References of "Bogaert, Jan"
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See detailEffets de lisière sur la productivité du teck (Tectona grandis L.f.): étude de cas des teckeraies privées du Sud-Bénin
Toyi, Mireille Scholastique; Bastin, Jean-François ULg; Andre, Marie ULg et al

in Tropicultura (2013), 31(1), 62-70

The present study aims to improve the production of teak wood (Tectona grandis L.f.) in private plantations in southern Benin through the application of a central concept in landscape ecology: the edge ... [more ▼]

The present study aims to improve the production of teak wood (Tectona grandis L.f.) in private plantations in southern Benin through the application of a central concept in landscape ecology: the edge effect. As teak is an heliophilous species, the hypothesis of a higher wood production in edges was tested on the basis of the basal area. Sixty-two private teak plantations were investigated and 10,667 trees were measured. The stratified sampling scheme in three distinct parts for each plantation (the centre, the edge and the summits) permitted to highlight the edge effect on wood production. For each part, a plot was installed and the diameter at breast height (dbh) was measured for all trees. The leaf area between the edge and the centre of plantations was measured. Finally, the influence of the spatial configuration of plantations and the direction of each side of these plantations on the production of wood was tested. Results show that the edge effect on the production of teak wood affects four planting lines, the first presenting a production of 150% relative to the centre. We noticed a significant influence of the edge on the leaf area of about 218% relative to the centre. No influence of the direction of the sides of the plantation was observed. The shape of the plantations presents a significant influence on the wood production. These results permitted to propose a planting model included in an agroforestry system that optimizes the production of wood per area and having a succession of two planting lines interrupted by fields. [less ▲]

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See detailTree plantation will not compensate natural woody vegetation cover loss in the Atlantic department of Southern Benin
Toyi, Mireille Scholastique; Barima, Sabas; Mama, Adi et al

in Tropicultura (2013), 31(1),

This study deals with land use and land cover changes for a 33 years period. We assessed these changes for eight land cover classes in the south of Benin by using an integrated multi-temporal analysis ... [more ▼]

This study deals with land use and land cover changes for a 33 years period. We assessed these changes for eight land cover classes in the south of Benin by using an integrated multi-temporal analysis using three Landsat images (1972 Landsat MSS, 1986 Landsat TM and 2005 Landsat ETM+). Three scenarios for the future were simulated using a first-order Markovian model based on annual probability matrices. The contribution of tree plantations to compensate forest loss was assessed. The results show a strong loss of forest and savanna, mainly due to increased agricultural land. Natural woody vegetation (“forest”, “wooded savanna” and “tree and shrub savanna”) will seriously decrease by 2025 due to the expansion of agricultural activities and the increase of settlements. Tree plantations are expected to double by 2025, but they will not compensate for the loss of natural woody vegetation cover. Consequently, we assist to a continuing woody vegetation area decrease. Policies regarding reforestation and forest conservation must be initiated to reverse the currently projected tendencies. [less ▲]

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See detailLandscape Ecology: a unifying discipline
Bogaert, Jan ULg; Andre, Marie ULg

in Tropicultura (2013), 31(1), 1-2

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See detailEffets de lisière sur la teneur en eau et la température du sol à l'échelle du jardin systématique de l'INERA/Yangambi en R.D. Congo
Alongo Longomba, S; Visser, M; Kombele Bishosha, F et al

in Annales des Instituts Supérieurs d’Etudes Agronomiques de Bengamisa (2013), 5

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See detailEcologie du paysage en Afrique subsaharienne
Bogaert, Jan ULg; Andre, Marie ULg

in Tropicultura (2013), 31(1),

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See detailL'écologie du Paysage: un chaînon essentiel pour une gestion multiscalaire de l'hétérogénéité
Mahy, Grégory ULg; Bogaert, Jan ULg; Monty, Arnaud ULg

in Meerts, Pierre (Ed.) Vers une nouvelle synthèse écologique: de l'écologie scientifique au développement durable (2013)

