References of "Malaisse, François"
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See detailInterprétation paysagère du processus d’urbanisation à Lubumbashi (RD Congo): dynamique de la structure spatiale et suivi des indicateurs écologiques entre 2002 et 2008
Useni Sikuzani, Yannick; Andre, Marie ULg; Mahy, Grégory ULg et al

in Mahy, Grégory; Colinet, Gilles; Bogaert, Jan (Eds.) Anthropisation au Katanga (in press)

Lubumbashi is one of the fastest growing African cities with annual population growth rates of 5 %. Its urban population growth leads to a rapid urban growth associated with several environmental problems ... [more ▼]

Lubumbashi is one of the fastest growing African cities with annual population growth rates of 5 %. Its urban population growth leads to a rapid urban growth associated with several environmental problems. This study test hypothesis that rapid built-up growth is followed by natural habitats decrease and creates favorable conditions for the spread of Tithonia diversifolia, an invasive specie. From two SPOT satellite images from 2002 and 2008 supported by field visits, seven land cover classes were obtained and the accuracy of the classification was verified. Landscape dynamic has been demonstrated through a transition matrix, by calculating spatial pattern metrics and identification of spatial transformation processes. The results obtained show that built-up covering 32 % of the landscape in 2008 against 22.6 % of the landscape in 2002. Its growth, followed by Tithonia diversifolia and anthropogenic vegetation, operates to the detriment of natural classes. The effect of human impact was translated by the increase of disturbance index which increased from 1.9 to 3.3 in six years, confirming that in the study area, natural classes are removed parallel to aggregation and creating of anthropogenic classes. The study area has undergone significant changes related to urban growth, which implies establishing efficient urban planning and management policies to reverse this trend. [less ▲]

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See detailPotential of copper-tolerant grasses to implement phytostabilisation strategies on polluted soils in South D. R. Congo: Poaceae candidates for phytostabilisation
Boisson, Sylvain ULg; Le Stradic, Soizig ULg; Collignon, Julien et al

in Environmental Science and Pollution Research (2016)

Phytostabilisation (i.e. using plants to immobilise contaminants) represents a well-known technology to hamper heavy metal spread across landscapes. In Katanga (D. R. Congo), Microchloa altera, a tolerant ... [more ▼]

Phytostabilisation (i.e. using plants to immobilise contaminants) represents a well-known technology to hamper heavy metal spread across landscapes. In Katanga (D. R. Congo), Microchloa altera, a tolerant grass from the copper hills, was recently identified as a candidate species to stabilise copper in the soil. More than 50 grasses compose this flora, which may be studied to implement phytostabilisation strategies. However, little is known about their phenology, tolerance, reproductive strategy or demography. The present study aims to characterize the other Poaceae that may be used in phytostabilisation purposes based on the following criteria: their ecological distribution, seed production at two times, abundance, soil coverage and the germination percentage of their seeds. We selected seven perennial Poaceae that occur on the copper hills. Their ecological distributions (i.e. species response curves) have been modelled along copper or cobalt gradients with generalized additive models using logic link based on 172 presence/absence samples on three sites. For other variables, a total of 69 quadrats (1 m2) were randomly placed across three sites and habitats. For each species, we compared the number of inflorescence-bearing stems (IBS) by plot, the percentage of cover, the number of seeds by IBS and the estimated number of seeds by plot between sites and habitat. Three species (Andropogon schirensis, Eragrostis racemosa and Loudetia simplex) were very interesting for phytostabilisation programs. They produced a large quantity of seeds and had the highest percentage of cover. However, A. schirensis and L. simplex presented significant variations in the number of seeds and the percentage of cover according to site. [less ▲]

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See detailCopper-Cobalt Flora of Upper Katanga and Copperbelt : Field Guide
Malaisse, François ULg; Schaijes, Michel; D’Outreligne, Claire

Book published by Presses agronomiques de Gembloux (2016)

The copper-cobalt outcrops of Upper Katanga and north-western Zambia host a particular flora which comprises an estimated 750 species of which more than 400 are treated in this copper-cobalt field guide ... [more ▼]

