Department of Environmental Management & Toxicology

Permanent URI for this collection

https://repository.run.edu.ng/handle/123456789/4551

Browse

Now showing 1 - 16 of 16

Air Pollutant concentration and comfort index in commercial buses within Abeokuta Metropolis, South-Western Nigeria
(International Journal of Environmental Quality, 2024-08-20) Tijani Yemisi Aramide
This study assessed the level of air pollutants and comfort index in public buses from selected parks in Abeokuta metropolis. Sixty commercial buses were randomly selected across the four major motor parks in the city for the monitoring of comfort index (temperature and relative humidity) and air pollutants (carbon monoxide, volatile organic compounds and particulate matter) within one month using low-cost hand-held portable meters. The average temperature and relative humidity ranged between 35.6 – 36.0°C and 57.9 – 62.4% respectively. The average concentrations of in-vehicle air pollutants ranged from 29.8 – 32.7 mg/m3 (CO), 58.3 – 76.3 µg/m3 (VOCs), 25.3 – 44.2 µg/m3 (PM2.5) and 108.3 –117.4 (PM10). Significant spatial variations among in-vehicle RH and VOCs were observed across the sampling locations. The Air quality index of air pollutants within the vehicles was rated hazardous (CO), unhealthy (PM2.5) and moderate (PM10) across the motor parks. The passengers and drivers exposed to this poor air quality could be at risk of breathing discomfort and other respiratory illnesses, hence the need for specific measures to reduce the air pollutant concentrations within the buses.
Ambient Levels of Gaseous, Particulate and Bio-aerosol Pollutants in Farm Settlements across Ogun State, Southwest Nigeria
(Journal of Agricultural Science and Environment, 2019-10) Tijani Yemisi Aramide
This study assessed the levels of air pollutants emitted outdoor of farm settlements (FS), the seasonal and temporal variations, and the relationship among the parameters monitored. Seven FS within Ogun State were investigated, with 211 sampling points established across the FS. The concentrations of VOCs, SO2, NO2, CO, O3, NH3, CO2, TSP, PM2.5 and PM10 were monitored in replicates using active potable samplers while bacteria and fungi were isolated using settle plate technique. Descriptive (means and standard deviation) and inferential statistical tools (Pearson correlation) were used to analyse the data. The mean ranges of VOCs, CO and CO2 (ppm); 20.8±10.53 – 48.67±19.05, 17.95±6.65 – 21.5±3.93, 3562.15±1200.85 – 4266±1176.85, and for bacteria and fungi (cfu/m3 ); 548.98±1.18 – 2255.01±1.27 and 525.68±1.15 – 1282.38±1.27 respectively were above the threshold limits. There were significant seasonal, spatial and temporal differences among observed means of VOCs, CO2 O3, TSP, PM2.5, and fungi. The bacteria and fungi count increased as TSP, PM2.5 and PM10 increased. The study established that levels of air pollutants are dependent on the type of farming practice.
Assessment of Noise Levels and Health-Related Problems in Selected Hospitals in Abeokuta, Nigeria
(African Journal of Health Safety and Environment, 2023-06-28) Tijani Yemisi Aramide
Exposure to high noise levels in the hospital reportedly has negative effects on patients' health and reduces the productivity of the workers. This study assessed the noise levels in the various activity areas in some hospitals and their associated health effects in Abeokuta. The noise levels were measured using a digital sound level meter (Smart sensor DSLM). A descriptive cross-sectional survey was also conducted to examine the perception, effects, awareness and mitigation measures of noise among the hospital staff and patients. The observed mean noise levels in decibels (dB) throughout the activity areas in the hospitals ranged from 61.1-76.9dB (FMC), 62.0-74.3dB (SH), 63.4-71.4dB (SHH), 66.0-81.5dB (HC), and 59.0-66.7dB (KPH). The noise level was higher in the outpatient department and exceeded the WHO-recommended average noise levels in hospitals. Annoyance, distraction and stress were the most commonly reported noise effects among staff and patients in all hospitals. There was low awareness of noise effects and poor knowledge of mitigation measures for noise pollution among the respondents. Implementation of training to promote awareness of noise, enforcement and compliance with existing policies on noise prevention and control in healthcare facilities are highly recommended.
