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See detailForest canopy perforation in time and space in Amazonian Ecuador.
Salvador-Van Eysenrode, D; Bogaert, Jan ULg; Van Hecke, P et al

in Acta Oecologica: International Journal of Ecology (2000), 21(4-5), 285-291

Detailed reference viewed: 7 (1 ULg)
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See detailForest fragmentation: causes, ecological impacts and implications for landscape management
Bogaert, Jan ULg; Barima, Y S S; Iyongo Waya Mongo, L et al

in Li, C; Lafortezza, R; Chen, J (Eds.) Landscape Ecology and Forest Management: Challenges and Solutions in a Changing Globe (2011)

Detailed reference viewed: 87 (17 ULg)
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See detailForest growth data : capture, retrieval and dissemination
Adlard, Philip; Rondeux, Jacques ULg

Book published by Faculty of Agriculture - First published in : Bulletin des Recherches Agronomiques de Gembloux, [1990] volume 25 (1) and (2), pages 1-236 (1990)

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See detailForest inventories and biodiversity
Rondeux, Jacques ULg

in Unasylva (1999), 50(196), 35-41

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See detailForest inventory with Terrestrial LiDAR: what about Hand-Held Mobile LiDAR?
Bauwens, Sébastien ULg; Bartholomeus, Harm; Piboule, Alexandre et al

Conference (2014, November 05)

For a decade, studies of the application of static Terrestrial Laser Scanner (TLS) in plotwise forest inventories are giving more and more effective results. In spite of the improvements occurring in ... [more ▼]

For a decade, studies of the application of static Terrestrial Laser Scanner (TLS) in plotwise forest inventories are giving more and more effective results. In spite of the improvements occurring in processing scan data to extract forest attributes, the occlusion effect is still limiting the processing efficiency. A multi-scan approach is recommended to reduce this effect. However, such approach needs pre-scan preparations (setting up the plot, targets positioning), it requires data registration and it comes at a higher data collection cost. In this study we explore the potential of a Hand-held mobile LiDAR System (HMLS) as new LiDAR tool to scan forest plots. HMLS data are compared to static TLS data (single and multi-scan) in terms of data acquisition, registration time and quality of automatic DBH extraction. The low weight, small size of the instrument and no targets requirements reduce the time of pre-scan preparations to the time needed for single scan which is 6 times less than scanning a plot with 5 scans. The registration time depends of the time spent to scan the plot and it is of the same magnitude than single scan. The resulting point cloud of the HMLS is noisier than TLS point clouds. Nevertheless, error on DBH estimations is similar to scanning a plot with a TLS positioned at 5 locations. RMSE is higher than multi-scan and close to single scan for trees detected by the both LiDAR technologies. This first study exhibits the high potential of HMLS by its simple use, which needs only one operator while presenting similar results in automatic DBH extraction than static TLS. Technology and registering method improvements of this type of mobile LiDAR will reduce the noise of the point cloud, which might reduce the DBH RMSE. [less ▲]

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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 detailForest refugia revisited: nSSRs and cpDNA sequences support historical isolation in a wide-spread African tree with high colonization capacity, Milicia excelsa (Moraceae)
Daïnou, Kasso ULg; Bizoux, Jean-Philippe ULg; Doucet, Jean-Louis ULg et al

in Molecular Ecology (2010), 19

The impact of the Pleistocene climate oscillations on the structure of biodiversity in tropical regions remains poorly understood. In this study, the forest refuge theory is examined at the molecular ... [more ▼]

The impact of the Pleistocene climate oscillations on the structure of biodiversity in tropical regions remains poorly understood. In this study, the forest refuge theory is examined at the molecular level in Milicia excelsa, a dioecious tree with a continuous range throughout tropical Africa. Eight nuclear microsatellites (nuSSRs) and two sequences and one microsatellite from chloroplast DNA (cpDNA) showed a deep divide between samples from Benin and those from Lower Guinea. This suggests both that these populations were isolated in separate geographical regions, probably for several glacial cycles of the Pleistocene, and a poor mixture of gene pools despite M. excelsa’s wind-pollination syndrome. The divide can also be related to seed dispersal patterns, which should be largely determined by the migration behaviour of M. excelsa's main seed disperser, the frugivorous bat Eidolon helvum. Within Lower Guinea, a north-south divide, observed with both markers despite weak genetic structure (nuSSRs: FST=0.035, cpDNA: GST=0.506), suggested the existence of separate Pleistocene refugia in Cameroon and the Gabon/Congo region. We inferred a pollen-to-seed dispersal distance ratio of 1.76, consistent with wide-ranging gene dispersal by both wind and bats. Simulations in an Approximate Bayesian Computation framework suggested low nuSSR and cpDNA mutation rates but imprecise estimates of other demographic parameters, probably due to a substantial gene flow between the Lower Guinean gene pools. The decline of genetic diversity detected in some Gabonese populations could be a consequence of the relatively recent establishment of a closed canopy forest which may negatively affect M. excelsa's reproductive system. [less ▲]

