Academic literature on the topic 'Plantes des savanes'
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Journal articles on the topic "Plantes des savanes"
Lamy Lamy, Georges Maxime. "Étude ethnobotanique et variabilité morphologique de Syzygium guineense var. macrocarpum dans les hautes savanes guinéennes de l’Adamaoua (Cameroun)." BOIS & FORETS DES TROPIQUES 343 (March 31, 2020): 83–84. http://dx.doi.org/10.19182/bft2020.343.a31852.
Full textCisse, Abdoulaye, Mevanly Ouattara, Estelle Anny N’guessan, and Joël Emmanuel N’Gouan Abrou. "Diversité végétale et usages des plantes dans une zone de savane soudanienne : Cas de la localité de Ferkessédougou (Nord, Côte d'Ivoire)." International Journal of Biological and Chemical Sciences 14, no. 8 (2020): 2807–25. http://dx.doi.org/10.4314/ijbcs.v14i8.13.
Full textLOBREAU-CALLEN, Danielle, Roger DARCHEN, and Annick LE THOMAS. "APPORT DE LA PALYNOLOGIE A LA CONNAISSANCE DES RELATIONS ABEILLES/PLANTES EN SAVANES ARBORÉES DU TOGO ET DU BÉNIN." Apidologie 17, no. 4 (1986): 279–306. http://dx.doi.org/10.1051/apido:19860401.
Full textKone, Hervé Cédessia Kéassemon, Nicaise Tetchi Akedrin, Vama Etienne Tia, Fatou Bayoko, and Lacina Fanlégué Coulibaly. "Qualités morpho-physiologiques et évaluation du comportement germinatif des graines du théier des savanes (Lippia multiflora Moldenke)." International Journal of Biological and Chemical Sciences 14, no. 6 (2020): 1988–98. http://dx.doi.org/10.4314/ijbcs.v14i6.5.
Full textGOODWIN, ZOË A., GERMAN N. LOPEZ, NEIL STUART, et al. "A checklist of the vascular plants of the lowland savannas of Belize, Central America." Phytotaxa 101, no. 1 (2013): 1. http://dx.doi.org/10.11646/phytotaxa.101.1.1.
Full textCharles-Dominique, Tristan, T. Jonathan Davies, Gareth P. Hempson, et al. "Spiny plants, mammal browsers, and the origin of African savannas." Proceedings of the National Academy of Sciences 113, no. 38 (2016): E5572—E5579. http://dx.doi.org/10.1073/pnas.1607493113.
Full textErpenbach, Arne, and Rüdiger Wittig. "Termites and savannas – an overview on history and recent scientific progress with particular respect to West Africa and to the genus Macrotermes." Flora et Vegetatio Sudano-Sambesica 19 (December 1, 2016): 35–51. http://dx.doi.org/10.21248/fvss.19.34.
Full textCuenca, Gisela, and Milagros Lovera. "Vesicular – arbuscular mycorrhizae in disturbed and revegetated sites from La Gran Sabana, Venezuela." Canadian Journal of Botany 70, no. 1 (1992): 73–79. http://dx.doi.org/10.1139/b92-009.
Full textRotter, Michael C., and Alan J. Rebertus. "Plant community development of Isle Royale’s moose-spruce savannas." Botany 93, no. 2 (2015): 75–90. http://dx.doi.org/10.1139/cjb-2014-0173.
Full textDevecchi, Marcelo F., Juliana Lovo, Marcelo F. Moro, et al. "Beyond forests in the Amazon: biogeography and floristic relationships of the Amazonian savannas." Botanical Journal of the Linnean Society 193, no. 4 (2020): 478–503. http://dx.doi.org/10.1093/botlinnean/boaa025.
Full textDissertations / Theses on the topic "Plantes des savanes"
Fournier, Anne. "Phénologie, croissance et production végétales dans quelques savanes d'Afrique de l'Ouest : variation selon un gradient climatique /." Paris : Ed. de l'ORSTOM, 1991. http://catalogue.bnf.fr/ark:/12148/cb355011938.
Full textPalla, Florence. "Caractérisation et distribution spatiale des groupements végétaux de la mosaïque forêt-savane du Parc National de la Lopé (Gabon) : apport des traits caractéristiques de la végétation (traits d'histoire de vie) et des images radar PALSAR." Paris 6, 2011. http://www.theses.fr/2011PA066377.