The copper-cobalt outcrops of Upper Katanga and north-western Zambia host a particular flora which comprises an estimated 750 species of which more than 400 are treated in this copper-cobalt field guide. The aim of this book, resulting from several years of intensive field work and study, is to bring together the basic knowledges permitting an easy approach to the identification of a great number of the species to be encountered. More than 400 species are illustrated with color photographs and/or drawings together with comments concerning synonyms, habit, description, ecology and distribution. Plant species are listed and colour-coded according to classification: Cyanoprocaryota, lichenized Fungi, Anthocerophyta, Marchantiophyta and Bryophyta (red edge), Lycophyta and Monilophyta (green edge), Magnoliopsida (blue edge) and Liliopsida (yellow edge). An index allows easy location either according to genus and species. An account of the research on copper-cobalt ecosystems carried out during the last ten years in southeastern D.R. Congo is also presented. The editors have spent more than twenty years in the area concerned and have collected more than 8,500 voucher specimens, including eleven species new to science (holotypes). [less ▲]

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See detailCommercial farming of Leiolepis guttata in Binh Thuan province, Vietnam: implications for conservation and management
Rochette, Anne-Julie; Tran, Tinh ULg; De Martynoff, Abigail et al

in Herpetological Conservation and Biology (2015), 10(1),

Since the first Indochinese war, natural populations of Leiolepis guttata have been hunted for their meat in southeastern Vietnam as a subsistence meal; nowadays, it has become a luxury delicacy ... [more ▼]

Since the first Indochinese war, natural populations of Leiolepis guttata have been hunted for their meat in southeastern Vietnam as a subsistence meal; nowadays, it has become a luxury delicacy. Commercial farms have become established since 2004 because of wild population declines and increasing demand for meat. We interviewed farmers and restaurateurs about the breeding and trade of the species to better understand the impact on wild populations. The results highlight the recent flourishing expansion of farming with rapidly increasing product prices and number of farms, as well as the ease and profitability of this activity. Wild population declines are widely acknowledged by authorities and local communities. Farms are being regarded as conservation pools to offset wild stock depletion, in addition to an important source of income. We discuss the risks associated with this trade development and we emphasize the conservation implications. Demand for lizards as founders for farms and for meat are likely to increase further, but risks exist that the development of new farms would saturate the market causing prices to ultimately fall. Habitat destruction and over-collecting severely reduce wild populations, but the high densities of farmed lizards raise serious genetic and sanitary issues. We suggest that further information should be collected to assess the sustainability of this trade. Priority should be given to the assessment of natural population densities and hunting effort. Biological patterns of this species are poorly documented and sound knowledge would enable better management of farms, and if this species is recognized as endangered could lead restrictions on harvesting of wild populations. [less ▲]

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See detailNghiên cứu và thiết kế hai kiểu chuồng nuôi nhông cát Leiolepis guttata (Cuvier, 1829) phù hợp với điều kiện nuôi và vốn đầu tư tại huyện Bắc Bình, tỉnh Bình Thuận
Tran, Tinh ULg; Tran, Ngoc Nguyen Kim Dieu; Vo, Kim Thong et al

in Journal of Agriculture Sciences and Technology (2015), 1/2014

Building of an enclosure for rearing of the spotted butterfly lizard, Leiolepis guttata (Cuvier, 1829), by the first farmer in 2004 (in Hong Chinh commune, Hoa Thang ward, Bac Binh district, Binh Thuan ... [more ▼]

Building of an enclosure for rearing of the spotted butterfly lizard, Leiolepis guttata (Cuvier, 1829), by the first farmer in 2004 (in Hong Chinh commune, Hoa Thang ward, Bac Binh district, Binh Thuan province) is considered as a fortuitous discovery which was the initiator of the current expanding trend of its rearing. Because L. guttata is a wild animal, with strong disease resistance and adaptation capacity, livestock farmers are presently not very interested in important aspects: rearing techniques, enclosure’s types, sex ratio, diseases’ prevention, etc. Notably the building of enclosures not perfectly suitable breeds a noticeable loss of the number of lizards and a reduction in the profits for the farmers. To this end, the building of two types of enclosures adapted to local rearing conditions and the investing capital available in Bac Binh district, Binh Thuan province is presently essential. We descrite two types of enclosure: the first one surrounded by a bricks (or breeze blocks) wall, the second one fended by a fiber cement corrugated sheets wall. Moreover, we suggest to introduce plants in order to build a vegetal cover nearer to the natural environment of L. guttata: shrubs and a plant carpet becoming the preferential refuge area of the spotted butterfly lizard. [less ▲]

