Journal articles: 'Savanes – Burkina Faso'

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Botoni Liehoun, E., Philippe Daget, and Jean César. "Activités de pâturage, biodiversité et végétation pastorale dans la zone Ouest du Burkina Faso." Revue d’élevage et de médecine vétérinaire des pays tropicaux 59, no. 1-4 (January 1, 2006): 31. http://dx.doi.org/10.19182/remvt.9951.

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L’évolution de la biodiversité végétale en fonction de trois niveaux de pression foncière et pastorale (faible, modérée, forte) a été étudiée sur des parcours communautaires de la région subhumide du Burkina Faso. L’étude a été conduite sur des faciès de savanes arbustives à Detarium microcarpum. Ces savanes, très familières dans les paysages végétaux pâturés de la région, sont considérées comme un faciès de dégradation des formations originelles de la région. L’étude met en évidence une augmentation de la biodiversité avec l’augmentation de l’anthropisation et de la pression pastorale. Cette biodiversité élevée s’accompagne toutefois d’une dégradation de la valeur pastorale de la végétation. La production de biomasse et la valeur pastorale baissent de plus de la moitié en cas de pression pastorale forte. La part consommable de la biomasse est également très affectée car celle des espèces considérées comme fourragères médiocres atteint 34 à 68 p. 100 de la biomasse évaluée.

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Devineau, Jean-Louis. "Les espèces ligneuses indicatrices des sols dans des savanes et jachères de l'Ouest du Burkina Faso." Phytocoenologia 31, no. 3 (September 24, 2001): 325–51. http://dx.doi.org/10.1127/phyto/31/2001/325.

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Devineau, Jean-Louis. "Seasonal rhythms and phenological plasticity of savanna woody species in a fallow farming system (south-west Burkina Faso)." Journal of Tropical Ecology 15, no. 4 (July 1999): 497–513. http://dx.doi.org/10.1017/s0266467499000978.

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Leafing, flowering and fruiting of the 24 most representative species of trees and shrubs in Sudanian savannas and fallows near Bondoukuy (Burkina Faso) were studied for 2 y (May 1992 to June 1994). The period of defoliation was generally brief, and leaf flushing, flowering and fruiting occurred mostly in the dry season. The phenological behaviour varied nonetheless across species and individuals. A classification taking into account synchrony/asynchrony and duration in foliation, flowering, fruit ripening and seed dispersal phases allowed comparison of species' phenological plasticity. Species were distributed along a scale of increasing plasticity, from trees to shrubs. Along this scale, species of the Leguminosae appeared to be separated from those of the Combretaceae, the latter being generally considered as characterising fallow farming systems. These results provide new evidence about the effect of phylogenetic constraints on the phenological behaviour of the woody species of the Sudanian savannas.RÉSUMÉ. La feuillaison, la floraison et la fructification des 24 espèces d'arbres et d'arbustes les plus représentatives des jachères et savanes soudaniennes de la région de Bondoukuy (Burkina Faso), ont été étudiées pendant 2 ans (mai 1992 à juin 1994). La défeuillaison est généralement brève et l'émergence des feuilles, la floraison et la fructification se produisent principalement pendant la saison sèche. Les comportements phénologiques varient cependant entre les individus et entre les espèces. Une classification prenant en compte le degré de synchronisme ainsi que la durée de la feuillaison, de la floraison, de la maturation des fruits et de la dispersion des graines a permis de comparer la plasticité phénologique des espèces. Celles-ci sont distribuées selon un gradient de plasticité croissante des arbres aux arbustes. Sur ce gradient les Légumineuses se dissocient des Combrétacées, espèces qui sont par ailleurs généralement considérées comme caractéristiques des jachères. Ces résultats sont une nouvelle illustration de l'effet des contraintes phylogénétiques sur le comportement phénologique des espèces ligneuses des savanes soudaniennes.

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Tankoano, Boalidioa, Mipro Hien, N’Da Hyppolite Dibi, Zézouma Sanon, Jérôme T. Yameogo, and Irénée Somda. "Dynamique spatio-temporelle des savanes boisées de la forêt classée de Tiogo au Burkina Faso." International Journal of Biological and Chemical Sciences 9, no. 4 (December 10, 2015): 1983. http://dx.doi.org/10.4314/ijbcs.v9i4.23.

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César, Jean, Jérémy Bouyer, Laurent Granjon, Massouroudini Akoudjin, Laure Guerrini, and Dominique Louppe. "Les relictes forestières de la falaise de Banfora : un peuplement original au voisinage de Bobo-Dioulasso, Burkina Faso." BOIS & FORETS DES TROPIQUES 305, no. 305 (September 1, 2010): 43. http://dx.doi.org/10.19182/bft2010.305.a20437.

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La falaise de Banfora est d'une grande richesse floristique et faunique. Ses forêts renferment des espèces endémiques mais aussi des espèces remarquables telles que Albiziadinklagei, Acridocarpus chevalieri ou Warneckea fascicularis qui ne se retrouvent nulle part ailleurs au Burkina Faso. C'est aussi le cas de certaines espèces d'insectes telles que Dicronorhina kouensis ou Stephanorhina guttata. Toutefois, ces forêts sont menacées, particulièrement autour de Bobo-Dioulasso où la faune d'origine a déjà partiellement disparu. Les sites de la falaise sont comparés entre eux ainsi qu'avec d'autres forêts de la région de Bobo-Dioulasso. Une très grande diversité biologique s'observe d'une forêt à l'autre. La dispersion des espèces suggère que ces forêts résulteraient de masses forestières plus vastes dont elles seraient les relictes. La végétation forestière des falaises aurait trois origines : la forêt dense sèche, caractérisée par Guibourtia copallifera, qui pourrait représenter le fond forestier originel avant l'invasion de la flore des savanes ; la forêt dense humide, représentée par la majorité des espèces ripicoles, qui serait issue de la masse forestière humide en suivant le réseau hydrographique ; un fond de flore montagnarde inféodé aux falaises gréseuses, dont l'unique représentant serait Warneckea fascicularis, auquel il serait possible de rattacher les espèces de rochers. La communauté de rongeurs des sites forestiers de la falaise de Banfora est un mélange d'espèces typiquement forestières (en particulier Praomys rostratus) dans les zones les moins perturbées et d'espèces très anthropophiles (comme Rattus rattus) sur les sites les plus dégradés par l'action humaine. La plupart des espèces d'insectes ont probablement pour origine la forêt humide de Côte d'Ivoire, avec des influences maliennes, comme Coeliades aeschylus, ou togolaises, comme Dicronorhina kouensis, espèces qui se rencontrent surtout en zone de savane guinéenne, à proximité des forêts galeries. Ces espèces n'étant pas observées au Sud, ni respectivement à l'Est et à l'Ouest du Burkina Faso, la falaise de Banfora pourrait constituer un point de rencontre entre différentes faunes, ce qui en fait toute la richesse. (Résumé d'auteur)

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Ouedraogo, Oumarou, Adjima Thiombiano, Karen Hahn-Hadjali, and Sita Guinko. "Diversité et structure des groupements ligneux du parc national d’Arly (Est du Burkina Faso)." Flora et Vegetatio Sudano-Sambesica 11 (December 1, 2008): 5–16. http://dx.doi.org/10.21248/fvss.11.2.