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See detailAnalyse des facteurs anthropiques de dégradation des bois de tapia (Uapaca bojeri) d'Arivonimamo
Rakotondrasoa, Olivia Lovanirina; Ayral, Astrid; Stein, Julien et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

The tapia woodland, an endemic ecosystem of Madagascar, plays an important role in the household economy of the local communities. The dependence of local people on the tapia woodland has led to the ... [more ▼]

The tapia woodland, an endemic ecosystem of Madagascar, plays an important role in the household economy of the local communities. The dependence of local people on the tapia woodland has led to the disturbance and degradation of this ecosystem. In this context, the current study aimed to identify and analyze the anthropogenic factors leading to the degradation of the tapia woodland in Arivonimamo. The working hypothesis was that fire constitutes today the main disturbance factor of the tapia woodland in Arivonimamo, leading to the deforestation and to a continuous degradation of this ecosystem. A typology of indicators of vegetation disturbance was established based upon literature; it was followed by an inventory of these indicators along four transects situated orthogonally around the six villages of the study site. This study showed that fire is no longer the main cause of deforestation and degradation of tapia woodlands in Arivonimamo. The continuing degradation of the woodland is mainly caused by illegal logging by the local population. These results provide key information to improve the management of the tapia woodlands in Arivonimamo. [less ▲]

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See detailActivité journalière et comportement d’alimentation de Borocera cajani Vinson 1863 (Lepidoptera: Lasiocampidae) sur deux de ses plantes hôtes : Uapaca bojeri Baillon 1874 et Aphloia theiformis (Vahl) Bennett 1840
Razafimanantsoa, Tsiresy; Raminosoa, Noromalala; Rakotondrasoa, Olivia et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches : Enjeux écologiques et socio-économiques (2013)

Borocera cajani or landibe is a wild silk-moth, which silk is the most widely used in the textile industry in Madagascar. This endemic species is found throughout the island, but colonizes especially the ... [more ▼]

Borocera cajani or landibe is a wild silk-moth, which silk is the most widely used in the textile industry in Madagascar. This endemic species is found throughout the island, but colonizes especially the tapia forest in the central Highlands. The species has an important economic, culinary and cultural role in the Island. It is polyphagous and frequents several host plants. The daily activity of the larvae of B. cajani has been studied in their natural habitat on two native host plants of the tapia forest: Uapaca bojeri and Aphloia theiformis. Continuous observations during 24 hours on 54 individuals of the last instar of B. cajani have been conducted. Daily periods of activity were found to vary according to the host plant species. Larvae feeding on U. bojeri allocate 6.9% of their time to feed, while the larvae feeding on A. theiformis spend 3.3% of their time. Only 1.0% (15 minutes) and 0.7% (10 minutes) of the observed periods were allocated to movement, in the larvae feeding on U. bojeri et A. theiformis, respectively. Larvae observed on A. theiformis took an average of 3.1 ± 0.2 meals a day, which lasted 15,4 ± 1,3 min. Larvae observed on U. bojeri took an average of 1.9 ± 0.1 meals a day, which lasted 54.8 ± 5.2 min. [less ▲]

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See detailImportance de la méthode de coupe sur la régénération de Combretaceae du Bassin arachidier sénégalais
Faye, E; Diallo, H; Samba, SAN et al

in Tropicultura (2013), 31(1), 44-52

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See detailThe spatial footprint of the non-ferrous metal industry in Lubumbashi
Vranken, Isabelle ULg; Munyemba Kankumbi, François; Amisi Mwana, Yamba et al

in Tropicultura (2013), 31(1), 20-27

In the south-eastern part of the Katanga Province (Democratic Republic of the Congo), high concentrations of copper and cobalt are found in the soils of the well-known “Copper Belt”. Due to the dominant ... [more ▼]

