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Abundance and Distribution of Macroinvertebrates of the Affon River in Bénin

Open Journal of Marine Science 2019年第4期9卷 173-187页

作者： Olakonlé Serge Samon Fadéby Modeste Gouissi David Darius Adje Koudjodé Simon Abahi Christelle Madina Tchaou Jeff Gildas Antoine Okoya Zoulkanerou Orou Piami Midogbo Pierre Gnohossou gbenga omoniyi Christophe Piscart Department of Management of Natural Resources (AGRN) Water and Soil Engineering Laboratory of Ecology Health and Animal Production (LESPA) Faculty of Agronomy (FA) University of Parakou (UP) Parakou Benin Univ Rennes CNRS ECOBIO UMR Rennes France

This study focuses on the biodiversity of macroinvertebrates of the Affon River. To reach this goal, eight stations were sampled and physical parameters such as temperature, pH, conductivity, transparency, depth, total dissolved solids (TDS) and dissolved oxygen were measured. Chemical parameters such as ammonium nitrite and phosphate were measured in the laboratory. We identified 9755 macroinvertebrates belonging to 4 classes, 14 orders, and 49 families. Chironomidae were the most abundant family whereas other sensitive insect’s orders such as Ephemeroptera, Trichoptera, and Plecoptera were rarely found, suggesting a poor water quality of the Affon River. The principal components analysis yielded three groups of stations: the first group (Tenéka 2 and 3) characterized by high values of ammonium and phosphate and low values of conductivity and TDS;the second group (Tanéka 1 and Kolokondé 1) with low values of pH, transparency, ammonium and phosphate;and the third group of stations (Kolokondé 2, Kpébouko1, Kpébouko 2, and Affon) marked by high values of conductivity, TDS, transparency, depth and temperature. This study is a crucial step for any management and monitoring of the Affon River.

关键词： West Africa Freshwater Water Quality Monitoring

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Spatio-Temporal Analysis of AWs in Akure, Nigeria

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Chinese Journal of Urban and Environmental Studies 2016年第3期4卷 81-95页

作者： Godwin gbenga OLONIYO Joseph omoniyi BASORUN Department of Urban and Regional Planning School of Environmental Technology The Federal University of Technology

Urbanization is on the increase globally, due to the movement of people from rural to urban *** rapid increase in urban population has led to the corresponding increase in the use of vehicles and number of automobile workshops(AWs) in Akure. The study area is made up of four political wards with 511 registered mechanics of which 20% are randomly selected for data ***-Wallis statistical tool is used in data analysis. Findings reveal that a majority of the AWs are located on the road setbacks and under power line within the residential neighbourhoods while the existence of automobile spare part shops is the major factor driving their concentration.A significant variation in the spatial distribution of AWs in the political wards of the study area is also discovered. This paper, therefore, recommends establishing a partnership between the government and private organizations on the development of mechanic villages and the enactment of laws restraining automobile mechanics from performing their services out of the confines, so as to ensure a pleasant living environment for residents.

关键词： Automobile workshops residential environment spatial analysis

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