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La présente étude menée sur la végétation ligneuse du parc national d’Arly a pour objectif de caractériser la diversité et la structure des différents groupements végétaux en relation avec les conditions écologiques. 243 relevés phytosociologiques ont été réalisés. Ces relevés font ressortir 109 espèces ligneuses et 10 groupements par la méthode d’analyse DCA. La diversité des groupements végétaux a été caractérisée par le calcul des indices de diversité. Pour chaque groupement ligneux, 10 relevés ont été choisis de manière aléatoire pour des mesures dendrométriques. Les individus dont le diamètre à 1,3 m du sol est supérieur à 5 cm ont été mesurés. La structure des groupements a été décrite à travers la répartition des individus en classe de diamètre, le calcul de la densité et de la surface terrière. La relation entre la diversité et la structure des groupements a été établie sur la base d’analyse de corrélation. Les groupements ligneux distingués sont répartis suivant le gradient topographique. L’analyse de la structure démographique en classe de diamètre montre que les peuplements des différents groupements végétaux sont stables, ce qui traduit leur adaptation aux facteurs écologiques stationnelles telles que le feu et les conditions de sol. Les forêts claires à Tamarindus indica et Combretum paniculatum et les forêts galeries à Vitex chrysocarpa et Garcinia livingstonei sont les formations les plus denses et les groupements ligneux les plus diversifiés. A l’opposé, les savanes arbustives clairsemées à Euphorbia sudanica et Combretum niorense et celles à Acacia sieberiana sont moins denses et constituent les groupements les plus pauvres en espèces. Ainsi, il existe une relation entre la diversité et la structure des groupements des formations ligneuses. Les conditions édaphiques et topographiques occupées par ces groupements expliquent à la fois leur diversité et leur structure.

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Mopate Logtene, Youssouf. "Caractéristiques, menaces et nécessité de conservation in situ du taurin Baoulé dans les savanes du Sud-Ouest du Burkina Faso." Journal of Applied Biosciences 93, no. 1 (December 7, 2015): 8713. http://dx.doi.org/10.4314/jab.v93i1.5.

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Ouédraogo, Issaka, Blandine Marie Ivette Nacoulma, Oumarou Ouédraogo, Karen Hahn, and Adjima Thiombiano. "Productivité et valeur économique des calices de Bombax costatum Pellegr. & Vuillet en zone soudanienne du Burkina Faso." BOIS & FORETS DES TROPIQUES 319, no. 319 (January 1, 2014): 31. http://dx.doi.org/10.19182/bft2014.319.a20550.

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Arbre des savanes et des forêts claires sahélo-soudaniennes à guinéennes, Bombax costatum est une espèce fortement exploitée pour ses calices et menacée dans plusieurs localités au Burkina Faso. Une alternative à la conservation résiderait dans la reconnaissance de l'intérêt économique de l'espèce. Cette étude évalue la valeur monétaire de la productivité en calices de B. costatum pour fournir des arguments nécessaires à sa conservation. Pour ce faire, des individus de B. costatum ont été échantillonnés dans trois modes d'utilisation des terres ; leur production florale a été intégralement récoltée afin d'évaluer la quantité de calices produite. Des modèles allométriques ont été élaborés pour prédire la productivité en calices. La valeur monétaire des calices par pied de B. costatum a été estimée à partir de la valeur d'échange des calices secs sur les marchés en trois périodes de l'année. Les résultats montrent que la productivité en calices n'est pas significativement influencée par le mode d'utilisation des terres. Parmi les modèles allométriques ajustés, le modèle linéaire de la forme vY = a + bX prédit le mieux la productivité en calices de B. costatum. La valeur monétaire des calices évaluée par pied varie suivant le diamètre et la période. Pour une même période, elle est de 2,57 $US pour les diamètres compris entre 10 et 25 cm et 26,10 $US pour les diamètres supérieurs ou égaux à 50 cm. Sachant que la valeur monétaire des calices ne représente qu'une partie de la valeur monétaire totale de B. costatum, il importe de sensibiliser les populations locales à la plantation de l'espèce et à des techniques de récolte peu préjudiciables.

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Bognounou, Fidèle, Adjima Thiombiano, Patrice Savadogo, Joseph Issaka Boussim, Per Christer Oden, and Sita Guinko. "Structure et composition spécifique de la végétation ligneuse de quatre sites sur un gradient latitudinal au Burkina Faso occidental." BOIS & FORETS DES TROPIQUES 300, no. 300 (June 1, 2009): 29. http://dx.doi.org/10.19182/bft2009.300.a20412.

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Comprendre la distribution de la végétation ligneuse et les facteurs qui la soustendent est une étape cruciale pour la conservation et la gestion des communautés végétales de l¿écosystème des savanes boisées. Cet article présente la composition spécifique, la structure et la diversité des essences ligneuses de quatre sites sur un gradient latitu - dinal dans les secteurs nord-sahélien, sud-sahélien, nord-soudanien et sud-soudanien du Burkina Faso occidental. Toutes les essences ligneuses ont été systématiquement identifiées et mesurées sur 82 placettes de 50 × 20 m2. La densité, la dominance, la fréquence, les espèces et les valeurs d¿importance ont été calculées pour caractériser la composition spécifique. Des mesures de diversité ont été calculées pour analyser l¿hétérogénéité de chacun des sites. Au total, 74 espèces représentant 26 familles et 53 genres ont été recensées, parmi lesquelles les familles des Combrétacées, Mimosacées et Caesalpiniacées s¿avèrent dominantes. Les caractéristiques structurelles font apparaître des différences significatives (p < 0,001) entre sites et espèces. Pour certains sites, les distributions par classe de dimension font apparaître une courbe en J'inversé, indiquant une végétation dominée par des arbres juvéniles. La composition spécifique fait apparaître une faible similitude entre sites, indiquant une diversité bêta élevée qui reflète des différences au niveau des conditions du milieu, de la topographie et de distance entre sites. Les différences spécifiques entre sites mettent en lumière l¿importance des approches à l¿échelle du paysage pour comprendre les distributions, la composition, la structure et la diversité spécifiques, dans une optique de mise en oeuvre de mesures de restauration et de conservation favorisant la surface terrière totale et la diversité de ces écosystèmes. (Résumé d'auteur)

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GNOUMOU, Assan, and Aoupoaoune Basile ADOUABOU. "Étude de la dynamique spatio-temporelle de la réserve de la Comoé-Léraba et de ses terroirs environnants (Burkina Faso, Afrique de l’Ouest." Journal of Applied Biosciences 157 (January 31, 2021): 16213–22. http://dx.doi.org/10.35759/jabs.157.7.

