References of "Ligot, Gauthier"
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See detailForest radiative transfer models: which approach for which application?
Ligot, Gauthier ULg; Balandier, Philippe; Courbaud, Benoît et al

in Canadian Journal of Forest Research = Journal Canadien de la Recherche Forestière (2014), 44(5), 385-397

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See detailModélisation de la dynamique des peuplements irréguliers
Ligot, Gauthier ULg

Scientific conference (2014, February 18)

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See detailANALYSE SPATIO-TEMPORELLE DES DÉGÂTS D’ÉCORCEMENT DANS LES PLANTATIONS RÉSINEUSES EN RÉGION WALLONNE
Ligot, Gauthier ULg; Lehaire, François ULg; Gheysen, Thibaut et al

in Forêt Wallonne (2013), 126

Les dégâts d’écorcement inquiètent de très nombreux gestionnaires forestiers. Depuis plus de 10 ans, des inventaires sont réalisés annuellement et des outils de diagnostic ont été développés afin d’en ... [more ▼]

Les dégâts d’écorcement inquiètent de très nombreux gestionnaires forestiers. Depuis plus de 10 ans, des inventaires sont réalisés annuellement et des outils de diagnostic ont été développés afin d’en quantifier l’ampleur en Région wallonne. L’examen de ces données met en évidence le rôle prépondérant des densités de cerfs ainsi que de la structure du paysage, de la rigueur des hivers et de la capacité d’accueil du milieu. [less ▲]

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See detailHeight competition between Quercus petraea and Fagus sylvatica natural regeneration in mixed and uneven-aged stands
Ligot, Gauthier ULg; Balandier, Philippe; Fayolle, Adeline ULg et al

in Forest Ecology & Management (2013), 304

We monitored in situ natural regeneration in 23 uneven-aged stands. We modelled height growth in the regeneration of Quercus petraea and Fagus sylvatica. Beech saplings grew faster than oak saplings at ... [more ▼]

We monitored in situ natural regeneration in 23 uneven-aged stands. We modelled height growth in the regeneration of Quercus petraea and Fagus sylvatica. Beech saplings grew faster than oak saplings at all light levels. Oak gained greater benefit from direct radiation than did beech. Canopy opening is insufficient to promote oak over beech regeneration. [less ▲]

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See detailBioindicators for measurement of red deer pressure on understory vegetation in temperate deciduous forests
Lehaire, François ULg; Morelle, Kevin ULg; Ligot, Gauthier ULg et al

Poster (2013, August)

During the last decades, populations of large herbivores have largely increased. Consequently, their pressure on forest vegetation has been exacerbated, reaching in some cases levels that reduced the ... [more ▼]

During the last decades, populations of large herbivores have largely increased. Consequently, their pressure on forest vegetation has been exacerbated, reaching in some cases levels that reduced the diversity of forest ecosystem services. Assessing the balance between timber production and hunting activities remains a crucial question for forest managers who hence need reliable tools such as ecological indicators. Our aim was to review ecological indicators that characterize the pressure of red deer (Cervus elaphus L.) on understory vegetation in temperate deciduous forest ecosystem. The choice of plants on which the variables are measured is crucial to accurately characterize the deer pressure. This choice must take into account the feeding behavior of red deer, silvicultural objectives, ease of the measurement and the occurrence of these plants within the studied habitat. Generally, it is more appropriate to use common species with a wide ecological amplitude. The choice of indicator plants must take into account plant abundance and palatability, as they both affects considerably the performance of the ecological indicator. The variability of indicators generally increases with the scarcity of the chosen indicator plant. Therefore, choosing abundant plant species appear often the best solution as the resulting have a lower variability and hence enable better to detect changes of deer pressure. At low herbivore pressure, palatable species to offer quick response to the pressure variations. Palatable species are therefore reliable plant indicator especially if these is a good balance between game population and forestry. At excessive herbivore pressure, non-palatable species are preferred. In this case, the variability of ecological indicator is smaller with non palatable plant than with palatable plant. Ecological indicators of deer pressure help to understand the relationships between biodiversity, carrying capacity and deer populations. They are intended to forest managers that would like to monitor red deer pressure in regards to forest management goals and forest sustainability. [less ▲]

