References of "Dufrêne, Marc"
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See detailHigh resolution mapping of population change in breeding birds in Wallonia (Southern Belgium)
Coppee, Thomas ULiege; Paquet, Jean-Yves; Dufrêne, Marc ULiege

Conference (2019, April 09)

Patterns of fine-scale change in bird abundance across different landscapes may inform about the driving forces behind bird communities evolution. We compare km²-resolution map of breeding birds in ... [more ▼]

Patterns of fine-scale change in bird abundance across different landscapes may inform about the driving forces behind bird communities evolution. We compare km²-resolution map of breeding birds in Wallonia (Southern Belgium) at 10 years interval. The maps are based on repeated sampling transects conducted inside a km²-grid. Spatial modelling techniques were applied on these two dataset using environmental variables produced by the LifeWatch-WB Project. Variables are issued from pixel-based land cover classification of orthophoto mapping and satellite images, with a resolution of 2 meters and are available for the two periods corresponding to bird data. Others variables included in the model are climatic, topographic or soil attributes. For each bird species, spatial models built with data from the first period are projected with the value of the environmental variables for the more recent period, and viceversa. Moreover, another method is to compare models built independently on the two periods. Modelling methods mainly are of two types: Generalized Additive Model (GAM) and RandomForest. Comparison between prediction and real data at the km² level offers insight about the causes of change in bird populations. [less ▲]

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See detailEcosystem services assessment in Southeast Cameroon tropical forests
Lhoest, Simon ULiege; Dufrêne, Marc ULiege; Jamar, Pierre et al

Scientific conference (2019, March 11)

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See detailImproving Ecotope Segmentation by Combining Topographic and Spectral Data
Radoux, Julien; Bourdouxhe, Axel ULiege; Coos, William et al

in Remote Sensing (2019), 11

Ecotopes are the smallest ecologically distinct landscape features in a landscape mapping and classification system. Mapping ecotopes therefore enables the measurement of ecological patterns, process and ... [more ▼]

Ecotopes are the smallest ecologically distinct landscape features in a landscape mapping and classification system. Mapping ecotopes therefore enables the measurement of ecological patterns, process and change. In this study, a multi-source GEOBIA workflow is used to improve the automated delineation and descriptions of ecotopes. Aerial photographs and LIDAR data provide input for landscape segmentation based on spectral signature, height structure and topography. Each segment is then characterized based on the proportion of land cover features identified at 2 m pixel-based classification. The results show that the use of hillshade bands simultaneously with spectral bands increases the consistency of the ecotope delineation. These results are promising to further describe biotopes of high ecological conservation value, as suggested by a successful test on ravine forest biotope. [less ▲]

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See detailTOURISME, BIODIVERSITE ET BIEN-ETRE
Breyne, Johanna ULiege; Dufrêne, Marc ULiege

Conference given outside the academic context (2019)

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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)

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See detailFlexible habitat use of stonechats Saxicola torquatus dealing with different anthropogenic novel environments
Gailly, Robin ULiege; Cousseau, Laurence; Titeux, Nicolas et al

Conference (2018, December 15)

Organisms may respond to rapid human induced environmental changes by adapting their habitat requirements through behavioural flexibility. In human-modified landscapes from southern Belgium, recent ... [more ▼]

