Influence of intercrops on pests’ populations in upland rice (Oriza sativa L.)
December 2008
We conducted a 3 x 4 factorial experiment fitted into a randomized complete block design, using three intercrops: cowpea (Vigna unguiculata L. Walp) at 0, 50,000, 100,000, 150,000 plants/ha; groundnut (Arachis hypogea L.) at 100,000, 200,000, 300,000 plants/ha; and egusi-melon (Colocynthis vulgaris L.) at 10,000, 20,000, and 30,000 plants/ha to evaluate their influence on incidence...
Changing the Malaria Environment
November 2008
Heavy metals pollution profiles in streams serving the Owabi reservoir
November 2008
Water samples from five sampling points on four rivers, Owabi, Akyeampomene, Pumpunase and Sukobri, representing the main streams serving the Owabi reservoir were analysed for some pollution indicators using standard methods. Heavy metals (Zn, Cu, Mn, Cu, Pb and As) concentrations and some physical parameters of the water samples were determined. Electrical conductivity and pH of...
Metal tolerant species distribution and richness in and around the metal based industries: Possible candidates for phytoremediation
November 2008
Plant species growing in and around 38 metal welding workshops in Benin City, Nigeria, were surveyed. Eragrostis tenella occurred most frequently in all the sites, followed by Amaranthus spinosus, Eleusine indica, while Cucurbita pepooccurred least. The family Poaceae, was identified in all the sites visited. The frequency of occurrence of any particular plant species was used as an...
Parasitism of host trees by the Loranthaceae in the region of Douala (Cameroon)
November 2008
The Loranthaceae constitute the most important parasite plants that cause variable damages: morphological, technological, ecological and socio-economic. These numerous and damaging effects make some parasitic angiosperms true agronomic threats, especially in developing countries. The Loranthaceae is represented in Cameroon by 26 species gathered into 7 genus. The study area includes four...
Water supply, sanitation and health risks in Yaounde, Cameroon
November 2008
Population growth and rapid urbanization in Cameroon have led to major demographic changes in the urban centres, potentially resulting in serious environmental problems in the most populated cities such as Yaounde. In order to better understand the impacts on the hygiene conditions in certain quarters of this political capital, we carried out in March 2007, an investigation on the difficulties of water...
Mineralogical and geochemical study of mud volcanoes in north Moroccan atlantic margin
November 2008
The gulf of Cadiz is one of the most interesting areas to study mud volcanoes and structures related to cold fluid seeps since their discovery in 1999. In this study, we present results from gravity cores collected from Ginsburg and Meknes mud volcanoes and from circular structure located in the gulf of Cadiz (North Atlantic Moroccan margin) during the cruise TTR14 in 2004 on board of the R/V Logachev. The...
Distribution of nitrate in the water resources of Pakistan
November 2008
Water quality monitoring activities have recognized the nitrate contamination in the drinking water sources as one of the major quality issue of Pakistan. Adopting a uniform sampling design, 747 samples were collected from a wide range of irrigated or non-irrigated regions having distribution of samples in sixteen cities as Lahore (79), Kasur (46), Faisalabad (30), Khushab (50), Chakwal (51), Mianwali (30),...
Comparison of parasitic helminth infection between the different age groups of Clarias gariepinus from Asa dam Ilorin, north-central Nigeria
November 2008
A total of 160 specimens of Clarias gariepinus comprising three age groups – juveniles (standard length 10.0 – 29.9 cm), sub-adults (fish length 30.0 – 39.9 cm) and adults (fish length 40.0 – 59.9 cm) were collected over a period of 8 months from Asa dam, a major river in Ilorin. The fish length and weight ranged from 12.5 to 41.0 cm and 152 to 597 g respectively. They were...
