References of "Claessens, Hugues"
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See detailThe critical role of abiotic factors and human activities in the supply of ecosystem services in the ES matrix
Maebe, Laura ULiege; Claessens, Hugues ULiege; Dufrêne, Marc ULiege

in One Ecosystem (2019), 4

In Western Europe, ecosystems have been shaped to maximise the supply of one specific biomass provisioning ecosystem service (ES), such as food or timber, with detrimental impacts on other ES. The ES ... [more ▼]

In Western Europe, ecosystems have been shaped to maximise the supply of one specific biomass provisioning ecosystem service (ES), such as food or timber, with detrimental impacts on other ES. The ES approach has therefore been established to better understand the multiple interactions between human society and ecosystems. A variety of methods have been developed to assess ES and their relationships, for instance the ES matrix model based on land cover classes. This popular, flexible and simple method allows combining different data sources and easily comparing ES. However, in general, this method poorly takes into account landscape heterogeneity while abiotic factors and human activities seem to play an important role in ES supply. The objective of this paper is twofold: (1) to extent the methodology based on the ES matrix model by including abiotic factors and human activities and (2) to test the impacts of these two types of factors on ES supply and their relationships. The assessment focused on the capacity of the forest to supply six ES depending on six types of soil ranging from productive soils to more constraining or less productive soils (i.e. abiotic factors) and two contrasting forest management strategies (i.e. human activities). This amended ES matrix was applied on one hand, to map the supply of ES and their relationships in four municipalities in the Ardenne ecoregion (Southern Belgium) and on the other hand, to investigate the impacts of three scenarios (i.e. three different management strategies) on ES supply and their relationships. The amended ES matrix shows large differences in ES supply between the two forest management strategies on the more constraining and less productive soils, creating differences in the spatial pattern of ES. The changes in ES supply amongst the three scenarios and the current supply were quantified to identify the best management options. In conclusion, one particular forest is not like another in terms of ES supply and their relationships. To capture this heterogeneity, we propose an amended ES matrix including abiotic factors and human activities. The maps, based on this matrix, allow identifying the hotspots (i.e. high capacity to supply different ES) and coldspots (i.e. low capacity to supply different ES or strong trade-offs between provisioning ES and regulating/cultural ES). Forest management should be adapted to the abiotic conditions, in particular in the coldspots, to ensure a more balanced supply of ES. [less ▲]

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See detailTransforming even-aged coniferous stands to uneven-aged stands: an opportunity to increase tree species diversity?
Ligot, Gauthier ULiege; Balandier, Philippe; Schmitz, Sophie et al

Conference (2019, March)

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See detailDu modèle mathématique à l'action de terrain
Perin, Jérôme ULiege; Claessens, Hugues ULiege; Hebert, Jacques ULiege

in Forêt.Nature (2019)

En Wallonie, les plantations résineuses représentent environ 43% de la surface des forêts et fournissent annuellement plus de 3 millions de m3 de bois, soit plus du double de nos forêts indigènes ... [more ▼]

En Wallonie, les plantations résineuses représentent environ 43% de la surface des forêts et fournissent annuellement plus de 3 millions de m3 de bois, soit plus du double de nos forêts indigènes (feuillues). La plupart sont des peuplements de production intensive de bois destiné à une industrie spécifique : sciages pour la construction essentiellement, ainsi que des sous-produits pour les panneaux, le papier et l’énergie. Dans ces conditions, l’administration forestière vise à optimiser ses méthodes de production. [less ▲]

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See detailÉvaluer le niveau de productivité des peuplements forestiers
Perin, Jérôme ULiege; Claessens, Hugues ULiege; Hebert, Jacques ULiege

in Forêt.Nature (2019)

Estimer le niveau de productivité d’un peuplement forestier est une démarche fondamentale pour guider le choix d’un itinéraire sylvicole. Les gestionnaires forestiers peuvent désormais facilement calculer ... [more ▼]

Estimer le niveau de productivité d’un peuplement forestier est une démarche fondamentale pour guider le choix d’un itinéraire sylvicole. Les gestionnaires forestiers peuvent désormais facilement calculer l’indice de productivité des futaies pures équiennes grâce à l’outil en ligne « H50 ». [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 detailLa télédétection 3D pour le monitoring régional des cours d’eau et des bandes riveraines associées en Wallonie (Belgique)
Michez, Adrien ULiege; Lejeune, Philippe ULiege; Claessens, Hugues ULiege et al

in Vivier, A; Breton, L; Grivel, S (Eds.) et al Avancées, apports et perspectives de la télédétection pour la caractérisation physique des corridors fluviaux - Actes de la journée technique (2018, March 01)