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Objectif : L’emprise de l’Homme sur la végétation s’est traduite au cours de ces dernières décennies par une augmentation des superficies emblavées. Cette étude vise à analyser la dynamique spatio-temporelle de la végétation de la réserve de la Comoé-Léraba et ses terroirs sur une période de 20 ans. Méthodologie et résultats : Deux types d’images Landsat TM, ETM+ pour les périodes de 1990 et 2000 et ASTER 2009 ; prises toutes au mois de novembre ont été nécessaires pour cette étude diachronique. Le logiciel GEOMATICA 9.2 de PCI a été utilisé pour le traitement des images. Ainsi, l’analyse diachronique de la végétation à l’intérieur de l’aire protégée sur les 20 ans témoigne d’une reconstitution du couvert végétale, avec une perte importante des savanes arbustives, des zones de culture et des zones nues (15,93 %). Cependant, hors de l’aire protégée, la synthèse montre une augmentation importante des zones de cultures (14,27%) au détriment des forêts claires, des savanes boisées et arbustives avec une réduction de leurs superficies (15,37%). Conclusion et applications des résultats : L’analyse de la dynamique de la végétation dans la réserve ComoéLéraba et dans ses terroirs, révèle que la pression anthropique menace sa végétation. En effet, cette étude a permis de mettre en évidence que dans les terroirs sous influence humaine, les superficies des formations végétales se réduisent lamentablement au profit des zones de cultures. A l’opposé, les hameaux de cultures abandonnés se sont véritablement reconstitués en savanes arbustives à l’intérieur de l’aire protégée. Même si de nouvelles taches de zones de culture ont commencé à apparaître dans la zone dite tampon, soit par empiètement sur les limites officielles, nous pouvons affirmer que la gestion participative a eu un effet positif dans la dynamique d’évolution des formations végétales dans la réserve de la Comoé-Léraba. Juste qu’à présent cette carte d’occupation des terres éditée de 2009 constitue la plus récente de la réserve. Mot clés : télédétection, aire protégée, conservation, cartographie, végétation. Gnoumou et Adouabou, J. Appl. Biosci. 2021 Étude de la dynamique spatio-temporelle de la réserve de la ComoéLéraba et de ses terroirs environnants (Burkina Faso, Afrique de l’Ouest) 16214 ABSTRACT Spatial and temporal dynamics of the vegetation of Comoé-Léraba reserve and its surrounding lands (Burkina Faso, West Africa) Objectives: Over the last few decades, Human pressure on vegetation has resulted in an increase number of dispersed deforested area. This study aims to analyse the spatio-temporal dynamics of the vegetation in the Comoé-Léraba Reserve and its surrounding areas over a period of 20 years. Methodology and Results: Two types of Landsat TM images, for the periods 1990 and 2000 and ASTER 2009; all taken in November were required for this study. PCI's GEOMATICA 9.2 software was used for image processing. Thus, the diachronic analysis of vegetation within the protected area over 20 years shows a reconstitution of the vegetation cover, with a significant loss of shrubby savannahs, cultivated areas and bare areas (15.93%). However, outside the protected area for the same period, the synthesis shows a significant increase in cultivated areas (14.27%) to the detriment of open forests, wooded and shrubby savannahs with a reduction in their surface area (15.37%). Conclusions and application of findings: The analysis of the dynamics of land use in the Comoé-Léraba Reserve and its surrounding area indicates that anthropic pressure threatens its vegetation. In fact, this study has shown that in areas under human influence, the surface area of plant communities is being reduced dramatically in favour of cultivated areas. On the other hand, the hamlets of abandoned crops have truly reconstituted themselves into shrubby savannahs within the protected area. Even if new patches of cultivated areas have begun to appear in the so-called buffer zone, either through encroachment on the official boundaries, we can affirm that participatory management has had a positive effect in the dynamics of the evolution of plant formations in the Comoé-Léraba Reserve. Up to now, this land use map published in 2009 is the most recent land use map for the reserve. Key words: remote sensing protected area, conservation, mapping, vegetation

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Couteron, Pierre, Patrick D'Aquino, and I. M. O. Ouedraogo. "Pterocarpus lucens Lepr. dans la région de Banh (Nord-Ouest du Burkina Faso, Afrique occidentale). Importance pastorale et état actuel des peuplements." Revue d’élevage et de médecine vétérinaire des pays tropicaux 45, no. 2 (February 1, 1992): 179–90. http://dx.doi.org/10.19182/remvt.8946.

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Situé en zone soudano-sahélienne (14¼05' N et 02¼30' O, avec 550 mm de précipitations annuelles), le département de Banh est très largement consacré aux activités pastorales. Il s'ensuit une pression de plus en plus importante sur un pâturage aérien appauvri dont fait partie Pterocarpus lucens. Sur parcours, les prélèvements sont directs (jeunes individus, rejets) mais surtout par le biais d'émondages. La structure et l'état des peuplements ont été étudiés sur : les hauts de glacis gravillonnaires (fourrés tigrés), les bas de glacis (savanes arbustives), les bas-fonds (forêt claire). La seconde unité fait l'objet d'une utilisation pastorale forte durant la saison humide, les deux autres d'un usage modéré. Les mesures des différentes variables d'état des peuplements ont été faites selon un dispositif de sondage systématique stratifié. les densités d'arbres vivants ainsi que les taux de mortalité sont variables selon les situations écologiques; la régénération, en revanche, en dépend moins nettement et est relativement abondante. Une forte proportion de ses plants semblent condamnés à végéter du fait des abroutissements. Seule l'adoption de mises en défens tournantes peut être garante, à terme, du maintien des potentialités de Pterocarpus lucens.

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De La Rocque, Stéphane, Zakaria Bengaly, Jean-François Michel, Philippe Solano, Issa Sidibé, and Dominique Cuisance. "Importance des interfaces spatiales et temporelles entre les bovins et les glossines dans la transmission de la trypanosomose animale en Afrique de l'Ouest." Revue d’élevage et de médecine vétérinaire des pays tropicaux 52, no. 3-4 (March 1, 1999): 215–22. http://dx.doi.org/10.19182/remvt.9666.

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Lors d'une étude globale du risque trypanosomien menée dans la zone agropastorale de Sidéradougou (Burkina Faso), des troupeaux sentinelles issus de deux systèmes d'élevage différents ont été suivis durant deux ans. L'incidence trypanosomienne mensuelle a été mesurée et interprétée en fonction des parcours des troupeaux, de leur pratique d'abreuvement et de leur contact avec les glossines ripicoles (Glossina tachinoides et G. palpalis gambiensis). A Nakaka, village d'éleveurs Peuls, la transmission en saison sèche est assurée aux points d'abreuvement pérennes dans la galerie forestière. En saison des pluies, les glossines ripicoles se dispersent dans les savanes et infectent les animaux jusque dans les villages. A Péfrou, ensemble de campements d'agriculteurs Bobo, les troupeaux sont composés essentiellement de boeufs de traction. Les animaux issus des campements localisés à proximité du cours d'eau s'abreuvent dans les points d'eau des formations riveraines et sont infectés toute l'année. L'incidence est plus élevée en hivernage et en début de saison sèche, période où les glossines sont les plus nombreuses. A l'opposé, les troupeaux des campements éloignés du réseau hydrographique (3 km) sont abreuvés au puits et ne fréquentent pas les biotopes des glossines. Dans ce paysage essentiellement agricole, les glossines ne se dispersent pas, même en saison humide. L'incidence dans les troupeaux est quasiment nulle. Ces résultats montrent l'importance des interfaces spatiales et temporelles entre les bovins et les glossines dans l'épidémiologie des trypanosomoses en Afrique de l'ouest.

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Traoré, Lassina, Amadé Ouédraogo, and Adjima Thiombiano. "To What Extent Do Protected Areas Determine the Conservation of Native Flora? A Case Study in the Sudanian Zone of Burkina Faso." ISRN Botany 2012 (November 14, 2012): 1–10. http://dx.doi.org/10.5402/2012/168196.

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Natural vegetation contributes significantly to the daily needs of local people especially in the developing countries. This exerts a high pressure on freely accessible natural savannas and jeopardizes the conservation of protected areas. In Burkina Faso, conservation measures, such as the creation of protected forests, have been taken to safeguard the remaining indigenous vegetation. However, little is known about the effectiveness of these protected areas in conserving biodiversity. This study compared the diversity and structural characteristics of the vegetation communities in protected and unprotected areas in the Sudanian zone of Burkina Faso. A total of 208 species representing 41 families and 145 genera were found. Significant differences were found between the species richness in the north Sudanian sector for tree savannas and in the south Sudanian sector for the shrub savannas, tree savannas, savanna woodlands, and the woodlands of land use types. All tree size-class distributions in each vegetation type formed a reverse J-shaped curve, indicating vegetation dominated by juvenile individuals. Similarity in tree species composition between management regimes was found to be low, which reflects differences in habitat conditions, disturbance, and topography. Urgent measures are needed to ensure effective and efficient management and conservation of biodiversity in the protected areas of Burkina Faso.