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See detailForesterie communautaire : les silences de la loi gabonaise
Vermeulen, Cédric ULg

Conference (2008)

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See detailLa foresterie communautaire au Gabon : l'esprit de la loi
Ndoutoume Obame, C.; Nganda, B.; Mekui, P. et al

in Doucet, Jean-Louis; Vermeulen, Cédric (Eds.) Les premières forêts communautaires du Gabon : Récits d'une expérience pilote (2008)

Les forêts communautaires constituent une des innovations sociales les plus importantes de la nouvelle loi n° 016/01 portant code forestier au Gabon. Cet article détaille les différentes parties de la loi ... [more ▼]

Les forêts communautaires constituent une des innovations sociales les plus importantes de la nouvelle loi n° 016/01 portant code forestier au Gabon. Cet article détaille les différentes parties de la loi relatives à ces dernières et fournit une première interprétation de l’esprit de cette loi et de la volonté du législateur. Les grands thèmes qui y sont défendus tournent autour de la communauté locale, de la décentralisation de la gestion des ressources, de l’aménagement et de la gratuité. La volonté de l’état gabonais d’associer les populations à la gestion de la forêt dans l’optique de contribuer à la réduction de la pauvreté est évidente. [less ▲]

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See detailForesterie en Wallonie: une source d'inspiration ?
Hebert, Jacques ULg

Scientific conference (2010, November 10)

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See detailForesterie sociale ou communautaire? Des approches complémentaires au Gabon
Gregoire, Bruno; Biswas, Suparna; Federspiel, Michèle et al

in Green Heart of Africa Bulletin (2011), (March), 12

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See detailLe Forestor Vertex: une nouvelle génération de dendromètres.
Rondeux, Jacques ULg; Pauwels, D.

in Revue Forestière Française (1998), 50(1), 59-64

The new generation of hypsometers, of which the Swedish Forestor Vertex is representative, use ultrasonic pulses to determine heights from 0 to 100 m, as well as distances and angles. The authors describe ... [more ▼]

The new generation of hypsometers, of which the Swedish Forestor Vertex is representative, use ultrasonic pulses to determine heights from 0 to 100 m, as well as distances and angles. The authors describe the operating principle for this hypsometer and point out some precautions that should be taken when using it. They highlight its main advantages and provide data on its precision. [less ▲]

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See detailForestry curricula at the University Faculty of Gembloux
Rondeux, Jacques ULg

Book (1998)

This paper aims at giving detailed information about the studies at the Gembloux Agricultural University (FUSAGx), especially in the field of Forestry (M. Sc. or "ingénieur").

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See detailForestry curricula at the University Faculty of Gembloux
Rondeux, Jacques ULg

in Schmidt, Pieter; Huss, Jürgen; Lewark, Siegfried (Eds.) New requirements for University Education in Forestry (1998)

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See detailForests and landscapes – Linking ecology, sustainability and aesthetics (S.R.J. Sheppard, H.W. Harshaw).
Bogaert, Jan ULg

in Landscape & Urban Planning (2002), 59(2), 125-127

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See detailUne forêt communautaire n'est pas une concession : adapter les plans simples de gestion
Schippers, C.; Doucet, Jean-Louis ULg; Bracke, C. et al

in Vermeulen, Cédric; Doucet, Jean-Louis (Eds.) Les premières forêts communautaires du Gabon : Récits d'une expérience pilote (2008)

Au Gabon, la gestion d’une forêt communautaire devrait reposer sur un plan simple de gestion, document qui a pour objectif d’orienter à moyen et à long termes les activités entreprises par les communautés ... [more ▼]

Au Gabon, la gestion d’une forêt communautaire devrait reposer sur un plan simple de gestion, document qui a pour objectif d’orienter à moyen et à long termes les activités entreprises par les communautés villageoises. Les expériences précédentes en matière foresterie communautaire en Afrique centrale ont mis en évidence des modalités d’élaboration de plans de gestion trop complexes et trop onéreuses pour les communautés villageoises. Cet article se propose de présenter une méthodologie pour concevoir des plans de gestion réellement simples, réalistes, participatifs, peu coûteux et respectant le cadre légal gabonais en vigueur. Ces plans simples de gestion sont basés sur un aménagement par contenance, un inventaire d’exploitation multi-ressource, une cartographie simplifi ée et des normes de gestion pragmatiques. Les résultats sont présentés pour deux sites partenaires du projet DACEFI, le village de La Scierie et le regroupement de villages de Ebe Messe Melane. [less ▲]

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See detailLa forêt dense humide africaine : quelles perspectives de gestion durable ?
Doucet, Jean-Louis ULg

in Sylva Belgica (2008), 115

Detailed reference viewed: 41 (11 ULg)
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See detailLa forêt dense humide africaine : quelles perspectives de gestion durable ?
Doucet, Jean-Louis ULg

Conference given outside the academic context (2007)

Detailed reference viewed: 11 (3 ULg)