Publications (408)
ARTICLE
Contrasting impacts of grass species on nitrogen cycling in a grazed Sudanian savanna
Lambiénou Yé, Luc Abbadie, Gérard Bardoux, Jean‐Christophe Lata, Hassan Bismarck Nacro, Dominique Massé, Henri De Parseval, Sébastien Barot
We investigated the impact of perennial and annuals grass species on nitrogen cycling in a Sudanian savanna of Burkina Faso. We also analysed how the local context in terms of grazing and soil properties modifies these impacts. We selected four plots differing both by the intensity of grazing by cattle and soil depth, and used soil and grass b(...)
Perennial plant, Cycling, Agronomy, Pasture, Grazing, Environmental science, Nitrogen cycle, Grazing pressure, Leaching (pedology), Soil fertility, Nitrogen, Soil water, Biology, Geography, Soil science, Forestry, Chemistry, Burkina Faso, Herbivore, Annual grass, Nitrogen cycling, Perennial grass, Savanna, 15N
ARTICLE
Population Structure in Natural Stands, Seed Germination and Seedling Growth of Sterculia setigera under Nursery Conditions in Burkina Faso (West Africa)
Philippe Bayen, Anne Mette Lykke, Amadé Ouédraogo, Adjima Thiombiano
The present study aimed at evaluating S. setigera population structure in natural stands and estimating the effect of pretreatment methods on seeds’ germination capacity and seedling establishment. Dendrometrical measurements were performed on 504 S. setigera trees for population structure assessment. The bell shaped structure obtained indicat(...)
Seedling, Germination, Biology, Horticulture, Population, Natural population growth, Agronomy, Botany, Geography, Demography
ARTICLE
Population structure in natural sands, seed germination and seedling growth of Sterculia setigera trees under nursery conditions in Burkina Faso (West Africa)
Philippe Bayen, Anne Mette Lykke, Ouédraogo, Amadou, Adjima Thiombiano
The present study aimed at evaluating S. setigera population structure in natural stands and estimating the effect of pretreatment methods on seeds’ germination capacity and seedling establishment. Dendrometrical measurements were performed on 504 S. setigera trees for population structure assessment. The bell shaped structure obtained indicat(...)
Seedling, Germination, Botany, Population, Geography, Biology, Horticulture, Demography
ARTICLE
FIRST DETECTION OF SHV-TYPE EXTENDED SPECTRUM Β-LACTAMASES IN THE UNIVERSITY HOSPITAL COMPLEX PAEDIATRIC CHARLES DE GAULLE (CHUP-CDG) OF OUAGADOUGOU IN BURKINA FASO
METUOR DABIRE Amana, ZONGO K.Jacob, ZEBA Boukaré, TRAORE/OUEDRAOGO Rasmata, MOUSSAWI Jihad, BAUCHER Marie, EL JAZIRI Mondher
Strains were isolated from urines clinical samples from patients from various service units of University Hospital complex Paediatric Charles De Gaulle (CHUP-CDG) in Burkina Faso. These strains were resistant to at least one oxyimino-cephalosporin. They were identified as producer of extended spectrum β-lactamases (ESBL) by double-disk syner(...)
SHV-type extended spectrum β-lactamases, University hospital complex paediatric charles de gaulle.
ARTICLE
Impact de l’artisanat minier sur les sols d’un environnement agricole aménagé au Burkina Faso
Ousmane BAMBA, Souleymane PELEDE, Aboubakar SAKO, Nicolas KAGAMBEGA Mariette Y. W. MININGOU
Au Burkina Faso, l’orpaillage contribue aux revenus des populations rurales. Cependant, cette activité utilise des technologies mal adaptées qui causent des impacts négatifs sur l'environnement et les ressources naturelles, en l’occurrence les sols. Dans un contexte du cours de l’or favorable, le nombre de mines artisanales s’est accru et il e(...)
sol ; unités morphopédologiques ; orpaillage ; environnement
ARTICLE
Resistances to the oxyimino-cephalosporins by CTX-M-15 producing klebsiella isolated from the urines samples of patients in the university hospital complex paediatric charles de gaulle (chup-cdg) of ouagadougou in burkina faso
METUOR DABIRE Amana, ZONGO K. Jacob, ZEBA Boukaré, MOUSSAWI Jihad, BAUCHER Marie, EL JAZIRI Mondher
Seventeen oxyimino-cephalosporins-resistant Klebsiella strains were isoleted from urines clinical samples from patients from various service units of University Hospital complex Paediatric Charles De Gaulle (CHUP-CDG) in Burkina Faso. These strains were resistant to at least one oxyimino-cephalosporin. They were identified as producer of exten(...)
β-lactamases, CTX-M-15, ESBL, Oxyimino-Cephalosporins, Klebsiella
ARTICLE
Elephants or Excrement? Comparison of the Power of Two Survey Methods for Elephants in West African Savanna
Emmanuel M. Hema, R. F. W. Barnes, Wendengoudi Guenda
Statistical power is the key issue when evaluating wildlife trends. Wildlife managers in West Africa lack light aeroplanes and must often estimate wildlife trends on foot, either by counting the animals themselves or by counting their dung. We compared direct ground counts of elephants and dung counts in two consecutive years in Nazinga Game R(...)