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See detailSuivi de 27 régénérations de chêne sessile et de hêtre : résultats pour la période de 2007 à 2012
Ligot, Gauthier ULg; Mackels, Benoit ULg; Lehaire, François ULg et al

Report (2013)

En 2007, l’unité de Gestion des Ressources forestières et des Milieux naturels de la Faculté Universitaire des Sciences Agronomique de Gembloux (appartenant maintenant à l’Université de Liège, ULg) a ... [more ▼]

En 2007, l’unité de Gestion des Ressources forestières et des Milieux naturels de la Faculté Universitaire des Sciences Agronomique de Gembloux (appartenant maintenant à l’Université de Liège, ULg) a installé un vaste dispositif de suivi de la régénération naturelle de chêne et de hêtre en Ardenne. Ce document présente la synthèse des résultats pour la période de 2007 à 2012. Il a été rédigé suite à la demande des agents de terrain et des ingénieurs de cantonnement hébergeant les sites expérimentaux. [less ▲]

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See detailModélisation du transfert radiatif en forêts feuillues ardennaises : adaptation de la librairie Samsaralight
Ligot, Gauthier ULg; Jonard, Mathieu; de Coligny, François et al

Conference (2013, April 08)

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See detailQuel type de peuplement pour un renouvellement naturel du douglas?
Petit, Sébastien; Claessens, Hugues ULg; Ligot, Gauthier ULg

in Forêt Wallonne (2013), 122

L'article identifie les caractéristiques des peuplements de douglas qui favoriseraient l'obtention de régénération naturelle. Les seuils d'apparition de la régénération semble facilement atteint. L ... [more ▼]

L'article identifie les caractéristiques des peuplements de douglas qui favoriseraient l'obtention de régénération naturelle. Les seuils d'apparition de la régénération semble facilement atteint. L'article encourage donc les gestionnaires à renouveler leur peuplement de manière naturelle. [less ▲]

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See detailModeling recent bark stripping by red deer (Cervus elaphus) in South Belgium coniferous stands
Ligot, Gauthier ULg; Gheysen, Thibaut; Lehaire, François ULg et al

in Annals of Forest Science : a Multidisciplinary and International Journal (2013), 70(3),

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See detailThe detection and characterization of broad-leaved forest canopy gaps: a regeneration perspective
Bonnet, Stéphanie ULg; Bauwens, Sébastien; Lehaire, François ULg et al

Poster (2012, September)

Canopy gaps are areas of high regeneration potential and, in uneven-aged forest, gaps are therefore places of particular care for the forest manager. Nevertheless the cartography and characterization of ... [more ▼]

Canopy gaps are areas of high regeneration potential and, in uneven-aged forest, gaps are therefore places of particular care for the forest manager. Nevertheless the cartography and characterization of canopy gaps are complex issues. This paper addresses the fundamental question of the canopy gap definition: what is the minimal area, the maximal height of vegetation, type of regeneration, etc? From a regeneration point of view, canopy gaps can be defined as holes in the forest cover where light conditions are suitable for recruitment. As an active sensor, LiDAR has made it possible to tackle the problems of shadows and penetration into the canopy, typical of aerial images. This study investigates the cartography and characterization of forest canopy gaps as areas of natural regeneration. [less ▲]

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See detailAssessing and Harmonizing Lying Deadwood Volume with Regional Forest Inventory Data in Wallonia (Southern Region of Belgium)
Ligot, Gauthier ULg; Lejeune, Philippe ULg; Rondeux, Jacques ULg et al

in Open Forest Science Journal (2012), 5

Using lying deadwood or coarse woody debris (CWD) is on the rise among national and local forest inventories. We compared two generally recommended methods for lying deadwood: line intersect sampling and ... [more ▼]