The “Eye†of Africa: A Vision of Lake Victoria Basin as an Environmental Observatory
October 2008
Livelihood diversification and implications on poverty and environment in the Lake Victoria Basin
October 2008
This paper on livelihood diversification is based on an ongoing study under VicRes programme being undertaken in the Lake Victoria Basin, in Tanzania, Kenya and Uganda. We examine how changing socio-economic and environmental conditions contribute to livelihood diversification, land-use changes, poverty reduction strategies and environmental conservation in the Lake Victoria Basin. The study was undertaken...
Consumption, indigeneous knowledge and cultural values of the lakefly species within the Lake Victoria region
October 2008
Of the edible insects, lakeflies (Chaoborus and Chironomus sp) are least documented as items of human consumption. They are eaten by the Luo communities living within the Lake Victoria basin. The purpose of this study was to evaluate the importance of lake flies as a source of food and its role in cultural practices. Edible Diptera species were identified, indigenous knowledge...
Integrating wildlife in natural resources management for tourism and community livelihoods in Lake Victoria basin: East Africa
October 2008
As human settlement continues to expand to the edges of protected areas, administrators and politicians are now questioning the value of protected areas vis-à-vis human settlement. This demands for integrated planning and management of wildlife and other natural resources therein, to ensure that they sustain tourism and community livelihoods. Improving rural livelihoods through integrating wildlife...
Comparative analysis of production practices and utilization of pumpkins (Cucurbita pepo and Cucurbita maxima) by smallholder farmers in the Lake Victoria Basin, East Africa
October 2008
Study was carried out in 2007 in four districts of Lake Victoria Basin: Busia, Gucha, Tarime and Jinja. Rapid participatory appraisal approaches were used to assess the socio-economic, cultural, gender and environmental aspects related to cultivation, storage and utilization of pumpkins by the native communities living in the four selected districts. It was observed that majority of the farmers in the Lake...
Socioeconomic constraints to sustainable cocoyam production in the Lake Victoria Crescent
October 2008
Cocoyam production has the potential of significantly improving the food security status and income levels of farmers in the Lake Victoria region. The study covered various areas of the three East African states, Kenya, Uganda and Tanzania as follows: Kisumu, Kakamega and Siaya districts in Kenya; Bukoba in Tanzania; and Mukono, Wakiso and Kampala in Uganda. Structured questionnaires were used to collect data...
Effects of land use practices on livelihoods in the transboundary sub-catchments of the Lake Victoria Basin
October 2008
The Lake Victoria Basin (LVB) is experiencing changes in land use due to both anthropogenic and natural drivers which are critical to the sustainability of the resources and livelihoods of the communities. Indeed the resultant land use practices and decisions made by the communities on the use of the land rely on the changes in the basin. This paper presents an analysis of the land use practices in the Lake...
Recycling of wastes as a strategy for environmental conservation in the Lake Victoria Basin: The case of women groups in Kisumu, Kenya
October 2008
This paper examines the roles, opportunities and challenges that women groups in Kisumu City face as they recycle polythene papers and water hyacinth plant materials to make various saleable products such as bags, mats and baskets. The study objectives were: To analyze the roles of women groups in environmental conservation; To examine the opportunities that the women groups had in the recycling of polythene...
Sustainable wetland resource utilization of Sango Bay through Eco-tourism development
October 2008
Defining and achieving sustainable development is a major issue for policy debates both in the developed and developing countries. Eco-tourism as an important niche market in the world tourism industry has been embraced by developing countries like Uganda, which are trying to use tourism as an engine of national development. It embraces environmental conservation, maintenance of biodiversity, a satisfying...
Does African catfish (Clarias gariepinus) affect rice in integrated rice-fish culture in Lake Victoria Basin, Kenya?
October 2008
An experiment was conducted for 98 days in the Lake Victoria Basin to investigate the interactions of fish and rice growth performance in rice paddies. The experiment was laid out in a split-plot design, with rice cultivar as the main plot and method of rice-fish culture as the sub-plot. Treatments consisted of two levels of rice-fish culture and three cultivars of rice. Rice cultivars used were; ITA,...