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Stein, Katharina, Drissa Coulibaly, Larba Hubert Balima, Dethardt Goetze, Karl Eduard Linsenmair, Stefan Porembski, Kathrin Stenchly, and Panagiotis Theodorou. "Plant-Pollinator Networks in Savannas of Burkina Faso, West Africa." Diversity 13, no. 1 (December 22, 2020): 1. http://dx.doi.org/10.3390/d13010001.

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West African savannas are severely threatened with intensified land use and increasing degradation. Bees are important for terrestrial biodiversity as they provide native plant species with pollination services. However, little information is available regarding their mutualistic interactions with woody plant species. In the first network study from sub-Saharan West Africa, we investigated the effects of land-use intensity and climatic seasonality on plant–bee communities and their interaction networks. In total, we recorded 5686 interactions between 53 flowering woody plant species and 100 bee species. Bee-species richness and the number of interactions were higher in the low compared to medium and high land-use intensity sites. Bee- and plant-species richness and the number of interactions were higher in the dry compared to the rainy season. Plant–bee visitation networks were not strongly affected by land-use intensity; however, climatic seasonality had a strong effect on network architecture. Null-model corrected connectance and nestedness were higher in the dry compared to the rainy season. In addition, network specialization and null-model corrected modularity were lower in the dry compared to the rainy season. Our results suggest that in our study region, seasonal effects on mutualistic network architecture are more pronounced compared to land-use change effects. Nonetheless, the decrease in bee-species richness and the number of plant–bee interactions with an increase in land-use intensity highlights the importance of savanna conservation for maintaining bee diversity and the concomitant provision of ecosystem services.

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Zwarg, Alexandra, Marco Schmidt, Thomas Janßen, Karen Hahn, and Georg Zizka. "Plant diversity, functional traits and soil conditions of grass savannas on lateritic crusts (bowé) in south eastern Burkina Faso." Flora et Vegetatio Sudano-Sambesica 15 (December 1, 2012): 15–24. http://dx.doi.org/10.21248/fvss.15.18.

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Grass savannas on lateritic crusts are characteristic landscape elements of the Sudanian savannas. In the W National Park and its surroundings in SE-Burkina Faso, plant diversity of savannas on and adjacent to bowé was assessed by a survey of 19 bowal areas with relevés along transects in each of these. The vegetation structure and species composition of the herb and shrub strata, soil depth, particle size and the concentration of Na+, K+, Mg2+, Ca2+, H+, C and N were recorded on each bowal and its surroundings. Our results show that soils on lateritic crusts are rather shallow and acidic compared to the surrounding savanna woodlands. Nutrient availability is hence comparatively low. The observed flora comprises 130 species mainly belonging to the families Combretaceae, Cyperaceae, Leguminosae and Poaceae with a predominance of therophytes and a comparatively high share of C4 species. In the pastures surrounding the National Park a higher species richness was found than inside the Park due to the occurrence of pioneers, ruderal and unpalatable plants. Savannas on lateritic crusts exhibit due to their extreme edaphic and hydrological conditions a specific flora distinct from their surroundings.

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Qasim, Mohammad, Stefan Porembski, Katharina Stein, and André Lindner. "Rapid Assessment of Key Structural Elements of Different Vegetation Types of West African Savannas in Burkina Faso." Journal of Landscape Ecology 9, no. 1 (January 1, 2016): 36–48. http://dx.doi.org/10.1515/jlecol-2016-0003.

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Abstract Estimations of Leaf Area Index (LAI) have recently gained attention due to the sensitivity to the effects of climate change and its impact on forest ecosystems. Hence, a study was conducted on the LAI estimation of four vegetation types: (i) gallery forests, (ii) woodland savannas, (iii) tree savannas, and (iv) shrub savannas, at two protected areas of Nazinga Game Ranch and Bontioli Nature Reserve, Burkina Faso. A relationship between LAI and Crown Diameter was also investigated at these two sites. Digital hemispherical photography was used for the LAI estimation. Crown diameters (CD) were determined perpendicular to each other and averaged for each tree and shrub. Overall results revealed that LAI ranged from 0-1.33 and the CD was recorded in the range of 0.46-11.01 m. The gallery forests recorded the highest mean LAI 1.33 ± 0.32 as well as the highest mean CD 7.69 ± 1.90 m. The LAI for the vegetation types were at their lower ends as the study was conducted in summer season, higher values are therefore expected in the wet season, as a significant correlation between LAI and precipitation has been emphasized by various studies. Continuous LAI monitoring and studies on various growth parameters of different vegetation types at the study sites are recommended towards enhanced monitoring and an ecologically feasible forest- and savanna-use and management to maintain essential ecosystem functions and services.

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Ouédraogo, Oumarou, Marco Schmidt, Adjima Thiombiano, Karen Hahn, Sita Guinko, and Georg Zizka. "Magnoliophyta, Arly National Park, Tapoa, Burkina Faso [with erratum]." Check List 7, no. 1 (January 1, 2011): 085. http://dx.doi.org/10.15560/7.1.85.

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The Arly National Park of southeastern Burkina Faso is in the center of the WAP complex, the largest continuous system of protected areas in West Africa. Although well known for its large mammal populations, its flora has largely been unexplored until recently. The plant species composition is typical for sudanian savanna areas with a high share of grasses and legumes and similar to other protected areas of the complex, the neighbouring Pama reserve and W National Park. It has more species in common with the classified forest of Kou in SW Burkina Faso than with the geographically closer Sahel reserve. The 490 species belong to 280 genera and 83 families. The most important life forms are phanerophytes and therophytes.

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Zida, D., M. Tigabu, L. Sawadogo, and P. C. Oden. "Germination requirements of seeds of four woody species from the Sudanian savanna in Burkina Faso, West Africa." Seed Science and Technology 33, no. 3 (October 1, 2005): 581–93. http://dx.doi.org/10.15258/sst.2005.33.3.06.

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Hien, Aristide S., Ibrahim Sangaré, Sanata Coulibaly, Moussa Namountougou, Léa Paré-Toé, Anicet Georges Ouédraogo, Abdoulaye Diabaté, Brian D. Foy, and Roch K. Dabiré. "Parasitological Indices of Malaria Transmission in Children under Fifteen Years in Two Ecoepidemiological Zones in Southwestern Burkina Faso." Journal of Tropical Medicine 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/1507829.

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Twenty years after the latest publications performed on the parasitological indices of malaria transmission in northwest of the second city of Burkina Faso, it was important to update the epidemiological profile of malaria in children under the age of 15 years. The objective of this study was to determine and compare the parasitological parameters of malaria transmission by season, area, and age in the two zones (rice and savanna) in the northwest of Bobo-Dioulasso, Burkina Faso. Overall, the results showed that there was no significant difference in the parasitological indices of malaria transmission within children under fifteen years between the rice site and the savannah site and whatever the season (P>0.05). The profound environmental modifications that occurred in the rice zone would have led to changes in vector behavior and consequently to changes in the epidemiological profile of malaria, contrary to the results obtained since the last publications. An entomological study correlated with this study is therefore necessary for effective decision-making for the malaria control in both areas. Future research must now focus on the impact that these profound environmental modifications of rice area are having on malaria control in Burkina Faso.

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Mbayngone, Elisée, Marco Schmidt, Karen Hahn-Hadjali, Adjima Thiombiano, and Sita Guinko. "Magnoliophyta of the partial faunal reserve of Pama, Burkina Faso." Check List 4, no. 3 (August 1, 2008): 251. http://dx.doi.org/10.15560/4.3.251.

