The protection of biodiversity which had long been bounded up with emblematic “natural” spaces is now increasingly focusing on ordinary biodiversity and rural agricultural land and forests as well as on urban and pe...The protection of biodiversity which had long been bounded up with emblematic “natural” spaces is now increasingly focusing on ordinary biodiversity and rural agricultural land and forests as well as on urban and peri-urban spaces. Such ordinary biodiversity has its own specific features which make it both a relative and uncertain topic of research. Traditional nature protection instruments do not work on this dimension of the planet’s living tissue and new tools need to be deployed in conjunction with regional and local stakeholders that will provide long-term sustainable solutions for biodiversity and for local and regional development more generally. Research conducted on the Plateau de Millevaches explores the possibilities for shared caring for this biodiversity.展开更多
Atmospheric dynamics and climatology in West Africa are strongly dominated by the latitudinal migration of the ITCZ which imposes directly or indirectly determinism on coastal ecosystems. Thus, the Grand-Lahou lagoon ...Atmospheric dynamics and climatology in West Africa are strongly dominated by the latitudinal migration of the ITCZ which imposes directly or indirectly determinism on coastal ecosystems. Thus, the Grand-Lahou lagoon system and its watershed are influenced by the ITCZ, whose seasonal study made it possible to understand its mode of action first on climatic factors, then hydroclimatic, and finally hydrological in the context of global changes. The study of these factors showed a differentiated impact of its migration on the hydrological regime defining a new configuration of the lagoon system and beyond;the coastal ecosystems of the northern coast of the Gulf of Guinea irrigated by numerous fluvial inputs. Salinity, a hydrological parameter of critical ecosystem importance, combined with transparency and depth, has enabled the spatio-temporal description of hydrology. To do this, a series of monthly measurements (in-situ) for spatial coverage of 25 stations was tested. Long before that, the climatic and hydroclimatic parameters were obtained respectively at SODEXAM, the meteorological site earth.nullschool.net and ONADE. This study brought together the dynamics of the ITCZ and the hydrological system of the lagoon.展开更多
The present contribution aims at helping the Mayors to implement a less expensive and effective system of management of household refuse to Yopougon. Indeed, the incapacity of service providers to be assured the colle...The present contribution aims at helping the Mayors to implement a less expensive and effective system of management of household refuse to Yopougon. Indeed, the incapacity of service providers to be assured the collection of the garbage and the failure of their systems of pre-collection favored the emergence of the informal private precollectors in the municipality of Yopougon. The regularity of the interventions of these new actors, the affordable cost of their services and the living environment daily freed the garbage incites the households to request them because they succeed better where service providers failed. Such an activity will have to be better organized because of supplier employment.展开更多
The purpose of this study is to assess the state of contamination of fish in the S? River by trace metal elements including Zinc, Lead, Cadmium, Copper and Arsenic. Water samples and four species of both sexes (Claria...The purpose of this study is to assess the state of contamination of fish in the S? River by trace metal elements including Zinc, Lead, Cadmium, Copper and Arsenic. Water samples and four species of both sexes (Clarias anguillaris, Kribia kribensis, Tilapia guineensis and Eleotris vittata) were collected and analyzed. The pH, temperature and values of the chemical species present in the water of the S? River characterize an ecosystem favorable to the growth of aquatic species. The Metallic Traces Elements (MTE) concentrations vary from one fish species to another and depend on the sex and age of the animal. Zinc and copper are more concentrated in males than females with the exception of copper in Tilapia. The Pb concentration is higher in young Kribia and Clarias as well as Zn and Cd in young Tilapia. The concentrations in Cd and Pb are well above the European standards and those in the Republic of Benin, worrying results that express a health toxicity risk related to the consumption of fish of the river S?.展开更多
文摘The protection of biodiversity which had long been bounded up with emblematic “natural” spaces is now increasingly focusing on ordinary biodiversity and rural agricultural land and forests as well as on urban and peri-urban spaces. Such ordinary biodiversity has its own specific features which make it both a relative and uncertain topic of research. Traditional nature protection instruments do not work on this dimension of the planet’s living tissue and new tools need to be deployed in conjunction with regional and local stakeholders that will provide long-term sustainable solutions for biodiversity and for local and regional development more generally. Research conducted on the Plateau de Millevaches explores the possibilities for shared caring for this biodiversity.
文摘Atmospheric dynamics and climatology in West Africa are strongly dominated by the latitudinal migration of the ITCZ which imposes directly or indirectly determinism on coastal ecosystems. Thus, the Grand-Lahou lagoon system and its watershed are influenced by the ITCZ, whose seasonal study made it possible to understand its mode of action first on climatic factors, then hydroclimatic, and finally hydrological in the context of global changes. The study of these factors showed a differentiated impact of its migration on the hydrological regime defining a new configuration of the lagoon system and beyond;the coastal ecosystems of the northern coast of the Gulf of Guinea irrigated by numerous fluvial inputs. Salinity, a hydrological parameter of critical ecosystem importance, combined with transparency and depth, has enabled the spatio-temporal description of hydrology. To do this, a series of monthly measurements (in-situ) for spatial coverage of 25 stations was tested. Long before that, the climatic and hydroclimatic parameters were obtained respectively at SODEXAM, the meteorological site earth.nullschool.net and ONADE. This study brought together the dynamics of the ITCZ and the hydrological system of the lagoon.
文摘The present contribution aims at helping the Mayors to implement a less expensive and effective system of management of household refuse to Yopougon. Indeed, the incapacity of service providers to be assured the collection of the garbage and the failure of their systems of pre-collection favored the emergence of the informal private precollectors in the municipality of Yopougon. The regularity of the interventions of these new actors, the affordable cost of their services and the living environment daily freed the garbage incites the households to request them because they succeed better where service providers failed. Such an activity will have to be better organized because of supplier employment.
文摘The purpose of this study is to assess the state of contamination of fish in the S? River by trace metal elements including Zinc, Lead, Cadmium, Copper and Arsenic. Water samples and four species of both sexes (Clarias anguillaris, Kribia kribensis, Tilapia guineensis and Eleotris vittata) were collected and analyzed. The pH, temperature and values of the chemical species present in the water of the S? River characterize an ecosystem favorable to the growth of aquatic species. The Metallic Traces Elements (MTE) concentrations vary from one fish species to another and depend on the sex and age of the animal. Zinc and copper are more concentrated in males than females with the exception of copper in Tilapia. The Pb concentration is higher in young Kribia and Clarias as well as Zn and Cd in young Tilapia. The concentrations in Cd and Pb are well above the European standards and those in the Republic of Benin, worrying results that express a health toxicity risk related to the consumption of fish of the river S?.