Indigenous knowledge of field insect pests and their management around lake Victoria basin in Uganda
October 2008
Food security and poverty alleviation has remained the primary agenda in the Eastern Africa regional food policies, and Uganda is no exception. Field pests that attack crops are among the greatest threat to increased food production. The subsistence farmers in the Lake Victoria Basin (LVB) rarely use synthetic pesticides in the field due to the high cost and availability issues. Therefore, some rely on the...
Environmental lead pollution and contamination in food around Lake Victoria, Kisumu, Kenya
October 2008
Exposure to lead (Pb) through food, water, or contaminated air has adverse health impacts that are particularly severe in children. Many countries have outlawed the use of leaded petrol, and enacted policies and regulations limiting lead pollution, and lead levels in foods. However, African countries, including Kenya, have generally been slow in adopting policies and regulatory structures concerning...
Environmental Education and Research in Africa
September 2008
Adaptation technologies and legal instruments to address climate change impacts to coastal and marine resources in Tanzania
September 2008
The increase in greenhouse gases in the atmosphere and the consequent pressures related to climate change are having significant impacts on the coastal and marine resources on which much of Tanzania’s coastal population depends for its livelihood. A decline in mangrove cover, coral bleaching and mortality and the destruction of seagrass beds are some of these impacts. Coastal erosion also poses threats...
Remediation of anthracene in mycorrhizospheric soil using ryegrass
September 2008
Rhizosphere bioremediation has become an effective technique that uses green plants to enhance biodegradation of persistent organic pollutants such as polycyclic aromatic hydrocarbons (PAHs), pesticides and radionuclides. Polycyclic aromatic hydrocarbons, due to their hydrophobic nature were found to be retained in the soil. Plants could be grown at the PAH contaminated sites to stimulate the biodegradation...
Effect of electroplating industrial waste on “available phosphorus†of soil in relation to other physico-chemical properties
September 2008
Unorganized land disposal of industrial wastes contaminates land and ground water. The Wazirpur Industrial area of Delhi, a metropolitan city, generates highly acidic (pH 2 - 3.8) and toxic waste, and disposal remains a perpetual problem. This waste contains a high quantity of macronutrients as well as heavy metals because major industries are involved in metals finishing. Wastes of these industries were...
Occurrence of elevated nitrate in groundwaters of Krishna delta, India
September 2008
Nitrate concentrations were measured in the groundwater samples of Krishna delta, India. The results indicate a large variation of nitrate from 10 - 135 mg/l. In 79 groundwater samples, about 39% shows high nitrate contents (>50 mg/l), which is more than the permissible limits in drinking water. In north Krishna delta 49% and in south Krishna delta 26% water samples were found to exceed the permissible...
Environmental aesthetics and athletics
August 2008
Microbiological characteristics of waters in the major rivers in Kainji Lake National Park
August 2008
This research work determined the microbiological characteristics of the waters of rivers of Kainji Lake National Park. The implications on public health and aquatic life were also examined. The rivers include: Oli, Manyera, Poto and Nuwanzurugi. Samples were taken twice a year, that is, dry and wet seasons of each year. Standard methods were used for bacteriological examination plating. The results...
Assessment of contamination of singed hides from cattle and goats by heavy metals in Ghana
August 2008
Many local butchers in Ghana have been using scrap tyres as substitute for firewood to singe slaughtered ruminants. This study analysed such singed hides from seven goats and three cattle in unregulated local slaughtering operations near the Kumasi abattoir, for risk of heavy metal contamination (Mg, Mn, Cu, Ni, Cd, Pb and Zn) using atomic absorption spectrometry. Relative to un-singed control hides, singed...
