The study was carried-out over a six months period. Seventy-two adult of Clarias gariepinus, thir... more The study was carried-out over a six months period. Seventy-two adult of Clarias gariepinus, thirty-six water and sediments samples were collected throughout. Lead was not detected in the muscles through-out the study. The accumulation of Cr and Ni in Clarias gariepinus muscles came mainly from sediments, Cu from both sediments and water, Fe mainly from sediments and slightly from water and Zn slightly from both sediment and water as shown by the different relationship between metals in muscles and the abiotic factors (water and sediments). Fish muscles were slightly polluted with Cr, Fe, Ni and Mn, while the water shows slightly polluted with Mn, Cd and Ni, and sediments shows slightly polluted with Cr, Cd, Ni and Fe, making it unsafe. It is important for regulatory agencies to monitor and enforce policies against some careless activities in the River, and also to fund more environmental related studies in this area.
S Studies on the abundance and diversity of plankton (phytoplankton and zooplankton) in Great Kwa... more S Studies on the abundance and diversity of plankton (phytoplankton and zooplankton) in Great Kwa River, South Eastern Nigeria, was undertaken biweekly for 3 months from July to September 2013. Samples were collected from two stations based on human activities at these stations. The Objective of the study was to determine the abundance and Distribution of various planktonic groups across the sampling stations. Samples were collected using the pour through method. A total of 26 species and 574 phytoplankton individuals belonging to 4 families were observed during the study. The families represented were Bacillariophyceae 49.83%, Chlorophyceae 21.25%, Chrysophyceae 16.55 and Cyanophyceae 12.37. A total of 23 species and 344 Zooplankton individuals belonging to 5 taxonomic groups were also identified during the study. The groups represented were Rotifera 28.49%, Arthropoda 24.71%, Palaemonidae 16.86%, Ciliophora 15.12% and Annelida 14.82%. This study showed diversity in plankton distri...
The relationship between bacteria and chlorophyll a was investigated for three months from July t... more The relationship between bacteria and chlorophyll a was investigated for three months from July to September, 2008 during flood and ebb tide periods at two sites in the Cross River basin, southeastern Nigeria, to ascertain the reliance of bacteria on autochthonous organic matter. There was no significant difference between flood water and ebb water samples at both stations for the entire variable measured. Bacterial cell abundance showed a weak positive correlation with chlorophyll a concentration at Station 1 (r* = 0.132, P > 0.05) and a strong positive correlation at Station 2 (r* = 0.599, P > 0.5). The micronutrients at both stations showed a weak negative correlation with chlorophyll a concentration. Linear regression analysis together with standardized coefficient value revealed a high bacteria/chlorophyll a relationship at Station 2 and a weak bacteria/chlorophyll a relationship at Station 1. Principal Component Analysis was applied to the measured variable, and a high c...
Background. Environmental contamination by lead (Pb) and other toxic metals is of significant env... more Background. Environmental contamination by lead (Pb) and other toxic metals is of significant environmental and human health concern. Heavy metals are not readily eliminated by degradation, and thus remediation of contaminated media (soil, sediment and water/sludge) requires the outright removal or cleanup of these metals. Evaluation of the performance and cost efficiency of various remediation methods has led to the development of bioremediation as an inexpensive, innovative and environmentally friendly cleanup strategy. Objectives. The present study was designed to assess the Pb remediation potential of wild Senna obtusifolia (Sicklepod), in Dareta Village, Zamfara, Nigeria. Methods. Soil and Senna obtusifolia samples were collected from established plots and Pb content was determined using a Shimadzu atomic absorption spectrophotometer (model AA-6800, Japan) after wet digestion. Results. The mean concentrations of Pb (mg/kg) in soil, roots, stems and leaves, respectively, were 13...
The study was carried-out over a six months period. Seventy-two adult of Clarias gariepinus, thir... more The study was carried-out over a six months period. Seventy-two adult of Clarias gariepinus, thirty-six water and sediments samples were collected throughout. Lead was not detected in the muscles through-out the study. The accumulation of Cr and Ni in Clarias gariepinus muscles came mainly from sediments, Cu from both sediments and water, Fe mainly from sediments and slightly from water and Zn slightly from both sediment and water as shown by the different relationship between metals in muscles and the abiotic factors (water and sediments). Fish muscles were slightly polluted with Cr, Fe, Ni and Mn, while the water shows slightly polluted with Mn, Cd and Ni, and sediments shows slightly polluted with Cr, Cd, Ni and Fe, making it unsafe. It is important for regulatory agencies to monitor and enforce policies against some careless activities in the River, and also to fund more environmental related studies in this area.
S Studies on the abundance and diversity of plankton (phytoplankton and zooplankton) in Great Kwa... more S Studies on the abundance and diversity of plankton (phytoplankton and zooplankton) in Great Kwa River, South Eastern Nigeria, was undertaken biweekly for 3 months from July to September 2013. Samples were collected from two stations based on human activities at these stations. The Objective of the study was to determine the abundance and Distribution of various planktonic groups across the sampling stations. Samples were collected using the pour through method. A total of 26 species and 574 phytoplankton individuals belonging to 4 families were observed during the study. The families represented were Bacillariophyceae 49.83%, Chlorophyceae 21.25%, Chrysophyceae 16.55 and Cyanophyceae 12.37. A total of 23 species and 344 Zooplankton individuals belonging to 5 taxonomic groups were also identified during the study. The groups represented were Rotifera 28.49%, Arthropoda 24.71%, Palaemonidae 16.86%, Ciliophora 15.12% and Annelida 14.82%. This study showed diversity in plankton distri...
The relationship between bacteria and chlorophyll a was investigated for three months from July t... more The relationship between bacteria and chlorophyll a was investigated for three months from July to September, 2008 during flood and ebb tide periods at two sites in the Cross River basin, southeastern Nigeria, to ascertain the reliance of bacteria on autochthonous organic matter. There was no significant difference between flood water and ebb water samples at both stations for the entire variable measured. Bacterial cell abundance showed a weak positive correlation with chlorophyll a concentration at Station 1 (r* = 0.132, P > 0.05) and a strong positive correlation at Station 2 (r* = 0.599, P > 0.5). The micronutrients at both stations showed a weak negative correlation with chlorophyll a concentration. Linear regression analysis together with standardized coefficient value revealed a high bacteria/chlorophyll a relationship at Station 2 and a weak bacteria/chlorophyll a relationship at Station 1. Principal Component Analysis was applied to the measured variable, and a high c...
Background. Environmental contamination by lead (Pb) and other toxic metals is of significant env... more Background. Environmental contamination by lead (Pb) and other toxic metals is of significant environmental and human health concern. Heavy metals are not readily eliminated by degradation, and thus remediation of contaminated media (soil, sediment and water/sludge) requires the outright removal or cleanup of these metals. Evaluation of the performance and cost efficiency of various remediation methods has led to the development of bioremediation as an inexpensive, innovative and environmentally friendly cleanup strategy. Objectives. The present study was designed to assess the Pb remediation potential of wild Senna obtusifolia (Sicklepod), in Dareta Village, Zamfara, Nigeria. Methods. Soil and Senna obtusifolia samples were collected from established plots and Pb content was determined using a Shimadzu atomic absorption spectrophotometer (model AA-6800, Japan) after wet digestion. Results. The mean concentrations of Pb (mg/kg) in soil, roots, stems and leaves, respectively, were 13...
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