are focused on subsistence or commercial hunting, and poaching. As the taxonomic classification of duikers has recently been revised, new species have been described with very little information available on their ecology. This synthesis highlights the gaps in the scientific knowledge and proposes priority themes for future research. Conclusions. Although many aspects remain to be explored for some species (i.e., habitat use, home range), it is suggested to investigate in priority: the inventory methods, the role of duikers in forest dynamics, and the impact of logging on their populations. [less ▲]

Detailed reference viewed: 42 (14 ULiège)
Full Text
See detailEcosystem services assessment in Southeast Cameroon tropical forests
Lhoest, Simon ULiege; Dufrêne, Marc ULiege; Jamar, Pierre et al

Scientific conference (2019, March 11)

Detailed reference viewed: 18 (4 ULiège)
Full Text
See detailMaitrises foncières dans les mangroves : un point de départ pour la gestion communautaire ?
Vermeulen, Cédric ULiege

Conference (2019, February)

Est-il possible de fonder une gestion communautaire de la mangrove sur des maitrises foncières coutumières propres aux communautés locales ?

Detailed reference viewed: 17 (1 ULiège)
Full Text
See detailConservation value of protected and logged tropical forests in Cameroon
Lhoest, Simon ULiege; Fonteyn, Davy ULiege; Daïnou, Kasso ULiege et al

Scientific conference (2019, January 25)

Detailed reference viewed: 15 (3 ULiège)
Full Text
See detailPotentiel, efficacité et limites de la foresterie participative
Vermeulen, Cédric ULiege

Conference (2018, December)

Detailed reference viewed: 17 (0 ULiège)
Full Text
See detailAssessment of mammal biodiversity and bushmeat offtake in the tropical forests of southeastern Cameroon
Lhoest, Simon ULiege; Fonteyn, Davy ULiege; Hette, Samuel et al

Poster (2018, November 27)

Tropical forests of central Africa host an important part of the world’s terrestrial biodiversity and provide numerous provisioning, regulating, and cultural ecosystem services to human populations. Major ... [more ▼]

Tropical forests of central Africa host an important part of the world’s terrestrial biodiversity and provide numerous provisioning, regulating, and cultural ecosystem services to human populations. Major threats hang over those diverse ecosystems, namely land use changes and consumption of bushmeat. Our study aimed to assess mammal diversity and bushmeat consumption in three contrasted and largely represented forest land allocation types in southeastern Cameroon: (i) a protected area, (ii) a FSC-certified logging concession, and (iii) three community forests. Mammal inventories were conducted with 44 camera traps installed for 3 months. Bushmeat consumption was quantified using both tracking of volunteer hunters over 651 kilometers and the daily monitoring of the food bowl of 55 households for 3 months. Though a great part of the mammal diversity is retained inside the logging concession, the protected area holds the richest and most abundant mammal communities, whereas community forests were found to be defaunated and structurally disturbed. The size of the hunting territories is influenced by many factors such as human population density or the presence of alternative protein sources. Although poaching controls in the protected area and, to a lesser extent, in the certified logging concession appear to play a deterrent role, evidence of hunting activities were found in all land allocation types. Bushmeat represents on average 56% of the animal protein consumed by households, the remaining part being mainly fish. Our results demonstrated the ability of the certified logging concession and the protected area in the conservation of wildlife species and the provision of bushmeat for local populations. It remains essential to maintain and develop anti-poaching patrols in those areas, strategically based on geographic data of hunting pressure. Current levels of hunting activities also confirm the need for the development of alternatives to bushmeat. [less ▲]

Detailed reference viewed: 68 (13 ULiège)
Full Text
Peer Reviewed
See detailUAS imagery reveals new survey opportunities for counting hippos
Linchant, Julie ULiege; Lhoest, Simon ULiege; Quevauvillers, Samuel ULiege et al

in PLoS ONE (2018), 13(11), 0206413

Introduction The common hippopotamus Hippopotamus amphibius L. is a vulnerable species that requires efficient methods to monitor its populations for conservation purposes. Rapid evolution of civil drones ... [more ▼]

Introduction The common hippopotamus Hippopotamus amphibius L. is a vulnerable species that requires efficient methods to monitor its populations for conservation purposes. Rapid evolution of civil drones provides new opportunities but survey protocols still need development. This study aims to determine the optimal flight parameters for accurate population estimates. A second objective is to evaluate the effects of three environmental factors: wind speed, sun reflection and cloud cover. Method We estimated the population of two main hippo schools (Dungu and Wilibadi II) located in Garamba National Park in Democratic republic of Congo. Eight observers reviewed 252 photos taken over the Dungu school, representing a total of 2016 experimental units. A detection rate and a level of certainty were associated with each experimental unit, and five parameters were related to each count: flight height, three environmental parameters (sun reflection on water surface, cloud cover, and wind speed), and observers’ experience. Results Flight height reduced the observers’ confidence in their detection ability, rather than the detection itself. For accurate counts of large groups an average height of 150 m was shown to be a good compromise between animal detection without zooming in and the area covered in one frame. Wind speed had little influence on the counts, but it affected the performance of the UAS. Sun reflection reduced the detection rate of hippos and increased level of certainty, while cloud cover reduced detection rates slightly. Therefore, we recommend flying when the sun is still low on the horizon and when there is little cloud, or when cloud cover is light and even. This last point reinforces our recommendation for flights early in the day. The counts also showed large differences between groups of inexperienced and experienced observers. Experienced observers achieved better detection rates and were generally more confident in their detection. Experienced observers detected 86.5% of the hippos on average (confidence interval = ±0.76%). When applied to data from the second site, the detection was 84.3% (confidence interval = ±1.84%). Two correction factors were then calculated, as the inverse of the detection rate, based on the estimated number of hippos present during one flight (Factor 1) or in the general population respectively (Factor 2). Factor 2 especially was consistent with previous studies using traditional aerial counts (1.22 vs 1.25). Factor 2 was found to be appropriate for use by experienced observers. These results confirm the use of correction factor 2 for hippo surveys, regardless of the study site, as it accounts for hippo behavior. Optimum counting and cost efficiency were achieved with two trained observers counting 7 pictures. Conclusion This study is a promising approach for routine surveys of the hippopotamus which is a species usually ignored in wildlife counts. Drone technology is expected to improve rapidly; therefore UAS could become a very useful and affordable survey tool for other species requiring specific monitoring. [less ▲]

Detailed reference viewed: 204 (75 ULiège)
Full Text
See detailForêts, services écosystémiques et produits forestiers non-ligneux
Verheggen, François ULiege; Lhoest, Simon ULiege; Hette, Samuel et al

Learning material (2018)

Detailed reference viewed: 11 (2 ULiège)
See detailLa maquette interactive, un outil de représentation des enjeux autour de la mangrove
Vermeulen, Cédric ULiege

Conference (2018, October 01)

Detailed reference viewed: 26 (1 ULiège)
Full Text
See detailCompte-rendu de l’état des lieux des initiatives en cours d’exécution qui contribuent à la Feuille de Route
Haurez, Barbara; Bracke; Vermeulen, Cédric ULiege

Conference (2018, May 30)

Detailed reference viewed: 20 (5 ULiège)