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The partial faunal reserve of Pama is situated in the province of Kompienga, in the South-East of Burkina Faso, with typical Sudanian savanna vegetation. Adjacent to the Arli National Park and the Pendjari National Park, it is part of the so-called WAP complex, one of the largest wildlife areas in West Africa. Up to now, only little has been known about its flora. The present study aimed at reducing this gap in knowledge, and represents an important tool for conservation and research. The list of species was compiled from the surveys carried out from 2001 to 2004, additional relevé data, and herbarium specimens. We found 450 species, which belong to 244 genera and 73 families. The most species-rich family is Poaceae (83 species), followed by Fabaceae (64), Cyperaceae (24), Rubiaceae (22), Euphor- biaceae (20), Combretaceae (15), Asteraceae (14), Caesalpiniaceae (14), Mimosaceae (12), and Convolvulaceae (11).

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Mietton, Michel. "Dynamique de l'interface lithosphère-atmosphère au burkina faso l'érosion en zone de savane." Soil Technology 2, no. 3 (September 1989): 325–26. http://dx.doi.org/10.1016/0933-3630(89)90018-4.

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Thiollay, Jean-Marc. "Large Bird Declines with Increasing Human Pressure in Savanna Woodlands (Burkina Faso)." Biodiversity and Conservation 15, no. 7 (June 2006): 2085–108. http://dx.doi.org/10.1007/s10531-004-6684-3.

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Erpenbach, Arne, Markus Bernhardt-Römermann, Rüdiger Wittig, Adjima Thiombiano, and Karen Hahn. "The influence of termite-induced heterogeneity on savanna vegetation along a climatic gradient in West Africa." Journal of Tropical Ecology 29, no. 1 (December 11, 2012): 11–23. http://dx.doi.org/10.1017/s0266467412000703.

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Abstract:Termites are renowned ecosystem engineers. Their mounds have been described as an important element of savanna vegetation dynamics, but little is known about their large-scale impact on vegetation composition. To investigate the influence of termite-induced heterogeneity in savannas along a climatic gradient in West Africa termite mound vegetation was compared with adjacent savanna vegetation using 256 paired plots (size of the termite mound and a corresponding savanna area) in five protected areas from northern Burkina Faso to northern Benin. On each plot vegetation and soil sampling was performed. Additionally bioclimatic variables from the WORLDCLIM database were used. The vegetation on the mounds and the surrounding savanna differed within all study sites (DCA length of gradient 3.85 SD) and showed complete turnover along the climatic gradient (DCA length of gradient 5.99 SD). Differences between mounds and savanna were significantly related to termite-induced changes in soil parameters, specifically clay enrichment and increased cation concentrations (base saturation). On a local scale, termite-induced differences in soil conditions were found to be the most important factor affecting mound vegetation, while on a regional scale, annual precipitation showed the strongest significant correlations. However, with increasing precipitation, differences between mounds and the surrounding matrix became more pronounced, and the contribution of mounds to local phytodiversity increased. Eleven plant species were identified as characteristic termite mound species. In the more humid parts of the gradient, more characteristic plant species were found that may benefit from favourable soil conditions, good water availability, and a low fire impact in the mound microhabitat.

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Reifenberg, Jean-Marc, Philippe Solano, Burkhard Bauer, Idrissa Kaboré, Gérard Cuny, Gérard Duvallet, and Dominique Cuisance. "Apport de la technique PCR pour une meilleure compréhension de l'épizootiologie des trypanosomoses bovines : exemple de la zone d'aménagement pastoral de Yalé au Burkina Faso." Revue d’élevage et de médecine vétérinaire des pays tropicaux 50, no. 1 (January 1, 1997): 14–22. http://dx.doi.org/10.19182/remvt.9596.

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La technique PCR (polymerase chain reaction) a été utilisée pour l'identificat-ion des trypanosomes chez des glossines et des bovins infectés provenant de la zone d'aménagement pastoral de Yalé, au sud du Burkina Faso. Sur les 84 intestins moyens parasitologiquement positifs de Glossina tachinoides qui ont été analysés, 50 ont pu être identifiés par PCR (Trypanosoma congolens-e types « savane » et « forêt », T. simiae et T. vivax). Chez les bovins, la technique PCR a révélé la prédominance de T. congolense « savane » et de T. vivax. Le taxon « forêt » de T. congolense n'a pas été détecté chez le bétail. Certains animaux aparasitémiques mais suspects ont montré des signaux positifs par PCR avec les amorces spécifiques de T. congolense « savane ». Ces résultats confirment le haut intérêt de la technique PCR pour révéler les pauci-infections et les infections mixtes chez les différents hôte et mettre en évidence des relations complexes d'affinité des taxons « savane » et« forêt » de T. congolense vis-à-vis de leurs vecteurs, mais aussi vis-à-vis de leurs hôtes vertébrés.

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Nielsen, Thomas Theis, and Kjeld Rasmussen. "Utilization of NOAA AVHRR for assessing the determinants of savanna fire distribution in Burkina Faso." International Journal of Wildland Fire 10, no. 2 (2001): 129. http://dx.doi.org/10.1071/wf01015.

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Temporal and spatial patterns of active fires, detected using NOAA AVHRR LAC data, in Burkina Faso are identified and related to vegetation, tree cover and land use classes. Initially, fires are classified into early and late dry season fires (EDSF and LDSF). Early dry season fires are defined as fires occurring earlier than 45 days after the start of the dry season, marked by a levelling out in the post-rainy season temperature increase, determined on the basis of surface temperature data derived from NOAA AVHRR. The date of the start of the dry season, defined in this way, is shown to be a linear function of the latitude. The distribution of fire occurrence are shown to display distinctively different patterns. These distribution patterns are related to information on vegetation class, woody biomass and land use intensity as well as net primary productivity, estimated from NOAA AVHRR rainy season data. It is shown that overall fire frequency and the ratio of early to late dry season fire activity depend strongly on net primary productivity, land use intensity and vegetation class. Late fires tend to occur mainly in agricultural areas, whereas early fires are much more frequent in areas of low land use intensity in the wooded savannas of southern Burkina Faso.

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Drissa, Coulibaly, Yalamoussa Tuo, Mouhamadou Koné, Larba Hubert Balima, Souleymane Konaté, Karl Eduard Linsenmair, Stefan Porembski, Dethardt Goetze, and Katharina Stein. "Savanna woody plants and their provision of food resources to bees in southern Burkina Faso, West Africa." Journal of Forest and Landscape Research 5, no. 1 (October 21, 2020): 14–23. http://dx.doi.org/10.13141/jflr.v5i1.2436.

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West African savanna ecosystems and biodiversity are severely threatened by intensified land use and increasing degradation of natural habitats. Despite the importance of bees for pollinating crops and native plant species little information is available regarding the importance of savanna woody plant species to provide bees with food resources. Flora inventories were carried out on 48 subplots laid out across three land use types. The number of bee morphospecies and their abundance as flower visitors were recorded from inflorescences of plants during the different flowering periods. Out of a total diversity of 82 woody plant species, 53 species (64.63%) from 38 genera and 21 families were melliferous. These plants were visited by bees for foraging nectar and/or pollen. Species of the Combretaceae family were the most visited by bees in terms of individuals (53.85%). Combretum glutinosum alone accounted for 36% of visits. More than half of the melliferous plants (50.94%) were visited for both nectar and pollen. About 32.08% of plants were visited for nectar only (32.08%), while 16.98% were visited for pollen only (16.98%). The majority of savanna plants are flowering in the dry season, but few flowering species can be found throughout the whole year. Savanna woody plant species constitute important food resources for bees, therefore providing a wide range of applications for the development of beekeeping activities in the Sudanian region of West Africa.

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Bliefernicht, J., S. Berger, S. Salack, S. Guug, L. Hingerl, D. Heinzeller, M. Mauder, et al. "The WASCAL Hydrometeorological Observatory in the Sudan Savanna of Burkina Faso and Ghana." Vadose Zone Journal 17, no. 1 (2018): 180065. http://dx.doi.org/10.2136/vzj2018.03.0065.