Transect, Wildlife, Geography, Woodland, Habitat, Aerial survey, Ecology, Biology, Cartography
ARTICLE
Distribution of savannah elephants (Loxodonta africana africana Blumenbach 1797) within Nazinga game ranch, Southern Burkina Faso
Emmanuel M. Hema, R. F. W. Barnes, Wendengoudi Guenda
We tested the hypothesis that elephant distribution inside the Nazinga Game Ranch (Southern Burkina Faso) during the wet season is influenced by villages outside, while in the dry season elephants are restricted only by water. Occupancy was evaluated by recording elephant dung-piles on 54 line transects in each of three seasons: wet 2006, dry(...)
Dry season, Geography, Transect, Wet season, Forestry, Occupancy, African elephant, Ecology, Biology, Cartography
ARTICLE
Rare earth and trace element geochemistry of termite mounds in central and northeastern Namibia: Mechanisms for micro-nutrient accumulation
Aboubakar Sako, Anthony J. Mills & Alakendra N. Roychoudhury
Rare earth element (REE) and trace element concentrations of ten termite mounds and adjacent topsoil from central and northeastern Namibia were used to investigate the processes underlying the alteration of soil chemical and physical properties by termites (Macrotermes spp.). Accumulation of micro-nutrients in the mounds was of particular inte(...)
Trace elements, Macrotermes, REE, Topsoil, Termite mounds, Caprivi Strip
ARTICLE
Comparison of two dung count methods for estimating elephant numbers at Kakum Conservation Area in southern Ghana
Yaw Agyeman Boafo, Mildred Manford, R. F. W. Barnes, Emmanuel M. Hema, Emmanuel Danquah, Awo Nandjui, Umaru-Farouk Dubiure
The efficiency of meandering transects—in terms of accuracy, precision and effort required for estimating elephant abundance—was evaluated in the Kakum Conservation Area in Ghana. Four consecutive elephant dung surveys were carried out between February 2000 and February 2002 using meandering transects. The resulting dung density estimates were(...)
Geography, African elephant, Wildlife conservation, Nature Conservation, Fishery, Ecology, Agroforestry, Wildlife, Environmental science, Biology
ARTICLE
Adsorption and surface complexation modeling of palladium, rhodium and platinum in surficial semi-arid soils and sediment
Aboubakar Sako, Lidia Lopes & Alakendra N. Roychoudhury
Sorption isotherms, time-dependent adsorption and surface complexation modeling studies were used to investigate the post-depositional mobility of three of the platinum group-elements (Pd, Rh, and Pt) in semi-arid soil and sediment samples with varying surface properties. The acidity constants (Log Ka1 and Log Ka2), optimized from batch titrat(...)
Adsorption, soil geochemistry, modeling, semi-arid soils, platinum group
ARTICLE
Stable Oxygen and Carbon Isotopic Compositions of Lates stappersii Otoliths from Lake Tanganyika, East Africa
Aboubakar Sako, Kenneth G. MacLeod, and Catherine M. O’Reilly
In this study, we measured growth trends in oxygen and carbon isotopic ratios in whole sagittal otoliths from three adult centropomid fish (Lates stappersii) from each of three sub-basins of Lake Tanganyika, East Africa. Sampling density was 20 to 50 samples per otolith. Both d 18C values increase with age. The d 18O and d 13O data suggest tha(...)
Ontogeny, d 13O, temperature, growth profiles, sub-basins, ambient environment C and d 183
ARTICLE
Crop-raiding elephants and the moon
BARNES, R.F.W., DUBIURE, U.F., DANQUAH, E., BOAFO, Y., NANDJUI, A., HEMA, M.E., MANFORD, M. 2006
Consulter l'article
Crop-raiding elephants; moon
ARTICLE
Distribution des éléphants autour d’une mare sahélienne en relation avec le cheptel domestique et la végétation ligneuse
BARNES, R.F.W., HEMA, M.E. & DOUMBIA, E.
Consulter l'article
Eléphants, Distribution, sahélienne, cheptel domestique, végétation ligneuse
ARTICLE
Risk of crop raiding by elephants around the Kakum Conservation Area, Ghana
R. F. W. Barnes, Emmanuel M. Hema, Awo Nandjui, Mildred Manford, Umaru-Farouk Dubiure, Emmanuel Danquah, Yaw Agyeman Boafo
This Augsut 2000-September 2002 study monitored crop damage by elephants in the vicinity of Kakum CA. The Conservation Area, comprised of about 370 sq kms formerly known as Kakum NP and Attandanso FR, has a population of about 220 elephant. The forest in the protected area is a fragment of the lowland forest the once occupied much of southwest(...)
Nature Conservation, Geography, Agroforestry, Crop, Wildlife conservation, Environmental protection, Wildlife, Forestry, Ecology, Environmental science, Biology