Bats (Chiroptera) of Burkina Faso: preliminary list with fifteen first record species

Based on a fine review of bat literature in Burkina Faso, we identified the south-western and southeastern parts of the country as gap regions where a study that aims to fill gap in bat diversity estimation could be conducted. In total, 72 sampling sites distributed in 32 localities were surveyed between April 2008 and September 2009. 407 mist nets-nights of 12 and 6 m were used for a total effort of 2937.3 net-hours. 1639 specimens were capture in total distributed in 45 species, 22 genera and 9 families. 15 species including 2 frugivorous and 13 insectivorous were recorded for the first time in Burkina Faso. These new species recorded increased the bats diversity of Burkina Faso from 36 to 51.Keywords: Bats, capture, first records, species richness, Burkina Faso

Étude des genres Actinotaenium (Näg.) Teiling et Cosmarium Corda ex Ralfs,/i> (Desmidiaceae/Chlorophyta) dans les mares temporaires des régions du Centre, de l’Est et du Nord du Burkina Faso

De nombreux travaux de systématique des micro-algues faits auparavant, ont concerné les genres Actinotaenium et Cosmarium dans certaines régions d’Afrique, particulièrement en Afrique centrale et de l’ouest. Au Burkina Faso, les travaux précédents sur la systématique des micro-algues ont généralement concerné l’ensemble des genres de chlorophyta prenant en compte les genres Cosmarium et Actinotaenium. Cependant, il n’y a pas encore eu d’études sur les micro-algues de mares temporaires. Une observation d’échantillons de phytoplancton récoltés dans des mares du centre, de l’est (zone soudanienne) et nord (zone sahélienne) du Burkina Faso en période hivernale de 2007, 2008 et 2009 a permis de rencontrer 39 espèces des genres Actinotaenium et Cosmarium dont 23 nouvelles pour le Burkina Faso. La description des taxons donnée permet de compléter la connaissance de la microflore dulçaquicole de l’Afrique de l’Ouest en général et du Burkina Faso en particulier. Les espèces nouvelles s’ajoutent à environ 67 taxons de Cosmarium et 641 de tous les genres confondus et qui avaient été déjà répertoriés au Burkina Faso avant ce travail. Parmi les espèces, les formes cosmopolites sont dominantes. Elles se rencontrent dans des étangs caractérisés par des eaux acides, alcalines et oligotrophes

APPLICATION DES MÉTHODES STATISTIQUES À L’ÉTUDE HYDROCHIMIQUE DES EAUX D’UN HYDROSYSTÈME TROPICAL : CAS DU BASSIN VERSANT DE LA RIVIÈRE ZIO (TOGO)

Zio River is the only perennial river of Lake Togo basin. It passes through many urban areas including capital Lomé which it receives discharges of all kinds and subjected to several human pressures. This study aims to characterize the physicochemical quality of water from the source to the river mouth, identify pollution sources and highlight the impact of human activities on these waters quality. For this purpose water samples were taken during four times at each site and Physicochemical analyzes were done in the laboratory according to AFNOR methods. The results of these analyzes were accompanied by statistical analysis. Principal Component Analysis identified parameters influenced by human activities or effluents and those related to mineralization process. Factor scores of sampling sites on the bidimensional plane (F1XF2) showed increasing pollution or disturbance gradient of sites from upstream to downstream. Physicochemical quality study reveals that sites located at upstream are good quality, record the highest levels of dissolved oxygen (6 to 14.6 mgO2 / L) and are suitable for any purpose contrary to downstream sites waters, degraded by human activities and record lower levels of dissolved oxygen (0.6mgO2/L). Piper diagram showed dominance of Ca-HCO3 water type with the presence of Na-HCO3 water type and a few Na-Cl water type

APPLICATION DES MÉTHODES STATISTIQUES À L’ÉTUDE HYDROCHIMIQUE DES EAUX D’UN HYDROSYSTÈME TROPICAL : CAS DU BASSIN VERSANT DE LA RIVIÈRE ZIO (TOGO)

Zio River is the only perennial river of Lake Togo basin. It passes through many urban areas including capital Lomé which it receives discharges of all kinds and subjected to several human pressures. This study aims to characterize the physicochemical quality of water from the source to the river mouth, identify pollution sources and highlight the impact of human activities on these waters quality. For this purpose water samples were taken during four times at each site and Physicochemical analyzes were done in the laboratory according to AFNOR methods. The results of these analyzes were accompanied by statistical analysis. Principal Component Analysis identified parameters influenced by human activities or effluents and those related to mineralization process. Factor scores of sampling sites on the bidimensional plane (F1XF2) showed increasing pollution or disturbance gradient of sites from upstream to downstream. Physicochemical quality study reveals that sites located at upstream are good quality, record the highest levels of dissolved oxygen (6 to 14.6 mgO2 / L) and are suitable for any purpose contrary to downstream sites waters, degraded by human activities and record lower levels of dissolved oxygen (0.6mgO2/L). Piper diagram showed dominance of Ca-HCO3 water type with the presence of Na-HCO3 water type and a few Na-Cl water type

Suitability of groundwater and surface water for drinking and irrigation purpose in Zio River Basin (Togo)

Zio River basin plays a particular importance as a potential water resource for irrigation, drinking and for other various purposes relating to socioeconomic activities. These socioeconomic activities considerably change water quality and quantity in this basin. An investigation was carried out by collecting 52 groundwater samples and 168 surface water samples during four sampling campaigns to assess the water quality with respect to drinking and irrigation uses. In situ parameters such as pH, Electrical Conductivity (EC), Temperature, dissolved oxygen (O2) and Total Dissolved Sells (TDS) were measured using a multiparameter portable apparatus (model HANNA). Major cations and anions, nutrients and suspended materials (MES) were determined in the laboratory using AFNOR methods. Water quality for irrigation purpose were determined by sodium absorption ratio, soluble sodium percentage (SSP), magnesium adsorption ratio (MAR), Kelly’s ratio (KR), permeability index (PI), residual sodium bicarbonate (RSC) to investigate an eventual ionic toxicity of water on soil and plants. In this study, HCO3- is preponderant in surface water samples and groundwater is dominated by Na+ and Cl-. More than 50% of groundwater could present an unfavorable effect on crop yield, on soil and on human health, particularly during the low water flow. Comparing irrigation indices values obtained from target study to conventional limits we note that about 95% of surface water samples are suitable for irrigation. Principal component analysis performed on irrigation parameters of 220 water samples show that in the study area we can use mainly, SAR, EC, PI and MAR to evaluate all qualitative aspects of water for irrigation use.Keyswords: Agriculture, quality, irrigation parameter, Zio River, Tog