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Ouédraogo, Amadé, and Adjima Thiombiano. "Regeneration pattern of four threatened tree species in Sudanian savannas of Burkina Faso." Agroforestry Systems 86, no. 1 (March 15, 2012): 35–48. http://dx.doi.org/10.1007/s10457-012-9505-9.

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E. Schmidt-Groh, Susanna, Markus Bernhardt-Römermann, Adjima Thiombiano, and Karen Hahn. "Intraspecific habitat adaptation: How the germinability of herbaceous plant seeds change due to environmental conditions in West African savannas." Flora et Vegetatio Sudano-Sambesica 22 (December 20, 2019): 36–42. http://dx.doi.org/10.21248/fvss.22.81.

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Knowledge about the herbaceous layer in relation to environmental factors in West African savannas is still scarce. Early life-cycle events like germination of the herbaceous species are of special interest, as these stages can play critical roles in establishing of the plants and determine population and community dynamics. We aim to assess intraspecific differences in the germinability of herbaceous savanna species with respect to environmental conditions to reveal adaptations in this early life cycle stage. The study was conducted in the Sudanian savanna of Burkina Faso in West Africa. We collected seeds of two annual herbs (Chamaecrista mimosoides, Spermacoce stachydea) along a climatic gradient from different habitats and land use types and conducted germination experiments under equal conditions in climate chambers. For both species several environmental factors showed a significant impact on the germination rates. While higher precipitation caused an increase in the germination rate only for S. stachydea, habitat conditions had a significant influence for both species. Intermediate habitats with balanced soil moisture caused an enhancement of the germination success. Moreover shrub cover had a positive effect on the germinability of C. mimosoides, whereas the germinability of S. stachydea decreased due to an increasing herbaceous cover. The study showed that certain environmental factors are able to modify the intraspecific variability of the germinability trait, which might affect the establishment of the species populations.

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Solano, Philippe, and S. Amsler Delafosse. "Trypanosoma congolense chez différentes espèces de taons (Diptera : Tabanidae) au Burkina Faso." Revue d’élevage et de médecine vétérinaire des pays tropicaux 48, no. 2 (February 1, 1995): 145–46. http://dx.doi.org/10.19182/remvt.9465.

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Dans la ferme expérimentale du CIRDES, située à Banankélédaga (20 km de Bobo-Dioulasso, Burkina Faso), des zébus Azawak ont été trouvés porteurs de trypanosomes de plusieurs espèces, dont Trypanosoma congolense, alors qu'ils étaient arrivés indemnes six mois auparavant en provenance du nord du pays. Les alentours de cette ferme font l'objet d'un piégeage systématique et, sur une année, seulement 10 glossines ont été capturées, dont aucune n'était infectée dans l'intestin moyen. Dans le même temps, de très nombreux taons sont capturés dans les pièges à glossines, et la dissection de certains d'entre eux a montré la présence de trypanosomes dans leur intestin moyen. Les trypanosomes trouvés chez deux taons ont été identifiés grâce à l'amplification en chaîne par polymérase (ACP) comme étant du type T. congolense forme de savane.

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Amsler, S., J. Filledier, and R. Millogo. "Attractivité pour les Tabanidae de différents pièges à glossines avec ou sans attractifs olfactifs. Résultats préliminaires obtenus au Burkina Faso." Revue d’élevage et de médecine vétérinaire des pays tropicaux 47, no. 1 (January 1, 1994): 63–68. http://dx.doi.org/10.19182/remvt.9134.

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Trois expériences ont été menées en saison sèche au Burkina Faso en zone de savane sub-humide, pour comparer l'efficacité de 5 types de pièges à glossines vis-à-vis des Tabanidae et évaluer l'intérêt de deux attractifs olfactifs. Les pièges NG-2G, F3 et l'écran-piège se sont révélés significativement plus efficaces que les pièges biconique et monoconique classiques avec des captures multipliées par 1,7 à 8,7. Parmi les attractifs olfactifs utilisés, le méta-crésol pur augmente en moyenne les captures de 1,5 fois et l'association méta-crésol/octénol (dans le rapport de 3 pour 1) de 2,5 fois par rapport au piège sans attractifs.

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Lentz, Carola, and Hans-Jürgen Sturm. "Of Trees and Earth Shrines: An Interdisciplinary Approach to Settlement Histories in the West African Savanna." History in Africa 28 (2001): 139–68. http://dx.doi.org/10.2307/3172212.

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For a vegetation geographer and an anthropologist to come together to write on the settlement histories of segmentary societies in the West African savanna is unusual or at least rare. A few words on the origin of this cooperation therefore seem appropriate. For over ten years, in the context of an interdisciplinary research program at the Universität Frankfurt am Main, archeologists, anthropologists, linguists, botanists and geographers have been working together on the history of cultures, languages, and natural environment of the West African savanna, especially the interaction between human activity and the natural environment. That one should actually be speaking in many cases of a culturally mediated “landscape” rather than a “natural environment” is one of the outcomes of the research projects, which have focused mainly on different regions of Burkina Faso (in the sahel and Sudanese zone) and the Lake Chad area of northeast Nigeria.The present paper has emerged from a botanical and an anthropological-historical project on the history of vegetation and of settlement in south and southwest Burkina Faso. This history has been shaped by the great expansion of the Dagara-speaking population. In the last two hundred years (possibly longer), small groups of Dagara patrilineages, related and allied to one another, have migrated north and northwest, probably from the region around Wa in present-day Ghana, and have founded numerous new settlements—a process of land appropriation that is still going on today, though with changed circumstances regarding land rights (see map 1).

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Kristensen, Metus, and Anne Mette Lykke. "Informant-Based Valuation of Use and Conservation Preferences of Savanna Trees in Burkina Faso." Economic Botany 57, no. 2 (April 2003): 203–17. http://dx.doi.org/10.1663/0013-0001(2003)057[0203:ivouac]2.0.co;2.

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Dueppen, Stephen A. "Cattle in the West African savanna: evidence from 1st millennium CE Kirikongo, Burkina Faso." Journal of Archaeological Science 39, no. 1 (January 2012): 92–101. http://dx.doi.org/10.1016/j.jas.2011.09.005.

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Yé, Lambiénou, Jean-Christophe Lata, Hassan Bismarck Nacro, Dominique Masse, and Sébastien Barot. "Effects of livestock on nitrogen and carbon cycling in a savanna in Burkina Faso." Acta Oecologica 110 (May 2021): 103694. http://dx.doi.org/10.1016/j.actao.2020.103694.

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Liu, Jinxiu, Janne Heiskanen, Eduardo Eiji Maeda, and Petri K. E. Pellikka. "Burned area detection based on Landsat time series in savannas of southern Burkina Faso." International Journal of Applied Earth Observation and Geoinformation 64 (February 2018): 210–20. http://dx.doi.org/10.1016/j.jag.2017.09.011.

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SCHMIDT, MARCO, ALEXANDER ZIZKA, SALIFOU TRAORÉ, MANDINGO ATAHOLO, CYRILLE CHATELAIN, PHILIPPE DAGET, STEFAN DRESSLER, et al. "Diversity, distribution and preliminary conservation status of the flora of Burkina Faso." Phytotaxa 304, no. 1 (April 18, 2017): 1. http://dx.doi.org/10.11646/phytotaxa.304.1.1.