Full textRichard, Jean-François. "Le Paysage, un nouveau langage pour l'étude des milieux tropicaux /." Paris : Ed. de l'ORSTOM, 1989. http://catalogue.bnf.fr/ark:/12148/cb35043201h.
Full textHoungbédji, Tossimidé. "Rhamphicarpa fistulosa : infestation dans les bas-fonds rizicoles de la Région des Savanes (Togo) et étude des interactions hôte-parasite." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS455/document.
Full textMain biotic constraints to rain-fed lowland rice cultivation in northern Togo include the parasitic weed Rhamphicarpa fistulosa (Hochst.) Benth. In order to evaluate efficient strategies to control R. fistulosa, our study was performed taking into account the following main objectives: 1) Identification of the distribution of R. fistulosa and study of the factors favouring its infestation, 2) Study of the impacts of infestation levels on rice weed communities, and 3) Characterization of the host-parasite interactions and their impacts on the host development and the parasite reproduction. Following fields investigations, highest infestations were observed on sandy soils with low levels of organic matter.In addition, weed flora found in the presence of R. fistulosa was much diversified and some weeds were found to been parasitized and could possibly constitute reservoirs to increase the seed stock of the parasite. In controlled experiments, R. fistulosa grown and reproduced better on rice and tomato crops, than on soybean which delayed the reproduction of the parasite. Germination of R. fistulosa seeds was stimulated in presence of cultivated crops or weeds. New collected seeds shown six months dormancy but their germination was stimulated in presence of phytohormones. In conclusion, the best strategies to control R. fistulosa must include delayed sowing, crop rotation with leguminous species (i.e. soybean, peanut or cowpea) and vegetable cropsKeywords: Rhamphicarpa fistulosa, rice, lowland, parasitism, host-parasite interaction, weeds
Aberlin, Jean-Pierre. "Recherches phytosociologiques et phytoécologiques au Mali central." Aix-Marseille 3, 1986. http://www.theses.fr/1986AIX30076.
Full textHappi, Youta. "Arbres contre graminées : la lente invasion de la savane par la forêt au Centre-Cameroun." Paris 4, 1998. http://www.theses.fr/1998PA040022.
Full textSanou, Lassina. "Les sanctuaires boisés de savanes de Bondoukuy (pays Bwa, Burkina Faso) : biodiversité végétale et capacité de régénération." Paris, Muséum national d'histoire naturelle, 2013. http://www.theses.fr/2013MNHN0002.
Full textGiven the erosion of biodiversity and the extinction of plant species, wooded shrines are often portrayed in the literature as high places of plant conservation and as relics of pristine vegetation. But do the related beliefs really include specific ideas of prudence, respect or nature conservation? To verify this statement and to answer this question, wooded shrines of Bondoukuy Department of (1100 km ²) in the savannas of western Burkina Faso have been object of a census as comprehensive as possible. They were identified and their ritual leaders were asked about their role. Their spatial distribution was recorded and integrated into GIS. For botanical and ecological surveys, sampling was based on three major physiographic units and surveys on 1600 m², considered the minimum area for phytosociological survey, groves of smaller surface having been fully inventoried. The shrines were compared with their immediate surroundings (whatever their appearance), as well as with randomly selected control sites in the same physiographic units as shrines. Floristic groups were identified through hierarchical clustering (Ward's method), and their differential and diagnostic species were identified using the index INDVAL. Alpha and gamma diversity of ligneous and regeneration of each group were studied. A total of 219 shrines, including 191 with a tree cover (162 groves and 29 sites with only some trees), has been listed. The majority of sacred groves (80% of cases) are located in villages and or within 500 m around them and their surface is less than 1 ha. These shrines show the identity of Bwaba; they allow social cohesion around various cults, good harvests, procreation, rain in drought, health, general protection of villages, success, the fight against adultery etc. . In addition, some of them were used to protect against enemies in the past because the Bwaba have a warrior past. Nine shrines floristic groups, and of 7 control sites groups were isolated. A set of four groups of glaze is characterized by Guiera senegalensis and Azadirachta indica, another two groups of lower slope is characterized and dominated by Anogeissus leiocarpa and Diospyros mespiliformis, the latter being clearly akin to the Sudanian dry forests. Some shrines are invaded by the exotic species Azadirachta indica that defines by itself two groups. One of the groups, characterized by Detarium microcarpum and Burkea africana has a savanna affinity; others rather have a forest affinity. The shrines are floristically related to their immediate surroundings but they better keep their ligneous flora as these ones because they are protected against fire and logging. Shrines located in the most humid environments contain some "endangered" and "near-threatened" species according to IUCN (1. 