The Walloon administration has initiated a process of reform of river management policies, notably through the project PARIS action programs. The PARIS programs aim the integration in time and space of ... [more ▼]

The Walloon administration has initiated a process of reform of river management policies, notably through the project PARIS action programs. The PARIS programs aim the integration in time and space of all specific management measures regarding public waterways based on priority issues identified at the level of homogeneous management units (6185 units, with mean length of 2 km). The implementation and monitoring of these management plans involve the development of effective monitoring tools to establish the initial state, planning acts of management and evaluating the effectiveness of such management plans. These operations must be carried out on nearly 12,000 km of streams and associated riparian area. This task must be realized on an objective and common basis for all of public waterways managers. Fine remote sensing data’s are available and regularly acquired by the Walloon administration. Derived solutions of these data sources will partially meet the information needs of PARIS management plans at reduced cost. To achieve this goal, a protocol has been established based on lidar point clouds (density 1 point «soil»/m2) completed by photogrammetric points clouds. These data were used to characterize the spatial structure of riparian areas associated with all of the Walloon public water system (>12,000 km) through six parameters. These parameters can be hydromorphological (height of banks, width, and sinuosity of the riverbed), or describe the structure of riparian forests (average height, longitudinal continuity, and shading of the riverbed). Different types of visualizations can support management decision-making to the local level (single river management unit) to regional (354 waterbodies of the water framework directive). Through various visualizations at different scales, the extracted parameters by the project will be integrated into a webGIS platform used by the river managers to report and plan their management actions. [less ▲]

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See detailLe Hêtre face au changement climatique : le cas de la Belgique
Latte, Nicolas ULiege; Lebourgeois, François; Kint, Vincent et al

in Revue Forestière Française (2018), 69(3), 205-218

This article explores the relationship between beech (Fagus sylvatica L.) and its environment on the scale of Belgium. Radial increment is used to assess the effects of global change, particularly climate ... [more ▼]

This article explores the relationship between beech (Fagus sylvatica L.) and its environment on the scale of Belgium. Radial increment is used to assess the effects of global change, particularly climate change, on the development and vitality of beech since the beginning of the 20th century. The average radial increment of beech on the scale of Belgium has decreased while its variability has increased. Climate has had a growing influence on growth and has become the predominant factor since the beginning of the 1990’s. The increments of all trees have become synchronised mainly due to the increase in frequency and intensity of summer heat waves and spring droughts. The results are interpreted on the basis of knowledge about the ecophysiology of beech and the consequences of current and future climate change are discussed. [less ▲]

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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 detailTransforming even-aged coniferous stands to uneven-aged stands: an opportunity to increase tree species diversity?
Ligot, Gauthier ULiege; Rozet, Sevan; Claessens, Hugues ULiege

Conference (2018)

In the hope of increasing forest adaptability, there is a growing interest in converting coniferous even-aged stands to uneven-aged stands. While the former silviculture has a long tradition, the latter ... [more ▼]

In the hope of increasing forest adaptability, there is a growing interest in converting coniferous even-aged stands to uneven-aged stands. While the former silviculture has a long tradition, the latter as well as the conversion between the two systems remain complex and far less documented. Depending on the proximity of seed bearers of different species, the seedling diversity can be important, offering good opportunities to increase future tree diversity. Nevertheless, with continuous cover forestry that limits forest perturbations, there is a fear that only a few late-successional vigorous species and eventually limit future stand diversity. Nine 1-ha permanent plots have been established in even-aged coniferous stands managed to progressively convert them to uneven-aged stands. The stands were chosen to span contrasted forest composition and a gradient of stand ages at the beginning of the conversion from even-aged to uneven-aged. Twelve subplots were installed in each plot to monitor the natural regeneration and light conditions using hemispherical photography. In contrast to the regeneration density and diversity, the height growth rate of dominant saplings was well related to light conditions. In similar light conditions, saplings of Norway spruce, Douglas fir and European silver fir showed relatively similar height increments, while, in some plots, saplings of Western hemlock and larch had higher height growth rate and might threaten future stand diversity. [less ▲]