Range use and dynamics in the agropastoral system of southeastern Kenya
August 2008
Occurrence of equilibrium and non equilibrium system dynamics in semiarid environments present serious management challenges. In these areas, resource management strategies are increasingly based on equilibrium rather than non equilibrium dynamics that assume simple system dynamics and strong coupling of animal-plant responses. This management approach underlies increasing trends of range degradation and low...
Survey of the physico-chemical quality of the wastewaters of Biskra city rejected in Chabat Roba, Messdour and Wadi Z'ommor (Algeria)
August 2008
The wastewaters of the agglomeration of Biskra (Southeast Algeria) are poured without treatment in three main dismissals that are Chabat Roba (1st site), Messdour (2nd site) and Wadi Z'ommor (3rd site). The pollution charge determined in the 1st site is the order of 157.76 ± 34.14 mg/L of O2 for the BOD5(Biochemical Oxygen Demand in 5 days) of 457 ± 73.59 mg/L of...
Chemical carcinogenesis and chemoprevention: Scientific priority area in rapidly industrializing developing countries
July 2008
Occupational cancers are now a serious concern in industrializing developing countries where exposure levels to hazardous chemicals considerably exceed regulatory limits established in industrialized countries. The association between increasing use of chemicals and associated disorders and chemoprevention or anticarcinogenesis is insufficiently recognized in these countries. The eradication of chemicals...
Diversity and distribution of medicinal plants in North Sinai, Egypt
July 2008
The present study aims to assess plant diversity and distribution of medicinal plants in relation to environmental factors at three geomorphological districts (Mediterranean coast, anticlines, and inland) and five main habitats (salt marshes, sand dunes, sand plains, wadis, and gorges) in North Sinai. The results revealed that North Sinai harbors 281 species with high taxonomic diversity (species/genera =...
Diversity in soil seed bank of Sinai and implications for conservation and restoration
July 2008
Understanding the diversity level of seed bank is important for designing conservation and restoration programs especially in arid ecosystems. A diverse of diversity indices has been used in evaluating seed communities regardless of its suitability to measure the ecological quality of the targeted biological community. The current study aims to evaluate the spatial variability in the seed bank of Sinai...
Water quality parameters in the major rivers of Kainji Lake National Park, Nigeria
July 2008
This study examined the physical and chemical properties of waters of the major rivers in Kainji Lake National Park for a period of twenty four months. The implications on the public health and aquatic organisms were also determined. The major rivers include; Oli, Manyera, Nuwanzurugi, and Poto. River Oli was sampled at the hippo pools at Kilometers 8 and 12 and two animal drinking points. Other rivers were...
Fitness and its variation among populations of Acacia tortilis subsp. raddiana in Southern Sinai, Egypt
July 2008
Acacia tortilis subsp. raddiana (Fabaceae) plays an important role in the life of desert animals and is a major source of livestock feed and firewood for the native Bedouin people in Southern Sinai, Egypt. High mortality and low juvenile recruitment has been reported in recent years leading to decline in population size and number of this species. Small populations tend to be subject to an...
Homo periculosus var. infestus
June 2008
Influence of varying light regimes on photosynthesis and related variables on tree seedlings of Warburgia ugandensis Sprague and Polyscias fulva (Hiern) harms
June 2008
The physiology of seedlings of Warburgia ugandensis and Polyscias fulva were studied at varying light levels. Photosynthesis was significantly higher in P. fulva(1.4 mmols CO2 m-2 s-1) than in W. ugandensis (0.3 mmols CO2 m-2s-1) when grown in full sunlight. However, photosynthesis was not significantly (P > 0.05) different under moderate and...
The current pollution status of the new Calabar river in the Niger Delta region of Southern Nigeria: A survey of antibiogram profiles of its bacterial isolates
June 2008
The incidence of environmental pollutants on bacterial strains isolated from the New Calabar River in the Niger Delta region of Southern Nigeria were investigated in order to ascertain the possible effects on antibiotic resistance and patterns. The physico-chemical parameters of the water samples assayed included temperature, pH, biochemical oxygen demand, chemical oxygen demand, dissolved oxygen, salinity,...