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See detailHuman consumption of Lepidoptera in Africa : an updated chronological list of references (370 quoted!) with their ethnozoological analysis
Malaisse, François ULg; Latham, Paul

in Geo-Eco-Trop : Revue Internationale de Géologie, de Géographie et d'Ecologie Tropicales (2014), 38(2), 339-372

Human consumption of insects or « lepidopterophagy » is becoming increasingly important. In the present paper 370 references dealing with this subject in Africa are quoted. Access to this information is ... [more ▼]

Human consumption of insects or « lepidopterophagy » is becoming increasingly important. In the present paper 370 references dealing with this subject in Africa are quoted. Access to this information is provided both, by chronological and alphabetic order of authors. A systematic list of scientific names of edible Lepidoptera in Africa is also provided. The importance of the information available for various ethnolinguidstic groups is presented. The evolution of issues covered is analyzed and discussed. [less ▲]

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See detailLeiolepis guttata (Cuvier, 1829): from the wild to the captive breeding; ethology, ecology and its functional role in ecosystems
Malaisse, François ULg; Tran, Tinh ULg; Rochette, Anne-Julie et al

in Kiernan, Mindy (Ed.) Lizards: Thermal Ecology, Genetic Diversity and Functional Role in Ecosystems (2014)

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See detailLA DÉGRADATION D’UN ÉCOSYSTÈME FORESTIER PÉRI-URBAIN : QUELS SONT LES PRINCIPAUX FILTRES À SA RÉGÉNÉRATION ?
Hick, Aurélie ULg; Tooth, Martin; Hallin, Maud et al

Poster (2013, December 19)

Au sud de la République Démocratique du Congo, dans la province du Katanga, le redéveloppement des activités minières a entrainé un développement démographique exponentiel des principales villes minières ... [more ▼]

Au sud de la République Démocratique du Congo, dans la province du Katanga, le redéveloppement des activités minières a entrainé un développement démographique exponentiel des principales villes minières. La population de Lubumbashi, capitale du Katanga, est passée en 50 ans d’environ 100 000 habitants à plus d’1 million et demi (Munyemba Kankumbi, 2010). Cette évolution démographique a accentué la pression sur la forêt claire de type Miombo par l’augmentation des prélèvements, la pression immobilière et l’agriculture de subsistance (Malaisse, 1997). Dans la zone périurbaine de Lubumbashi, les surfaces de forêts claires qui occupaient 85 % du territoire en 1956 ont été réduites à moins de 12 % en 2009 (Munyemba Kankumbi, 2010). Trois études ont été menées dans le but de caractériser les filtres écologiques et les filtres sociaux à la restauration de cet écosystème périurbaine. Les deux premières études ont pour objectif d’illustrer la diversité des communautés végétales du Miombo, leurs variations après dégradation le long d’un gradient forêt/savane sur les sols principaux de la plaine et les principaux filtres écologiques à sa régénération. 134 placettes forestières placées aléatoirement dans les derniers massifs forestiers présents dans un rayon de 50km autour de la ville ont été inventoriées. 53 placettes ont été placées sur trois sites choisis pour caractériser les communautés présentes le long du gradient de dégradation : forêts, forêts dégradées, savanes boisées, savanes arborées et savanes herbeuses. Au sein de ces placettes l’ensemble des espèces forestières ont été identifiées. Le sol a été caractérisé physiquement et chimiquement. La mesure de la biomasse herbacée a également été réalisée sur le gradient de dégradation. Les filtres sociaux ont été analysés aux travers de 35 enquêtes menées dans 4 villages de la plaine afin de comprendre leur mode d’agriculture, leur vision de l’arbre et la possibilité d’insérer un mode de culture de type agroforestier. Les grandes communautés caractéristiques de cet écosystème ont été mises en évidence, illustrant ainsi la richesse des dernières taches forestières présentes dans la plaine. Le type de sol est significativement corrélé à la répartition des communautés. Les essences présentes en savanes sont différentes de celles présentes en forêts pour un même type de sol. La biomasse herbacée est un filtre significatif à la régénération de la forêt favorisant la présence d’espèces tolérantes au feu. La modification des conditions chimiques du sol suite à la production de charbon de bois / agriculture n’est pas apparue comme un filtre majeur de la restauration. Les enquêtes nous ont permis de recenser une liste d’espèces utiles pour la production de charbon de bois, de bois de construction, etc d’après la vision des villageois. Néanmoins, les pratiques villageoises actuelles ne montrent pas d’intérêt à la préservation de ces espèces. Leur système de culture et leurs connaissances semblent tournés vers un mode culture de plus en plus intensif, mono-spécifique et tourné vers l’utilisation de fertilisants. Le problème majeur d’accès à la ressource en bois ne semble pas être dans la conscience de la population alors que la déforestation ne cesse de croitre. [less ▲]