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West Africa is a floristically understudied region that is facing severe environmental changes in the 21st century. Basic distribution data and information on the conservation status for most plant species of the region are scarce, and good information only exists for small areas of interest or for key species. This lack of knowledge seriously hampers urgently needed regional conservation efforts. Here we present comprehensive distribution information and preliminary, automated species conservation assessments for the flora of Burkina Faso, a country in tropical West Africa with a flora and vegetation typical for the savanna belt of the region. We documented and analysed the distribution of 1,568 species or 80% of the flora of Burkina Faso based on an expert curated dataset comprising ca. 150,000 occurrence records from herbarium specimens and vegetation surveys. We used this dataset and environmental niche models to calculate three indicator variables for a preliminary, automated conservation assessment. We classified 350 species (18% of the flora, excluding introduced species) as potentially "Critically Endangered", "Endangered", "Vulnerable" or "Near-Threatened" on the national level. The analyses confirmed species-rich areas in the south-west and south-east of the country, and showed a particular concentration of potentially Endangered species in the south. Furthermore, the proportion of potentially Endangered species differed between plant families, growth forms and habitats. Our results set the base for further plant geographical and ecological studies and are a data-driven baseline for further conservation assessments and large scale conservation strategies of the West African flora.

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Caillault, Sébastien, Paul Laris, Cyril Fleurant, Daniel Delahaye, and Aziz Ballouche. "Anthropogenic Fires in West African Landscapes: A Spatially Explicit Model Perspective of Humanized Savannas." Fire 3, no. 4 (November 4, 2020): 62. http://dx.doi.org/10.3390/fire3040062.

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Fire regimes are important components of environmental dynamics, but our understanding of them is limited. Despite recent advances in the methodologies used to remotely sense and map fires and burned areas and new case studies that shed light on local fire use and management practices, the scientific community still has much to learn about anthropogenic fire regimes. We identify two areas for improvement: first, the fine-scale heterogeneity of fire dynamics for specific regions is often masked by global-scale approaches, and second, barriers between the disciplines focusing on fire impacts hamper the development of knowledge of the human dimensions of fire regimes. To address the “blind spot” that these limitations create, we present a simple dynamic model of fire ignition in savanna systems. The aim is to connect the local and global scales of fire regimes by focusing on human fire management (anthropogenic fire). Our dynamical model is based on a study area in Western Burkina Faso and integrates biophysical elements (climate and soil data), land cover, and fire management scenarios based on field surveys. The simulation results offer contrasting views of the impact of local fire management practices on regional fire regimes observed in savannas. Fire density and frequency are local variables that clearly change the fire regimes despite a complex and constrained biophysical system. This experience, drawing from fieldwork and modelling, may be a way to integrate some key aspects of anthropogenic fire research in savanna systems.

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Bougma, Amelie B., Korodjouma Ouattara, Halidou Compaore, and Hassan B. Nacro. "Soil moisture in forest island and adjacent ecosystems in Sub-Saharan Region." International Journal of Biological and Chemical Sciences 14, no. 9 (March 25, 2021): 3323–40. http://dx.doi.org/10.4314/ijbcs.v14i9.28.

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Forest islands are widely distributed throughout West Africa savanna landscape. Stated as direct outcome of anthropogenic activity, these mosaics are often found around villages and are known for their unique and luxuriant characteristics of tropical rainforest. Althought significant studies focus on their ecology, works on edaphic factors that govern their establishment are very scare. The objective of the current study was to evaluate soil moisture dynamics in forest islands compared to that of surrounding savannas and farmlands at five sites located along a precipation gradient in Burkina Faso. For two years, from 2016 to 2017, soil moisture was monitored at a depth of 0-80 cm using a neutron probe. The results highlighted a seasonal pattern ranging from 42±2% during the heavy rainy month (August) to 16±1% during the dry season (October-November). Significant differences in soil moisture content soil water profile and water stock at depth 0 to 80 cm were recorded between locations and land use patterns. In general, soil moisture was on average 58% less in forest island than in croplands across sites. Soil moisture content was lower in topsoil (0-20 cm) compared to deeper soil (40-80 cm). The Study demonstrated evident link of soil moisture dynamic with rainfall and the vegetation pattern.

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Sanou, L., P. Savadogo, Eugene E. Ezebilo, and A. Thiombiano. "Drivers of farmers’ decisions to adopt agroforestry: Evidence from the Sudanian savanna zone, Burkina Faso." Renewable Agriculture and Food Systems 34, no. 2 (July 4, 2017): 116–33. http://dx.doi.org/10.1017/s1742170517000369.

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AbstractIn most developing countries, there has been a long-standing conflict of interest between using land for agriculture and the conservation of biodiversity. This paper reports on a study of factors influencing farmers’ decisions to integrate trees into their agricultural practice. We also discuss the possibility of protecting and managing planted and naturally regenerating trees on farmland in order to restore degraded land and improve biodiversity. Data were collected from interviews with farmers in the Center-West region of Burkina Faso and analyzed using Principal Component Analysis, multiple linear regression and binary logistic regression. The results show that farmers’ decisions to incorporate trees into their farmland were mainly influenced by silvicultural knowledge and skills, participation in farmers’ groups or other social organizations with an interest in tree conservation, the social value of biodiversity in the rural landscape, and the perceived economic benefits of trees on farmland. The most important factors associated with variation in levels of motivation to conserve trees on farms included household wealth, gender, age, education level, marital status, residence status, farmland size, household size and technical support. We conclude that an agroforestry project will be more successful if the local biophysical conditions and diversity of smallholder socio-economic characteristics and their perceptions, needs and preferences are considered in its design. There is also an immediate need for coordinated development of information and training to raise local community awareness of the potential of agroforestry as well as to disseminate information about adding value to tree products in order to encourage farmers to protect on-farm trees.

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Devineau, Jean-Louis. "Generalist versus specialist: a contrasted sociology of woody and herbaceous species in a fallow-land rotation system in the West African savanna (Bondoukuy, Western Burkina Faso)." Phytocoenologia 35, no. 1 (April 15, 2005): 53–78. http://dx.doi.org/10.1127/0340-269x/2005/0035-0053.

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Doamba, SWMF, P. Savadogo, and HB Nacro. "Rôle des feux de savane sur les caractéristiques biogéochimiques des sols en zone soudanienne du Burkina Faso." International Journal of Biological and Chemical Sciences 8, no. 2 (September 2, 2014): 777. http://dx.doi.org/10.4314/ijbcs.v8i2.34.

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Ouedraogo, Wendsom Osée, Alain P. K. Gomgnimbou, Saïdou Santi, Daniel Ilboudo, and Aboubacar Toguyeni. "Quantification de la Biomasse et stockage du carbone du massif forestier de l’Ecole Nationale des Eaux et Forêts de Dindéresso province du Houet au Burkina Faso." International Journal of Biological and Chemical Sciences 13, no. 7 (February 13, 2020): 3276–88. http://dx.doi.org/10.4314/ijbcs.v13i7.24.