Soil carbon and nutrient accumulation under forest plantations in southern Rwanda
June 2008
Tree and soil interactions may result in changes in soil carbon and nutrient contents. Forest plantations made up of monodominant stands of 17 different species, some native and some exotic to Rwanda, as well as a stand with mixed native tree species were investigated. Biosequential sampling was used followed by basic soil chemical analyses. Results revealed that the plantation species composition influenced...
Seasonal variations in heavy metal concentrations in soil and some selected crops at a landfill in Nigeria
May 2008
In this study, the seasonal variations in concentrations of the heavy metals - As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn - in soil and crops from a farm near the refuse dump site of Obafemi Awolowo University, Ile-Ife, Nigeria were investigated during the two major seasons of Nigeria. This was done to assess the pollution status of the farm and hence the safety levels of the crops produced. Soil and crop...
Local institutions for sustaining wetland resources and community livelihoods in the Lake Victoria basin
May 2008
What should policy makers do in deciding between institutions promoting community livelihoods or sustaining wetland resources within an impoverished community? Prioritizing community livelihoods without understanding the impact of local institutions on wetland resources may only aggravate impoverishment. However, prioritizing sustainable wetland resource use may lead to short-term impoverishment with...
Changes in soil properties and plant uptake of heavy metals on selected municipal solid waste dump sites in Ile-Ife, Nigeria
May 2008
In a study to evaluate the contributions of open municipal waste dump to soil heavy metals contamination and the modification of other soil physical and chemical parameters, soil samples were collected at various depths from the vicinity of major dump sites in Ile-Ife (latitudes 7°27΄and 7°32΄, longitudes 4° 22' and 4° 29'), Nigeria. The samples when analyzed, showed...
Urban effluent pollution from the Mghogha flow of the west, margin of the Mediterranean sea, Morocco
May 2008
Tangiers bay, located in the extreme west of the Mediterranean Sea, and in the north west of Morocco, receives various pollutants through the Mghogha canal from urban and industrial rejections of Tangiers city. This survey was focused on physicochemical and geochemical characterization of the more exposed sites situated on Mghogha canal and on the bay coastline. Physicochemical analysis (Temperature (21 -...
Pathogenic diversity of Sclerotium rolfsii isolates, a potential biocontrol agent against Parthenium hysterophorus L.
May 2008
Parthenium hysterophorus L. is a wide-spread weed creating problems for agriculture and public health. Microbes and their by products is now proved to be a worthy alternative to toxic chemicals used for weed management. We determined the relative pathogenicity of ten Sclerotium rolfsii isolates recovered from diseased parts of Parthenium collected during a survey of various habitats...
Anthophilia and the Quality of Life
April 2008
Temporal variations in the abundance of heterotrophic bacteria in ground water according to land use patterns in Mysore district, India
April 2008
Temporal variations in the abundance of heterotrophic bacteria were studied from February 2005 to January 2007, in ground waters from Agricultural, Domestic and Industrial land use areas. The lowest mean abundance (AODG ml-1) of Free Living Bacteria (2.2 × 105), Particle Bound Bacteria (0.07 ×105) and Total Bacteria (2.28 ×105) was recorded in ground water of Agricultural area;...
Predicting chromium (VI) adsorption rate in the treatment of liquid-phase oil-based drill cuttings
April 2008
The adsorption rate of chromium (VI) on commercial activated carbon during the treatment of the flocculation effluent of liquid-phase oil-based drill-cuttings has been investigated in terms of contact time and initial chromium (VI) ion concentration. Homogenizing 1 g of the activated carbon with 100 ml of the flocculation effluent of known initial concentrations (1.25 → 6.25 mg/l, in turn) in a flask, at...
Page 22 of 23, showing 50 records out of 1126 total, starting on record 1051, ending on 1100
Advertisement
Advertisement