In the south-eastern part of the Katanga Province (Democratic Republic of the Congo), high concentrations of copper and cobalt are found in the soils of the well-known “Copper Belt”. Due to the dominant south-eastern winds, the metallurgic industry in Lubumbashi has been the source of spatially concentrated atmospheric deposits of non-ferrous metal particles and associated substances in a cone-shaped zone, situated north-west of the metal processing site. The existence of this zone has been evidenced using two different techniques: firstly, by means of landscape metric comparisons of the vegetation and bare soil patterns in two study areas, one inside the pollution cone and one outside; secondly, by means of the theory on city perception developed by Kevin Lynch. Higher fragmentation and lower vegetation presence were observed inside the pollution cone, reflecting the negative impact of atmospheric deposits. Those differences were higher for sites closer to the emission source. Lynch’s approach outlined the negative impact of diverse industrial plants on the perception by the local population. Six pollution districts and several contaminated paths, limits, nodes and polluting landmarks were identified. Citizens even recognize them as part of the collective image of the city. [less ▲]

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See detailIdentification des indicateurs de dégradation de la forêt de tapia (Uapaca bojeri) par une analyse sylvicole
Rakotondrasoa, OL; Malaisse, François ULg; Rajoelison, G et al

in Tropicultura (2013), 31(1), 10-19

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See detailAnthropisation et dynamique des paysages en zone soudanienne au nord du Bénin
Mama, A; Sinsin, B; De Cannière, C et al

in Tropicultura (2013), 31(1), 78-88

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See detailDynamics in mangroves assessed by high-resolution and multi-temporal satellite data: a case study in Zhanjiang Mangrove National Nature Reserve (ZMNNR), P. R. China
Leempoel, K; Satyaranayana, B; Bourgeois, C et al

in Biogeosciences Discussions (2013), 10

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See detailSpecies persistence in landscapes with spatial variation in habitat quality: a pair approximation model
Liao, J; Li, ZQ; Hiebeler, DE et al

in Journal of Theoretical Biology (2013), 335

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See detailPertinence de la mise en oeuvre des initiatives de Réductions des Emissions dues à la Déforestation et à la Dégradation des forêts (REDD) pour les communautés locales. Cas des formations de tapia dans la région d'Itasy
Ratsimba, HR; Rabemananjara, ZH; Rabefarihy, AT et al

in Verheggen, François; Bogaert, Jan; Haubruge, Eric (Eds.) Les vers à soie malgaches: Enjeux écologiques et socio-économiques (2013)

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See detailImpact de l'anthropisation sur les variables microclimatiques dans un écosystème forestier des environs de Kisangani (Réserve de Masako, R.D. Congo)
Iyongo Waya Mongo, L; Bulamuzi Bilha, J; Iyongo Bompetsa, C et al

in Annales des Instituts Supérieurs d’Etudes Agronomiques de Bengamisa (2013), 5

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See detailPropriétés et diagnostic de l'état agropédologique du sol de la série Yakonde après fragmentation de la forêt à Yangambi, R.D. Congo
Alongo Longomba, S; Visser, M; Kombele Bishosha, F et al

in Annales des Instituts Supérieurs d’Etudes Agronomiques de Bengamisa (2013), 5

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See detailStructure spatiale des trois espèces les plus abondantes dans la Réserve Forestière de la Yoko, Ubundu, République Démocratique du Congo
Kumba, S; Nshimba, H; Ndjele, L et al

in Tropicultura (2013), 31(1), 53-61

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See detailDiversité et distribution d'abondances des plantes d'un écosystème protégé dans un paysage anthropisé: cas de la Réserve Naturelle Forestière de Bururi, Burundi
Havyarimana, F; Bigendako, MJ; Masharabu, T et al

in Tropicultura (2013), 31(1), 28-35

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See detailEffets de lisière et sex-ratio de rongeurs forestiers dans un écosystème fragmenté en République Démocratique du Congo (Réserve de Masako, Kisangani)
Iyongo Waya Mongo, L; De Cannière, C; Ulyel, J et al

in Tropicultura (2013), 31(1), 3-9

Detailed reference viewed: 42 (3 ULg)