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See detailPremière Charte forestière : comment l’approche des services écosystémiques informe une gestion multifonctionnelle
Maebe, Laura ULiege; Claessens, Hugues ULiege; Dufrêne, Marc ULiege

Article for general public (2018)

La révélation des services écosystémiques (SE), c’est-à-dire l’ensemble des bienfaits que l’humanité tire de la nature (par exemple le bois, la pollinisation ou la récréation en nature), constitue une ... [more ▼]

La révélation des services écosystémiques (SE), c’est-à-dire l’ensemble des bienfaits que l’humanité tire de la nature (par exemple le bois, la pollinisation ou la récréation en nature), constitue une approche prometteuse pour mettre en évidence les multiples interactions entre l’environnement et les sociétés humaines ainsi qu’entre les acteurs. Elle révèle les coûts et bénéfices cachés des actions humaines et met en balance les intérêts individuels et collectifs pour une gestion durable, multifonctionnelle et résiliente des écosystèmes. Dans ce but, une plateforme wallonne sur les services écosystémiques (Wal-ES) a été mise en place pour incorporer cette approche dans les outils territoriaux d’aide à la décision (Wal-ES, 2016). L’approche des SE, développée par Wal-ES, a été appliquée au projet de « Première Charte forestière du territoire » mis en place par l’asbl Ressources Naturelles Développement8. Ce projet vise à donner à la « Grande forêt de Saint-Hubert » une place au sein du territoire tout en assurant sa multifonctionnalité au profit de l’ensemble des acteurs. Dans ce cadre, une cartographie des services rendus par cette forêt a été réalisée. Un niveau de 0 (fourniture minimale) à 6 (fourniture maximale) a été attribué à chaque service en fonction, d’une part, du type de forêt et d’autre part, du type de contexte écologique en différenciant les bons sols des sols peu fertiles ou contraignants. Cette cartographie a mis en évidence les zones pour lesquelles les services pouvaient être améliorés, c’est-à-dire celles de faibles fournitures en SE ou présentant un déséquilibre entre les intérêts individuels et collectifs. Afin d’évaluer l’impact de méthodes de gestion alternatives sur les services, trois scénarios ont été testés. Ce test a permis d’identifier les méthodes de gestion les plus appropriés pour assurer une fourniture diverse et équilibrée en services par la forêt, gage de sa multifonctionnalité et de sa durabilité. [less ▲]

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See detailAgroforestry for ruminants: a review of trees and shrubs as fodder in silvopastoral temperate and tropical production systems
Vandermeulen, Sophie ULiege; Ramirez Restrepo, Carlos; Beckers, Yves ULiege et al

in Animal Production Science (2018), 58

Among the oldest agroforestry systems, silvopastoralism uses shrubs and trees to feed ruminants. The practice is common in extensive livestock production systems, while the intensification of grass-based ... [more ▼]

Among the oldest agroforestry systems, silvopastoralism uses shrubs and trees to feed ruminants. The practice is common in extensive livestock production systems, while the intensification of grass-based systems in the past century has led to the removal of woody species from agricultural temperate landscapes. In Europe however, woody species are promoted again on grasslands through environment-friendly policies due to the ecosystem services they provide such as carbon sequestration, control of soil erosion, limitation of air-borne pollutants and biodiversity conservation. Positive effects of browse on rumen digestion and parasite control have also been documented across different plant species and regions. Under optimal conditions, feeding ruminants from woody fodder sustains animal production. Nonetheless, limitations can restrict the use of woody forage into animal diets, such as the presence of anti-nutritive and toxic compounds. The incorporation of this resource in ruminant feeding systems raises the question of the management of the interface between the plant and the animal. Various management systems are practiced. Temperate species such as Salix spp. and Populus spp. are fed to sheep and cattle in fodder blocks or by pruning trees in New Zealand, and Fraxinus spp. or Corylus avellana in hedgerows supply forage to livestock in Belgium, while Leucaena leucocepahala and Desmanthus spp. browsing is common in Australia. Nowadays, ensiling and pelleting techniques are being developed as a way to store browse forage. As the renewed interest in using shrubs and trees to feed ruminants is recent, especially in temperate regions, additional research about introducing optimally this resource within systems is needed. [less ▲]