1% vs. 2. 1%). These shrines of the wettest environments, however, appear floristically close to the control forest sites that are the most man-modified. Diversity a of shrines is lower than that of the savannah controls, but their overall wealth and diversity g is equal to or higher than that of forest shrines. The invasion of Azadirachta indica has a very negative effect on species richness. Thea richness is all the more high than the area of the sanctuary is great. Regarding regeneration, seventeen woody species contribute significantly to the maintenance of stands of shrines. However, their generation is very low in shrines invaded by Azadirachta indica. We show that these shrines are mostly very close to the villages, that they are small, located in highly fragmented and man-modified places, and that some of them are invaded by A. Indica, which is not in accordance with the generally accepted idea of a preservative effect important in terms of richness of biodiversity. , However, in the current context of environmental degradation, as gallery forests are now disappearing into the study area whereas wooded shrines retain a seed potential that could be used in reforestation activities in Burkina Faso
Simioni, Guillaume. "Importance de la structure spatiale de la strate arborée sur les fonctionnements carboné et hydrique des écosystèmes herbes-arbres : exemple d'une savane d'Afrique de l'Ouest." Paris 11, 2001. http://www.theses.fr/2001PA112270.
Full textVegetation spatial structure is an important aspect of tree/grass ecosystem structure, but its influence on primary production and water balance has not been explored yet. To determine the importance of the spatial structure of the tree layer on a savanna ecosystem (Lamto, Ivory Coast ) carbon and water functions, a spatially explicit model was used. Field experiments were conducted to provide data to parameterize and test the model. Model tests were accurate. Experimental simulations done with the model showed that : (1) tree density had important effects on the partitioning of production and transpiration between the grass and tree components, on the total system production, and on ecosystem resource ( light, water, nitrogen ) use efficiencies ; (2) tree aggregation could, independently of tree density. .
Ibanez, Thomas. "Dynamiques des forêts denses humides et des savanes en réponse aux incendies en Nouvelle-Calédonie." Phd thesis, Aix-Marseille, 2012. http://tel.archives-ouvertes.fr/tel-00681865.
Full textHackel, Jan. "Molecular biogeography of grasses and tropical grasslands." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30222.
Full textGrasses (Poaceae) are a large, cosmopolitan plant family. In this dissertation, I used molecular methods to study their biogeographic history. The first chapter focuses on determinants of lineage dispersal in the temperate subtribe Loliinae, with distance found to be the dominant factor. The second chapter analyses the origins of Madagascar's grass flora. Two large in situ radiations of C3 grasses were found while C4 grasses immigrated more frequently and support the pre-human presence of grasslands in Madagascar. The third chapter resolves relationships of an Asian C3 lineage using phylogenomic methods, with implications for C4 photosynthesis evolution and the assembly of tropical grasslands. The fourth and final chapter developed a metabarcoding method for the analysis of fungal endophyte communities associated to grasses in Madagascar, with results highlighting methodological limitations
Books on the topic "Plantes des savanes"
Riou, G. Savanes, l'herbe, l'arbre et l'homme en terres tropicales. Masson, 1995.
Ghazanfar, Shahina A. Savanna plants of Africa. Macmillan, 1988.
Masocha, Mhosisi. Savanna aliens. International Institute for Geo-Information Science & Earth Observation, 2009.
Boulvert, Yves. Documents phytogéographiques sur les savanes centrafricaines. ORSTOM Editions, 1995.
Ramia, Mauricio. Ecología de las sabanas del estado Cojedes: Relaciones vegetación-suelo en sabanas secas. Proyecto CONICIT S1-1492 de la Fundación La Salle de Ciencias Naturales, 1993.
Ecology and management of North American savannas. University of Arizona Press, 1997.
Rooyen, Noel Van. Flowering plants of the Kalahari dunes. Ekotrust, 2001.
Cochrane, Theodore S. Atlas of the Wisconsin prairie and savanna flora. Dept. of Natural Resources, 2000.
Fournier, Anne. Phénologie, croissance et production végétales dans quelques savanes d'Afrique de l'Ouest: Variation selon un gradient climatique. Editions de l'ORSTOM, 1991.
Jansma, Rudi. Ecology of some northern Suriname savannas. Koeltz Scientific Books, 1994.