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See detailLes Ressources Sauvages des Bois de Tapia (Uapaca bojeri) à Madagascar
Barsics, Fanny ULg; Malaisse, François ULg; Razafimanantsoa, Tsiresy et al

Poster (2013, October 19)

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See detailTrees communities and filters to restoration along a periurban gradient of tropical forest degradation
Hick, Aurélie ULg; Tooth, Martin; Tshibungu, Alain et al

Conference (2013, October 09)

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See detailTrees communities and filters to restoration along a periurban gradient of tropical forest degradation
Hick, Aurélie ULg; Tooth, Martin; Tshibungu, Alain et al

Conference (2013, June)

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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 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 detailInfluence des reboisements d'eucalyptus (Eucalyptus robusta) et de pin (Pinus kesiya) sur la régénération naturelle de tapia (Uapaca bojeri) en forêt d'Arivonimamo
Rakotondrasoa, Olivia Lovanirina; Stein, Julien; Ayral, Astrid et al

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

Confronted with the ongoing degradation of the tapia woodlands (Uapaca bojeri), reforestation by Pinus sp. and Eucalyptus sp.was considered as an alternative in Arivonimamo to substitute tapia for the ... [more ▼]

Confronted with the ongoing degradation of the tapia woodlands (Uapaca bojeri), reforestation by Pinus sp. and Eucalyptus sp.was considered as an alternative in Arivonimamo to substitute tapia for the production of firewood. However, the invasion by these alien species is actually considered as one of the threats to the tapia woodland in Madagascar. In this context, this study aimed to analyze the regeneration of the tapia woodlands in Arivonimamo. Consequently, “contact zones” between stands of exotic species, Pinus kesiya or Eucalyptus robusta, and U. bojeri were identified, in order to study tree regeneration along transects in each cardinal direction starting inside the exotic forests and continuing into the native populations. This study showed that the density of tapia regeneration varied between sites. It also appeared that the capacity of P. kesiya to invade the tapia woodland is much higher than for E. robusta. Moreover, the regeneration of pine inside the pine’s plantations was rather low. In addition, it was observed that the canopy opening rate had no significant influence on the development of the regeneration of the three species involved. Differences in canopy opening are due to various human activities such as the collection of non-timber forest products (tapia), the forestry operation of cleaning (pine) and early cutting (eucalyptus). [less ▲]

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

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

Deforestation is a serious problem in Madagascar leading to natural resource degradation. In this context, this study aims to identify indicators of forest degradation for the tapia forest of Arivonimamo ... [more ▼]

Deforestation is a serious problem in Madagascar leading to natural resource degradation. In this context, this study aims to identify indicators of forest degradation for the tapia forest of Arivonimamo. A forest map of the area consists of a document in which the forest is stratified into two types: degraded tapia forest and highly degraded tapia forest. The approach consisted of the comparison of these two types of forest, the degraded tapia being the reference. Data collection was based on a forest inventory through discontinuous transects related to the structure of the tapia forest, with a total length of 1,500 m per type. It appears that tree density, average tree height, average tree diameter, basal area and density of regeneration and undergrowth, are indicators for the identification of the state of degradation of the tapia forest. The distribution of U. bojeri is aggregated in both sites; however, the degree of aggregation is significantly higher in the highly degraded forest in response to the lower tree density. Leptolaena pauciflora and Erica sp. are the main undergrowth indicator species of degradation; their abundance is correlated with degradation. Knowledge of these indicators of tapia degradation will provide guidance and technical tools to improve evaluation and monitoring of the degradation of the tapia forest. [less ▲]

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See detailLes bois de Tapia de Madagascar: approches phytogéographique, floristique et écologique
Malaisse, François ULg; Pinel, Romain; Razafimanantsoa, Tsiresy Maminiaina et al

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

This chapter has three objectives. Firstly, it is emphasized that tapia-dominated areas are spatially distributed into four localities situated on the so-called “Highlands”. Secondly, based on a global ... [more ▼]