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See detailSoft Skills: how to make the young engineers aware of their new talents?
Colaux, Catherine ULiege; Beckers, Yves ULiege; Brostaux, Yves ULiege et al

in Stanzione, Joseph; Savelski, Mariane (Eds.) Creating the holistic engineer (2018)

The competency framework attached to the Life science engineering Master at Gembloux Agro-Bio Tech, University of Liege (Belgium) is composed of technical and scientific skills but also soft skills which ... [more ▼]

The competency framework attached to the Life science engineering Master at Gembloux Agro-Bio Tech, University of Liege (Belgium) is composed of technical and scientific skills but also soft skills which are not connected to academic courses. For the training of these skills, university needs the collaboration of the professional world. Therefore, the role of our teachers evolves towards a guiding or mentoring role. They will help students to analyse their professional experiences in order to shape their professional identity, to bring to light their acquired skills. This article describes how the portfolio, used as internship’s report, will help students to gain the self-confidence about their abilities and how professors can use these reflexive analyses to evaluate the acquisition of these soft skills. [less ▲]

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See detailCuriosité : le « curly birch ». Une figuration ondée, rare et recherchée du bois de bouleau
Dubois, Héloïse ULiege; Layon, José; Claessens, Hugues ULiege

in Forêt.Nature (2017), (145), 12-15

Nos forêts et leur gestion doivent s’adapter à de grands changements, qu’ils soient climatiques, socio-économiques ou sanitaires. De ce point de vue, le bouleau possède de nombreux atouts, tant en termes ... [more ▼]

Nos forêts et leur gestion doivent s’adapter à de grands changements, qu’ils soient climatiques, socio-économiques ou sanitaires. De ce point de vue, le bouleau possède de nombreux atouts, tant en termes écologiques qu’économiques et sylvicoles. De plus en plus abondant en Europe occidentale, il deviendra à l’avenir un facteur déterminant des décisions sylvicoles. Une recherche approfondie sur l’intérêt de l’essence pour la gestion forestière, ses filières économiques, sa croissance et, surtout, la sylviculture à lui apporter, est en cours à Gembloux Agro-Bio Tech (Liège Université) avec le financement de l’Accord-cadre de recherches et vulgarisation forestières. Elle a notamment été l’occasion de riches échanges avec la Finlande, pays le plus boisé d’Europe. Le bouleau y est une composante très importante des forêts, de l’économie du pays, de la construction et de l’ameublement. Cet article constitue un détour original afin de présenter une figuration rare du bois de bouleau, qui amusera les passionnés du bois et les curieux. Il s’agit du « curly birch », littéralement le « bouleau ondé », actuellement anecdotique mais très lucratif. [less ▲]

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See detailMulti-temporal monitoring of a regional riparian buffer network (>12,000 km) with LiDAR and photogrammetric point clouds
Michez, Adrien ULiege; Piégay, Hervé; Lejeune, Philippe ULiege et al

in Journal of Environmental Management (2017), 202(2), 424-436

Riparian buffers are of major concern for land and water resource managers despite their relatively low spatial coverage. In Europe, this concern has been acknowledged by different environmental ... [more ▼]

Riparian buffers are of major concern for land and water resource managers despite their relatively low spatial coverage. In Europe, this concern has been acknowledged by different environmental directives which recommend multi-scale monitoring (from local to regional scales). Remote sensing methods could be a cost-effective alternative to field-based monitoring, to build replicable “wall-to-wall” monitoring strategies of large river networks and associated riparian buffers. The main goal of our study is to extract and analyze various parameters of the riparian buffers of up to 12,000 km of river in southern Belgium (Wallonia) from three-dimensional (3D) point clouds based on LiDAR and photogrammetric surveys to i) map riparian buffers parameters on different scales, ii) interpret the regional patterns of the riparian buffers and iii) propose new riparian buffer management indicators. We propose different strategies to synthesize and visualize relevant information at different spatial scales ranging from local (<10 km) to regional scale (>12,000 km). Our results showed that the selected parameters had a clear regional pattern. The reaches of Ardenne ecoregion have channels with the highest flow widths and shallowest depths. In contrast, the reaches of the Loam ecoregion have the narrowest and deepest flow channels. Regional variability in channel width and depth is used to locate management units potentially affected by human impact. Riparian forest of the Loam ecoregion is characterized by the lowest longitudinal continuity and mean tree height, underlining significant human disturbance. As the availability of 3D point clouds at the regional scale is constantly growing, our study proposes reproducible methods which can be integrated into regional monitoring by land managers. With LiDAR still being relatively expensive to acquire, the use of photogrammetric point clouds combined with LiDAR data is a cost-effective means to update the characterization of the riparian forest conditions. [less ▲]