Using lying deadwood or coarse woody debris (CWD) is on the rise among national and local forest inventories. We compared two generally recommended methods for lying deadwood: line intersect sampling and fixed area sampling. We assessed both methods in plots of the regional forest inventory of Wallonia (southern region of Belgium) and we developed bridging functions that converts CWD volume estimates to estimates that would have been obtained with different thresholds. [less ▲]

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See detailSimuler la ressource forestière à l'échelle d'un massif : application de SIMMEM et GYMNOS
Ligot, Gauthier ULg; Vallet, Patrick; Perin, Jérôme ULg et al

Conference (2012, April 02)

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See detailHarmonized Growth Models and Simulations of the Evolution of Pure Stands of Norway spruce, Larches and Douglas-fir for Southern Belgium (Wallonia).
Perin, Jérôme ULg; Ligot, Gauthier ULg; Cerisier, François ULg et al

Poster (2012, March 02)

In order to compare different silvicultural scenarios we have undertaken the development of a software that can simulate stand evolution in regards to their species composition, site characteristics and ... [more ▼]

In order to compare different silvicultural scenarios we have undertaken the development of a software that can simulate stand evolution in regards to their species composition, site characteristics and silvicultural operations. As a first approach we limited the scope of our work to even-aged and pure coniferous stands of the three most important coniferous species in Wallonia (southern part of Belgium): Norway spruce (Picea abies), douglas-fir (Pseudotsuga menziensii) and larches (Larix sp.). This presentation introduces carried out simulations and compare their outcomes. First we gathered data sets from the permanent regional inventory, from observation networks and experimental plots throughout Wallonia. Then we adjusted, for these species, harmonized and distance-independent models of dominant-height growth, tree diameter growth, mortality, and the distribution of tree diameter frequency before the first thinning. Next we implemented those models in the Capsis platform, and we simulated, for the three species, the evolution of virtual stands using different scenarios. On one hand the evolution was performed without thinning, and on the other hand we applied silvicultural scenarios that are commonly used in Wallonia. As a result these models highlight, for example, the great juvenile growth and sensibility to stands density of larches whereas Norway spruce behaves the opposite. Further work is however needed to predict and simulate wood quality and value. Once this will be achieved we will attempt to optimize silvicultural scenarios for the three species. [less ▲]

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See detailStructure spatiale des arbres des savanes boisées et forêts claires soudaniennes : implication pour les enrichissements forestiers
Fonton, Noël Houédougbé; Atindogbe, Gilbert; Fandohan, Belarmain et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2012), 16(4), 429-440

During the last decade, management of woodlands in the Sudanian region of Benin has been based on enrichment with valuable tree-species. Yet, no previous research has been undertaken to support enrichment ... [more ▼]

During the last decade, management of woodlands in the Sudanian region of Benin has been based on enrichment with valuable tree-species. Yet, no previous research has been undertaken to support enrichment design with respect to plant eye view, tree growth magnitude or survival capacity under local forest environments. To fill in this gap, Ripley's K function was used to assess the spatial pattern of trees, diameter classes and dominant valuable species in the Sudanian zone. Data were collected in four sites of variable size (150 X 100 m, 150 X 100 m, 100 X 50 m and 150 X 150 m). Mostly, the spatial patterns of the target species revealed small-clumps. Within these small-clumps, intraspecific repulsions were observed on average at a 3 m scale, while interspecific repulsions were noticed at a 4.5 m scale. Only a weak repulsion between diameter size was also remarked, suggesting that proximity to adult trees would not affect the survival of young plants. With regard to observed repulsion scales, we would suggest using a minimum of a 3 m space between trees of the same species and a 4.5 m space between trees of different species, for enrichment plantings in Sudanian woodlands, if based on the target species. However, this suggested spacing may not be optimal with regard to plant growth. Further investigation is needed to address this aspect. [less ▲]

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See detailLe DouglasModel et nos futurs projets CAPSIS
Ligot, Gauthier ULg; Perin, Jérôme ULg; de Pierpont, Astrid ULg

Conference (2011, April 06)

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See detailR en 30 minutes
Ligot, Gauthier ULg

Learning material (2011)

R basics

Detailed reference viewed: 38 (18 ULg)