Book chapters on the topic "Plantes des savanes"
Lüttge, Ulrich. "Savannas." In Physiological Ecology of Tropical Plants. Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03340-1_7.
Full textKimpouni, V. "Les Eriocaulaceae et leurs habitats dans les savanes africaines." In The Biodiversity of African Plants. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0285-5_27.
Full textOteng-Yeboah, A. A. "Biodiversity in three traditional groves in the Guinea savanna, Ghana." In The Biodiversity of African Plants. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0285-5_25.
Full textLykke, A. M. "How gallery forest turns into savanna: an example from Senegal." In The Biodiversity of African Plants. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0285-5_42.
Full textErnst, Wilfried H. O., Jos W. M. van de Staaij, and Hans J. M. Nelissen. "Reaction of savanna plants from Botswana on UV-B radiation." In UV-B and Biosphere. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5718-6_15.
Full textNeumann, Katharina. "Charcoal from West African Savanna Sites." In The Exploitation of Plant Resources in Ancient Africa. Springer US, 1999. http://dx.doi.org/10.1007/978-1-4757-6730-8_17.
Full textSinsin, B., M. Oumorou, and V. Ogoubyi. "Les faciès à Andropogon pseudapricus des groupements post-culturaux et des savanes arbustives du Nord-Bénin: dissemblance floristique et caractères communs." In The Biodiversity of African Plants. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0285-5_31.
Full textMora, Edith, Danilo Lopez-Hernández, and Marcia Toro. "Arbuscular Mycorrhizae and PGPR Applications in Tropical Savannas." In Sustainability in Plant and Crop Protection. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17597-9_11.
Full textRao, I. M., C. Plazas, and J. Ricaurte. "Root turnover and nutrient cycling in native and introduced pastures in tropical savannas." In Plant Nutrition. Springer Netherlands, 2001. http://dx.doi.org/10.1007/0-306-47624-x_475.
Full textOikeh, S. O., and W. J. Horst. "Agro-physiological responses of tropical maize cultivars to nitrogen fertilization in the moist savanna of West Africa." In Plant Nutrition. Springer Netherlands, 2001. http://dx.doi.org/10.1007/0-306-47624-x_391.
Full textConference papers on the topic "Plantes des savanes"
werneck, Gabriela, Catarina Bernardes Pereira, Renata Almeira, et al. "SCREENING OF PROTEASES PRODUCTION BY ENDOPHYTIC FUNGI ISOLATED OF BRAZILIAN SAVANNA PLANTS." In Simpósio Nacional de Bioprocessos e Simpósio de Hidrólise Enzimática de Biomassa. Galoá, 2015. http://dx.doi.org/10.17648/sinaferm-2015-33813.
Full textEastburn, Sharon. "Soothing the Savage Fish: The Effects of Plant Extracts on the Behavior of Betta splendens." In ASPB PLANT BIOLOGY 2020. ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1376627.
Full textSamardžić, Biljana, and Daliborka Škipina. "THE IMPORTANCE OF SAVA’S SPELLING BOOK IN THE BEGINNERS’ COURSE OF READING AND WRITING AND IN THE TEACHING OF SERBIAN CULTURE." In SCIENCE AND TEACHING IN EDUCATIONAL CONTEXT. FACULTY OF EDUCATION IN UŽICE, UNIVERSITY OF KRAGUJEVAC, 2020. http://dx.doi.org/10.46793/stec20.299s.
Full textSilva, Lucas Leite Da, Milena Pupo Raimam, and Taline Silva Conceição. "LEVANTAMENTO PRELIMINAR DA BIODIVERSIDADE DE FUNGOS MICORRÍZICOS EM CINCO FITOFISIONOMIAS DA SERRA DE CARAJÁS-PA." In I Congresso Brasileiro de Biodiversidade Virtual. Revista Multidisciplinar de Educação e Meio Ambiente, 2021. http://dx.doi.org/10.51189/rema/1218.
Full textReports on the topic "Plantes des savanes"
Ffolliott, Peter F., Gerald J. Gottfried, Hui Chen, Cody L. Stropki, and Daniel G. Neary. Fire effects on herbaceous plants and shrubs in the oak savannas of the Southwestern Borderlands. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2012. http://dx.doi.org/10.2737/rmrs-rp-95.
Full textPeters, Jan. Plant diversity patterns at different spatial scales in a semi-arid savanna ecosystem in central Namibia. BEE-Press, 2010. http://dx.doi.org/10.7809/thesis.diplom.003.
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