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See detailÉtude de la disponibilité des cavités pour les oiseaux cavernicoles dans la Région de Bruxelles-Capitale
Debois, Caroline; Claessens, Hugues ULiege; Paquet, Jean-Yves et al

in Forêt.Nature (2017), (144), 11-20

Selon une étude effectuée en 2002, le nord-ouest de Bruxelles possède une grande disponibilité en cavités pour les oiseaux cavernicoles malgré le fort développement depuis plusieurs décennies de deux ... [more ▼]

Selon une étude effectuée en 2002, le nord-ouest de Bruxelles possède une grande disponibilité en cavités pour les oiseaux cavernicoles malgré le fort développement depuis plusieurs décennies de deux perruches exotiques : la perruche à collier et la perruche alexandre. Suite à l’augmentation des effectifs des deux populations de perruches et suite au renouvellement des vieux peuplements forestiers bruxellois, une limitation du nombre de cavités disponibles pour la nidification des oiseaux cavernicoles est désormais possible. Une nouvelle étude a dès lors été réalisée sur l’ensemble des zones boisées de la Région de Bruxelles-Capitale à l’aide d’un réseau de placettes circulaires disposé aléatoirement dans trois zones distinctes. Dans ces placettes, un inventaire des arbres et des cavités a été effectué avant la période de feuillaison. Par la suite, l’occupation des cavités par les oiseaux cavernicoles a été déterminée. D’après les résultats, un grand nombre de cavités restent disponibles pour la nidification à Bruxelles comme cela avait été établi précédemment. Cela est confirmé par le peu d’interactions observées entre les espèces et par les tendances des populations de cavernicoles, qui sont stables ou en augmentation à Bruxelles de 1992 à 2015. [less ▲]

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See detailDistance-independent tree basal area growth models for Norway spruce, Douglas-fir and Japanese larch in Southern Belgium
Perin, Jérôme ULiege; Claessens, Hugues ULiege; Lejeune, Philippe ULiege et al

in European Journal of Forest Research (2017), 136(2),

This paper presents new harmonized distance independent individual tree basal area growth models for Norway spruce, Douglas-fir and Japanese larch in pure even-aged stands in Southern Belgium. The ... [more ▼]

This paper presents new harmonized distance independent individual tree basal area growth models for Norway spruce, Douglas-fir and Japanese larch in pure even-aged stands in Southern Belgium. The selected model was originally developed for Norway spruce and Douglas-fir in neighbouring France. New formulations are proposed for some of the model components in order to lower the number of fitted parameters and facilitate the fitting procedure. The resulting models integrate the most recent corresponding top-height growth models and use 4 simple and usually collected explanatory variables : stand age, top-height, total basal area and tree girth at breast height. The modified formulations maintain similar fitting performances and make it easier to interpret the influence of the explanatory variables on tree growth. Parameters estimates were fitted on thousands of growth measurements gathered from several monitoring plots, forest management inventories and silvicultural field experiments that represent the wide range of site conditions and of forest management scenarios applied to coniferous stands in Southern Belgium. Cross-validation of the models revealed no bias and highlighted their consistent behaviour over the entire range of girth at breast height, age, top-height, site index and density represented in our dataset. Combining utility and robust performances, these models represent useful forest management tools, purposely ideal for forest simulation software development. Moreover, the flexibility and generic capabilities of the model formulation should make it easily adjustable for other species in even-aged stands. [less ▲]

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See detailLe Fichier écologique des essences, version 2.0
Petit, S.; Claessens, Hugues ULiege; Vincke, C. et al

in Forêt.Nature (2017), (143), 12-19

Après plus de 25 ans d’utilisation, le Fichier écologique des essences méritait une révision en profondeur. Il a été remis au goût du jour grâce à l’Accord-cadre de recherches et vulgarisation forestières ... [more ▼]

