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See detailForensic science technique applied for calculation of kinship index
Bömcke, Elisabeth ULg; Gengler, Nicolas ULg

Poster (2010)

Implementing conservation strategies needs the knowledge of relationships inside the concerned population. The aim of this study was to find tools to help scientists and breeders to manage endangered ... [more ▼]

Implementing conservation strategies needs the knowledge of relationships inside the concerned population. The aim of this study was to find tools to help scientists and breeders to manage endangered populations or populations with missing pedigree information. The animal genetics literature often seems unaware of relevant developments in human genetics (and conversely). In this study, an approach called Familial Searching was tested. This is used in forensic science, in addition to matching DNA evidence directly to criminal profiles, to search for people (present in a database) who are related to an individual that left DNA evidence at a scene of crime. This method is based on the calculation of likelihood ratios (LR) between genotype of an individual and genotypes of each other individuals of the database. In order to decrease the number of comparisons, the available pedigree information was used as ‘local’ prior information, i.e. relating to specific pairs of individuals. General knowledge about the studied population (e.g., generation interval, sexual maturity) was considered as ‘global’ prior information. Including prior information reduced the number of comparisons from over 50%. Results showed that the parents were always classified into the 4 highest LR. This method simplified parentage verifications, it allowed the detection of 90% of false parentage (LR=0). It also allowed to create new links in the pedigree through detection of unregistered parents. The method was tested on the Skyros pony, an indigenous Greek breed. For this breed, partial pedigree information was available, and 99 individuals were genotyped at 16 microsatellite loci. The method allowed to check about 2500 possible parent-child combinations, three registered parentages were considered as incorrect and one non-recorded parentage was detected. The method will now be tested on other breed and with other markers, e.g. SNPs. [less ▲]

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See detailForensic study of volatile organic compounds released from decaying bodies
Stefanuto, Pierre-Hugues ULg; Brasseur, Catherine ULg; Dekeirsschieter, Jessica ULg et al

in Hyphenated Techniques in Chromatography-12 Book of abstracts (2012, February)

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See detailForeseeing nitrate concentration in groundwater: A review of available modelling approaches
Orban, Philippe ULg; Brouyère, Serge ULg

Conference (2009, December 10)

In the scientific community, increasing concerns on groundwater quality and quantity have motivated the development of numerical models for groundwater management since the 1970’s. Mathematical and ... [more ▼]

In the scientific community, increasing concerns on groundwater quality and quantity have motivated the development of numerical models for groundwater management since the 1970’s. Mathematical and numerical models are, for example, promising tools for prediction of concentration and they can be used to make the dynamic link between nitrogen manure and the resulting evolution of nitrate concentration in groundwater. However, from a practical and managerial perspective, there have been very few real attempts of developing efficient calibrated and validated transport models in particular at the scale of the groundwater body, which is the management unit of groundwater resource in the European Union. Actually two main challenges remains, (1) performing numerical tools are not really available and (2) parametrisation of such transport models at the regional scale is difficult due to the large amount of data required. Generally speaking models can be grouped in different categories ranging from black box models to physically based distributed models. The black box models such as transfer function are simple but attractive because they require relatively less data but with the drawback that modelling result are not spatially distributed while the predictive capability of these models is questionable due to the semi-analytical nature of the process descriptions. On the contrary, physically based distributed model require more data but, due to a more advanced description of ongoing processes, such models are expected to have better predictive capabilities than the black box models. Black box model and physically based distributed model approaches have all proved their utilities and have all their justifications, advantages and disadvantages regarding the development of regional scale groundwater model. A new flexible methodology (the Hybrid Finite Element Mixing Cell method) has been developed that allows combining in a single model, and in a fully integrated way, different mathematical approaches of various complexities for groundwater in complex environment. This method has been implemented in the SUFTD, a finite element groundwater flow and solute transport numerical model. Combining on the one hand the use of a spatially distributed groundwater flow and solute transport model taking advantages of this Hybrid Finite Element Mixing Cell Approach method and on the other hand spatial datasets of tritium and nitrate contents, an illustration on the problem of nitrate trend assessment and forecasting for an important groundwater resource located in the Geer groundwater body (480 km²) in the Walloon Region of Belgium will be proposed. [less ▲]

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See detailForest and garden: traces of wildness in a modernizing land, 1897-1949 (M.L. Simo).
Bogaert, Jan ULg

in Landscape Journal (2004), 23(2), 174-176

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See detailForest anomalies and human occupation in Central Africa during the last two millennia
Livingstone Smith, Alexandre; Beeckman, Hans; Cerisier, François et al

Conference (2012, June 23)

Central African rainforests are no longer considered as pristine, but as the outcome of a long history of changes due mainly to climatic variation. For the later part of the Holocene it has been ... [more ▼]

Central African rainforests are no longer considered as pristine, but as the outcome of a long history of changes due mainly to climatic variation. For the later part of the Holocene it has been hypothesised that climate changes together with human activities triggered modifications in terms of distribution and botanical composition. While developing a research project to explore the mechanisms of forest change, new research avenues for the archaeology of rainforests became apparent. In this paper, we outline the results of this approach, implemented on a forest concession (Cameroon). We introduce our methodology based on the analysis of botanical inventories (focused on large trees of human linked species and light demanding species), coupled to systematic core boring and test pits. A sampling strategy for the collection of charcoal and its identification is developed and archaeological remains found in association are analyzed at the Royal Museum for Central Africa. [less ▲]

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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

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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)

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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 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

Detailed reference viewed: 84 (18 ULg)