Organisms may respond to rapid human induced environmental changes by adapting their habitat requirements through behavioural flexibility. In human-modified landscapes from southern Belgium, recent management activities have generated structurally different and novel land-use types that are now occupied by a number of farmland bird species. However, as birds rely on environmental cues to select their habitat, they can be subject to maladaptive habitat selection if these cues become uncoupled from the underlying habitat quality. We therefore used the European Stonechat Saxicola torquatus as a model species to compare the relative attractiveness and breeding quality of the three main land-use types occupied by farmland birds (i.e. intensive grassland, Christmas tree plantations and clear-cut patches in plantation forests) in order to test whether habitat selection is adaptive in a changing landscape. Between 2014 and 2018, we examined the settlement pattern of territorial males to measure habitat preference and we recorded key parameters reflecting reproductive performances and individual survival to assess the quality of the three land-use types for the reproduction of the stonechats. Our results indicate that stonechats preferentially settle in clear-cut patches where they produce lower-quality offspring due to a gradual decrease of nestling body conditions during the breeding season. However, we found that this has no consequence on recruitment rates, because first-year survival was not related to nestling body conditions in our study system. As other parameters of reproductive performances, adult survival and first-year survival were similar between the three land-use types, we concluded that stonechats are capable of flexible habitat use and may find breeding opportunities of similar quality in the three land-use types although these strongly differ in terms of vegetation structure and management. Moreover, our results highlight the importance of measuring multiple fitness components to assess habitat quality in a comprehensive way. [less ▲]

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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 ▲]

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See detailBalancing forest ecosystem services by adapting their management to the forest type and the ecological context: a case study in Southern Belgium
Maebe, Laura ULiege; Claessens, Hugues ULiege; Dufrêne, Marc ULiege

Conference (2018, October 16)

Trade-offs between wood production and other ecosystem services (ES) are common. Understanding these trade-offs is a first step to ensure a balanced supply of ES from forests to society. Only few studies ... [more ▼]

Trade-offs between wood production and other ecosystem services (ES) are common. Understanding these trade-offs is a first step to ensure a balanced supply of ES from forests to society. Only few studies, however, consider the influence of the management and the ecological context such as the topography or the type of soils on these trade-offs. We, therefore, assessed the impacts of management and the ecological context on the supply of ES and their trade-offs. The assessment focused on six ES (wood production, carbon sequestration, flood and erosion control, clean water, recreation) based on an improved Burkhard’s matrix (Burkhard et al., 2009). We considered two types of forest with contrasting management and six types of ecological context ranging from productive soils to more restrictive sites and less productive soils. This matrix was applied on one hand, to map the supply of ES in four municipalities in Southern Belgium and on the other hand, to investigate the impacts of three scenarios (i.e. three different management strategies) on them. The improved Burkhard’s matrix showed that the differences among ES vary depending on the forest type and the ecological context. Trade-offs appeared only in some combinations of forest and soil type. The maps of ES allowed identifying the hot (synergies between ES) and cold (trade-offs between ES) spots in the territory. The changes in ES supply among the three scenarios and the current supply were quantified to identify the best management options. In conclusion, a forest is not like another in terms of the trade-offs among ES. Depending on their type, ecological context and management strategy, they provide different sets of ES. This heterogeneity is important to map to identify the hot and cold spots and to take actions in these specific areas (i.e. the cold spots) to ensure a balanced supply of ES. [less ▲]

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See detailInterLIFE - 09/10/2018
Mercken, Kathleen ULiege; Sneessens, Alexandre; Maebe, Laura ULiege et al

Conference given outside the academic context (2018)

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See detailSpatio-temporal floral resource shifts in Belgium
Jacquemin, Floriane ULiege; Violle, Cyrille; Coppee, Thomas ULiege et al

Poster (2018, September 20)

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See detailA multi-stressor analysis of spatio-temporal shifts in Belgian bee community
Rollin, Orianne ULiege; Michez, Denis; Jacquemin, Floriane ULiege et al

Poster (2018, September 20)

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See detailThe role of bees in interaction networks with plants as a conservation argument
Jacquemin, Floriane ULiege; Violle, Cyrille; Munoz, François et al

Conference (2018, September 18)

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See detailLes services écosystémiques : Intérêts et application en contexte agricole
Maebe, Laura ULiege; Dufrêne, Marc ULiege

Conference given outside the academic context (2018)

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See detailContributions of Gembloux Agro Bio-Tech to LifeWatch Belgium
Bourdouxhe, Axel ULiege; Coppee, Thomas ULiege; Radoux, Julien et al