This chapter has three objectives. Firstly, it is emphasized that tapia-dominated areas are spatially distributed into four localities situated on the so-called “Highlands”. Secondly, based on a global survey of available literature on tapia vegetation as well as on floristic surveys carried out in two entities (Arivonimamo et Ambatofinandrahana), an actualized list of their floristic diversity is composed. This list is partially illustrated with photographs and plates on a CD-ROM; vernacular names of the considered taxa are quoted. Finally a preliminary ecological interpretation is given based on the vegetation units and (or) ecological niches which are schematically represented. [less ▲]

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See detailLa forêt de tapia, écosystème endémique de Madagascar : écologie, fonctions, causes de dégradation et de transformation (synthèse bibliographique)
Rakotondrasoa, Olivia Lovanirina; Malaisse, François ULg; Rajoelison, Gabrielle Lalanirina et al

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

This article presents an overview of the tapia forest (Uapaca bojeri Baill.) in Madagascar in order to emphasize its importance for the development of the local population through improving household ... [more ▼]

This article presents an overview of the tapia forest (Uapaca bojeri Baill.) in Madagascar in order to emphasize its importance for the development of the local population through improving household incomes. The tapia forest is a “socio-natural” formation, quasi-monospecific with regard to the tree stratum and endemic to Madagascar. It is only located in the Highlands of Madagascar. Alongside its ecosystem functions, the tapia forest hosts various resources, including non-timber forest products as well as timber itself, all of which play an important role in the informal local economy. However, the tapia ecosystem is threatened by human destruction through bush fires, production of firewood and charcoal, agriculture expansion, and by invasion of exotic species introduced for the purposes of reforestation. Subsequently, the sustainable management and protection of the tapia forest is essential in order to enable local populations to reap its benefits across several generations. [less ▲]

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See detailInfluence de la plante hôte sur le développement larvaire de Borocera cajani (Lepidoptera: Lasiocampidae)
Razafimanantsoa, Tsiresy; Malaisse, François ULg; Raminosoa, Noromalala et al

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

Borocera cajani Vinson (Lepidoptera: Lasiocampidae) is a silk moth endemic to Madagascar that is currently used to produce silk textiles. This silk moth is polyphagous and colonizes forests situated in ... [more ▼]

Borocera cajani Vinson (Lepidoptera: Lasiocampidae) is a silk moth endemic to Madagascar that is currently used to produce silk textiles. This silk moth is polyphagous and colonizes forests situated in the central Highlands, mainly constituted by tapia trees (Uapaca bojeri). Two host plants are commonly used by the caterpillar of this moth species: tapia and voafotsy (Aphloia theiformis). In this work we have evaluated parameters of different stages (survival rate, development duration, weight and size, fecundity, etc.) of B. cajani on both host plants. We have observed a 30% higher survival rate on U. bojeri. Larval and pupae duration were shorter on U. bojeri (64,8 ± 1,5 days) than on A. theiformis (87,4 ± 2,0 days). Cocoons were bigger when obtained from larvae fed on U. bojeri. This plant is therefore better for the development of B. cajani and should be used in intensive rearing of this silk moth. [less ▲]

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See detailLes ressources sauvages comestibles des bois de tapias : inventaire des produits connus et consommés par les villageois
Barsics, Fanny ULg; Malaisse, François ULg; Razafimanantsoa, Tsiresy maminiaina et al

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

Les populations des Hautes Terres centrales de Madagascar vivent notamment de ressources abritées par les bois de tapia (Uapaca bojeri Baill.). Parmi celles-ci, des ressources séricigènes servent autant ... [more ▼]

Les populations des Hautes Terres centrales de Madagascar vivent notamment de ressources abritées par les bois de tapia (Uapaca bojeri Baill.). Parmi celles-ci, des ressources séricigènes servent autant dans les traditions qu’au commerce à la fois local et touristique. Le landibe (Borocera cajani Vinson, Lasiocampidae) est l’espèce principale qui permet cette exploitation. Ses chrysalides sont également comestibles. Cette ressource en déclin de par les pressions qu’elle subit, et celles subies par la forêt, est loin d’être la seule abritée par les tapia. Dans ce chapitre, nous dressons une liste de produits sauvages comestibles au moyen d’enquêtes réalisées auprès des villageois, avec pour objectif de souligner l’importance d’actions rapides à entreprendre pour sauvegarder cette biodiversité cruciale dont dépendent les habitants de la régions. [less ▲]

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