Après plus de 25 ans d’utilisation, le Fichier écologique des essences méritait une révision en profondeur. Il a été remis au goût du jour grâce à l’Accord-cadre de recherches et vulgarisation forestières et par les équipes de recherches de l’Ulg-GxABT et de l’UCL, avec l’appui de Forêt Wallonne. Fruit d’une collaboration entre chercheurs et gestionnaires de terrain, il repose sur un large travail de recherche bibliographique, adapté au contexte wallon grâce aux membres d’un groupe de travail composé de scientifiques et de forestiers. Il a évolué pour répondre aux attentes de la société et prône une forêt multifonctionnelle et résiliente face aux changements climatiques. Disponible sous format web, il facilite la prise en main par les utilisateurs et les guide vers la meilleure adaptation entre les essences et les stations, gage d’un écosystème pleinement fonctionnel, résilient et répondant aux besoins actuels de la société. [less ▲]

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See detailCartographie de la disponibilité en eau et en éléments nutritifs des stations forestières de Wallonie
Wampach, Florent ULiege; Lisein, Jonathan; Cordier, Sophie ULiege et al

in Forêt.Nature (2017), avril-mai-juin(143), 47-60

Grâce aux données cartographiques de plus en plus nombreuses et disponibles, il est maintenant possible d'analyser l'adéquation essence-station à l'échelle d'un massif ou d'un cantonnement. A l'échelle ... [more ▼]

Grâce aux données cartographiques de plus en plus nombreuses et disponibles, il est maintenant possible d'analyser l'adéquation essence-station à l'échelle d'un massif ou d'un cantonnement. A l'échelle plus locale, cette nouvelle cartographie constitue un outil d'aide à l'interprétation des stations pour les gestionnaires, forestiers ou naturalistes. [less ▲]

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See detailLes peuplements à bouleau en forêt wallonne: reflet de la sylviculture du 20ème siècle
Dubois, Héloïse ULiege; Latte, Nicolas ULiege; Claessens, Hugues ULiege

in Forêt.Nature (2017), 142

Le bouleau est présent sous des formes diverses dans nos forêts. La place qu’il occupe en forêt wallonne est souvent le reflet d’une méconnaissance et du peu d’estime que lui portaient les sylviculteurs ... [more ▼]

Le bouleau est présent sous des formes diverses dans nos forêts. La place qu’il occupe en forêt wallonne est souvent le reflet d’une méconnaissance et du peu d’estime que lui portaient les sylviculteurs. Par une typologie des peuplements, l’article fait le tri parmi les contextes où se trouve le bouleau et discute de leurs potentialités sylvicoles dans un contexte changeant qui pourrait faire la part belle à cette essence vigoureuse et aux atouts variés. [less ▲]

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See detailEffects of the conversion of intensive grasslands into Christmas tree plantations on bird assemblages
Gailly, Robin ULiege; Paquet, Jean-Yves; Titeux, Nicolas et al

in Agriculture, Ecosystems and Environment (2017), 247

Over the last decade, the conversion of annual-rotation based crops or grassland areas into non-food perennial crops has been increasingly prevalent in European farming systems. This shift is associated ... [more ▼]

Over the last decade, the conversion of annual-rotation based crops or grassland areas into non-food perennial crops has been increasingly prevalent in European farming systems. This shift is associated with major changes in management practices and has created new environmental conditions and resources for wildlife. Impacts on birds have been examined for bioenergy agricultural systems, such as miscanthus plantations and short-rotation willow coppice. However, they remain largely unknown for Christmas tree plantations (CTPs) that have recently increased considerably in some European countries. We examined the extent to which CTPs alter bird species assemblages in the farmland areas of southern Belgium, where they mainly replace intensive grassland. The abundance of birds was recorded during the breeding season in randomly selected sites located in grassland and in CTP. Results show that introduction of CTP into landscapes dominated by grassland with low hedge densities locally increases bird species richness and abundance without leading to biotic homogenization. Differences in species richness and abundance between grassland and CTP decrease with increasing hedge densities. A community analysis indicates that the plantation of Christmas trees enriches the bird assemblage of intensive grassland areas. In intensive grassland with few hedges, small-size CTPs could constitute an option to increase structural heterogeneity and provide new potential breeding conditions for some farmland birds. However, questions remain about the genuine quality of the resources available in CTP and further research is needed to examine the breeding success and survival of birds that settle in this type of habitat. [less ▲]

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