Poster (2018, January)

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See detailComment révéler les multiples rôles de la biodiversité pour le bien-être individuel et collectif ? Un appel pour relancer la plateforme wallonne sur les services écosystémiques
Maebe, Laura ULiege; Pipart, Nathalie; Dendoncker, Nicolas et al

Article for general public (2018)

Face au constat de la dégradation continue de la biosphère, le concept de services écosystémiques (i.e. ensemble des biens et services fournis par les écosystèmes ; SE) est de plus en plus mobilisé pour ... [more ▼]

Face au constat de la dégradation continue de la biosphère, le concept de services écosystémiques (i.e. ensemble des biens et services fournis par les écosystèmes ; SE) est de plus en plus mobilisé pour mettre en évidence la valeur des apports des écosystèmes à la vie humaine. Cette approche permet de révéler nos (inter)dépendances et interactions avec la nature, les coûts et bénéfices cachés de nos actions et de mettre en discussion les intérêts individuels et collectifs pour une gestion durable des écosystèmes. Dans ce contexte, une plateforme wallonne sur les services écosystémiques, nommée Wal-ES, a été mise en place en 2014. A l’interface entre le Service Public de Wallonie (SPW) et les universités wallonnes, Wal-ES vise à révéler l’importance du fonctionnement des écosystèmes pour intégrer l’approche des SE dans des outils d’aide à la décision. Financée seulement pendant une année, la plateforme n’a pu que mettre en place un cadre conceptuel et les bases communes devant servir ultérieurement à développer les outils d’aide à la décision. Toutefois, l’équipe scientifique a continué à mobiliser le concept dans deux projets de développement territorial. Le premier correspond à un aménagement foncier rural en Hesbaye où l’approche des SE a été mise en œuvre pour évaluer et développer la multifonctionnalité des paysages agricoles. Le second est le projet d'une première charte forestière sur quatre communes de la Grande Forêt de Saint-Hubert. Un diagnostic des services écosystémiques rendus par la forêt a été réalisé pour évaluer la répartition des services sur le territoire et préconiser des stratégies de gestion visant à en améliorer la fourniture. [less ▲]

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See detailSpatial diversification of agroecosystems to enhance biological control and other regulating services: An agroecological perspective
Hatt, Séverin ULiege; Boeraeve, Fanny ULiege; Artru, Sidonie ULiege et al

in Science of the Total Environment (2018), 621

Spatial diversification of crop and non-crop habitats in farming systems is promising for enhancing natural regulation of insect pests. Nevertheless, results from recent syntheses show variable effects ... [more ▼]

Spatial diversification of crop and non-crop habitats in farming systems is promising for enhancing natural regulation of insect pests. Nevertheless, results from recent syntheses show variable effects. One explanation is that the abundance and diversity of pests and natural enemies are affected by the composition, design and management of crop and non-crop habitats. Moreover, interactions between both local and landscape elements and practices carried out at different spatial scales may affect the regulation of insect pests. Hence, research is being conducted to understand these interdependencies. However, insects are not the only pests and pests are not the only elements to regulate in agroecosystems. Broadening the scope could allow addressing multiple issues simultaneously, but also solving them together by enhancing synergies. Indeed, spatial diversification of crop and non-crop habitats can allow addressing the issues of weeds and pathogens, along with being beneficial to several other regulating services like pollination, soil conservation and nutrient cycling. Although calls rise to develop multifunctional landscapes that optimize the delivery of multiple ecosystem services, it still represents a scientific challenge today. Enhancing interdisciplinarity in research institutions and building interrelations between scientists and stakeholders may help reach this goal. Despite obstacles, positive results from research based on such innovative approaches are encouraging for engaging science in this path. Hence, the aim of the present paper is to offer an update on these issues by exploring the most recent findings and discussing these results to highlight needs for future research. [less ▲]

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