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La dégradation forestière provoque la perte de carbone et contribue indirectement au changement climatique. Afin d’évaluer la contribution du massif forestier de l’Ecole Nationale des Eaux et Forêts (ENEF) à l’atténuation du changement climatique, une étude d’estimation du stock de carbone a été menée. Dans cette étude, la quantité de carbone ligneux a été estimée dans des placettes carrées de 900 m2 pour la savane, 400 m2 pour la plantation de Tectona (P Teck) et 2500 m2 en zone agroforestière (Z Agf). L’équation de type polynomial et le modèle allométrique ont été utilisés pour l’évaluation du stock de carbone. Dans la savane, le carbone stocké dans la biomasse épigée s’élève à 17,66 ± 22,05 tC/ha et celui de la biomasse hypogée ainsi que de la végétation herbacée ont été respectivement de 2,28 ± 2,41 tC/ha et de 1,39 ± 0,61 tC/ha. Au niveau de la plantation de teck et de la zone agroforestière, les quantités de carbone contenues dans la biomasse aérienne ligneuse ont été respectivement de 54,38 ± 12,04 tC/ha et 2,50 ± 3,28 tC/ha contre 7,09 ± 1,40 tC/ha et 0,35 ± 0,42 tC/ha dans les racines. Cette étude contribue à la compréhension de l’apport de la savane, de la plantation et du système agroforestier ; à la séquestration du carbone. Des actions de renforcement du potentiel ligneux de cet écosystème s’imposent pour minimiser la dégradation de ce site à long terme et afin qu’il soit une source durable de séquestration du carbone. .Mots clés : Biomasse, stock de carbone, changement climatique, savane, zone soudanienne, Burkina Faso. Forests degradation causes carbon loss and contributes indirectly to climate change. In order to estimate the contribution of the forest of ENEF (called Ecole Nationale des Eaux et Forêts) forest in the mitigation of climate change, a work based on carbon stock in the forest was implemented. In this study, the quantity of ligneous carbon was estimated in some squares of 900 m 2 for the savannah, 400 m2 for the Tectona plantation (P Teck) and 2500 m2 for the agroforestry area (Z Agf). The equation polynomial and the allometric standard were used to evaluate carbon storage. In savannah, the carbon stocked in above ground biomass was 17.66 ± 22.05 tC/ha. The contribution roots and herbaceous is respectively 2.28 ± 2.41 tC/ha and 1.39 ± 0.61 tC/ha. In teak plantation and agroforestery land, the carbon stocked in AGB was respectively 54.38 ± 12.04 tC/ha and 2.50 ± 3.28 tC/ha. Concerning the roots, it is respectively 7.09 ± 1.40 tC/ha and 0.35 ± 0.42 tC/ha. The actions to strengthen the wood potential of this ecosystem are needed to minimize the degradation of this site in the long term and to be a source of carbon sequestration.Keywords : Biomass, carbon storage, climate change, savannah, soudanian zone, Burkina Faso.

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44

Assédé, Emeline P. S., Aristide C. Adomou, and Brice Sinsin. "Magnoliophyta, Biosphere Reserve of Pendjari, Atacora province, Benin." Check List 8, no. 4 (August 1, 2012): 642. http://dx.doi.org/10.15560/8.4.642.

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The Biosphere Reserve of Pendjari is an example of best management practice of protected areas in West Africa with typical Sudanian savanna vegetation. It is part of the vast and transboundary protected areas of W, Pendjari and Arly National Parks of Benin, Burkina Faso and Niger. This work provides an overview of the flora of the reserve by means of a thorough botanical inventory. The plant species composition is typical of Sudanian savanna. We recorded 684 plant species, which were distributed among 366 genera and 89 families. The two most species-rich families were Fabaceae (115) and Poaceae (112). The most important life forms were phanerophytes and therophytes. The chorological spectrum was dominated by Sudanian species. With Ipomoea beninensis Akoègninou, Lisowski and Sinsin, Thunbergia atacorensis Akoègninou and Lisowski and Cissus kouandeensis A.Chev., three endemic species of Benin were recorded, demonstrating the importance of the reserve for plant conservation.

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Michel, Andrew P., Olga Grushko, Wamdaogo M. Guelbeogo, Neil F. Lobo, N'Fale Sagnon, Carlo Costantini, and Nora J. Besansky. "Divergence With Gene Flow in Anopheles funestus From the Sudan Savanna of Burkina Faso, West Africa." Genetics 173, no. 3 (April 28, 2006): 1389–95. http://dx.doi.org/10.1534/genetics.106.059667.

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van Straaten, Oliver, Sabine W. M. F. Doamba, Marife D. Corre, and Edzo Veldkamp. "Impacts of burning on soil trace gas fluxes in two wooded savanna sites in Burkina Faso." Journal of Arid Environments 165 (June 2019): 132–40. http://dx.doi.org/10.1016/j.jaridenv.2019.02.013.

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47

Nygård, Robert, Louis Sawadogo, and Björn Elfving. "Wood-fuel yields in short-rotation coppice growth in the north Sudan savanna in Burkina Faso." Forest Ecology and Management 189, no. 1-3 (February 2004): 77–85. http://dx.doi.org/10.1016/j.foreco.2003.07.030.

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Stith, Mimi, Alessandra Giannini, John del Corral, Susana Adamo, and Alex de Sherbinin. "A Quantitative Evaluation of the Multiple Narratives of the Recent Sahelian Regreening*." Weather, Climate, and Society 8, no. 1 (January 1, 2016): 67–83. http://dx.doi.org/10.1175/wcas-d-15-0012.1.

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Abstract A spatial analysis is presented that aims to synthesize the evidence for climate and social dimensions of the “regreening” of the Sahel. Using an independently constructed archival database of donor-funded interventions in Burkina Faso, Mali, Niger, and Senegal in response to the persistence of drought in the 1970s and 1980s, the spatial distribution of these interventions is examined in relation to population density and to trends in precipitation and in greenness. Three categories of environmental change are classified: 1) regions at the northern grassland/shrubland edge of the Sahel where NDVI varies interannually with precipitation, 2) densely populated cropland regions of the Sahel where significant trends in precipitation and NDVI decouple at interannual time scales, and 3) regions at the southern savanna edge of the Sahel where NDVI variation is independent of precipitation. Examination of the spatial distribution of environmental change, number of development projects, and population density brings to the fore the second category, covering the cropland areas where population density and regreening are higher than average. While few, regions in this category coincide with emerging hotspots of regreening in northern Burkina Faso and southern central Niger known from case study literature. In examining the impact of efforts to rejuvenate the Sahelian environment and livelihoods in the aftermath of the droughts of the 1970s and 1980s against the backdrop of a varying and uncertain climate, the transition from desertification to regreening discourses is framed in the context of adaptation to climate change.

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Savadogo, Patrice, Saïdou Santi, Sidzabda Djibril Dayamba, Hassan Bismark Nacro, and Louis Sawadogo. "Seasonal variation in fire temperature and influence on soil CO2 efflux, root biomass, and soil water properties in a Sudanian savanna - woodland, West Africa." Soil Research 50, no. 3 (2012): 195. http://dx.doi.org/10.1071/sr12031.

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Savanna ecosystems are shaped mainly by fires, the consequences of which depend on both their intensities and the season in which they occur. The effects of fire disturbance on key soil parameters are still largely unknown, yet the knowledge of those effects are crucial to our understanding and management of savanna ecosystems. This study was aimed at determining seasonal variations in fire temperature and the influence of fire on soil respiration, root biomass, and soil water infiltration. It was conducted on long-term experimental plots established in 2006 in the savanna–woodland of Burkina Faso. Four fire treatments were applied: no fire, early fire, mid dry-season fire, and late dry-season fire. The results indicated that the average maximum temperature and the residence time of the lethal temperature varied significantly (P < 0.05) depending on the season of fire occurrence, the location of the soil probe, and the interaction between these two factors. The duration of heating above the critical temperature threshold was generally longest at ground level. The season in which fire occurred significantly (P ≤ 0.001) affected soil respiration, soil root biomass, and soil water infiltration. In conclusion, although fire can be used as a management tool in the savanna, the effects of fire on soil should be considered.

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Qasim, Mohammad, Stefan Porembski, Dietmar Sattler, Katharina Stein, Adjima Thiombiano, and André Lindner. "Vegetation Structure and Carbon Stocks of Two Protected Areas within the South-Sudanian Savannas of Burkina Faso." Environments 3, no. 4 (September 29, 2016): 25. http://dx.doi.org/10.3390/environments3040025.

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Journal articles on the topic 'Savanes – Burkina Faso'

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