Assessment of the Physico-chemical water quality of an Artificial Lake in Osun State, Nigeria, over time and space
(International Science Community Association, 2022-04) Omoboye, Helen Yetunde
This study investigated the variation in physico-chemical water quality of the Esa-Odo Reservoir over space and timefrom February 2017 to December 2018 at two months interval. To cover the whole reservoir zone, sampling points were chosen horizontally and vertically at marked out stations. Depth, transparency (using Secchi disc) and temperature (using mercuryin-glass bulb thermometer) were determined on field. Other physical and chemical parameters were evaluated using standard methods. The values obtainedrevealed Esa-Odo Reservoir as slightly buffered freshwater with cationic hierarchy of Na >Ca > Mg > K and anion hierarchy of HCO3-> Cl->SO42-. Investigated physical parameters varied the most and were significant for two parameters (True Color and Total suspended solid) spatially. While vertically highly significant variation were observed for four (Temperature, Turbidity, Total suspended solid, apparent and true color) parameters. Seasonally, five of the investigated physical parameters (Turbidity, Total solid, Total suspended solid, apparent and true color) showed very highly significant variation. However, in terms of the chemical parameters investigated, only the salinity parameters showed significant vertical (pH and TDS) and highly significant seasonal (TDS, Alkalinity and Hardness) variations. Moreover, seasonally, the nutrient parameters recorded highly significant variation as well as all ions assessed except potassium. All monitored physico-chemical parameters were within the guide level range as of the World Health Organisation (WHO) for drinking water, therefore Esa odo Reservoir water can be classified as fairly clean, alkaline freshwater. However based on the significant seasonal variations in its water quality, regular proper monitoring of the reservoir is recommended.
Indoor Air Quality of Beauty Salons in Commercial and Residential Areas of Camp, Abeokuta, Ogun State, Nigeria
(Journal of Applied Science Environmental Management, 2023-02) Tijani Yemisi Aramide
Growing increase of beauty salons and exposure to associated chemical substances present serious concern of chemical hazards and health problems. This study assessed indoor air quality (IAQ) of selected beauty salons in commercial and residential areas of Camp settlement in Abeokuta, Ogun State, Nigeria using Aeroqual GasSensing Monitor and WindMate® Weather Station. Human thermal sensation (HTS) was computed using Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied (PPD) Indices. Data collected were subjected to descriptive and inferential statistics. Findings showed TVOC exceeded permissible exposure limit (0.2 mg/m3 ) in all salons and critical safe level (2500 ppm) for CO2 was exceeded in one-third. Exceedance was observed in less than one-third of salons for P.M2.5 and P.M10, due to varying activities taking place per time, and location differences. Where detected, H2S was below permissible limit (1.4 mg/m3 ). HTS was above the acceptable thermal comfort levels (PMV: ±0.5; PPD: <10%) in all salons. Generally, the IAQ indicates prevalence of inadequate ventilation, and portends increased exposure risk to hazardous chemical substances associated with salon activities. Therefore, formulation of policy, stipulating minimum operating standards and enforcement, alongside enlightenment campaign are necessary to promote human safety and prevent escalation of chemical related hazards in salons.
JournalPhysicochemical Characteristics of Hand-dug Well Water Conditions and Hygiene Practices among Households in Selected Areas of Ado-Odo/Ota, Ogun state, Nigeria
(Journal of Applied Science Environmental Management, 2025-02-28) Tijani Yemisi Aramide
Water resources characterization is an essential component of quality water deliveries to the populace. Hence, the objective of this paper was to assess the physicochemical characteristics of hand-dug well water conditions and hygiene practices among households in selected areas of Ado-Odo/Ota, Ogun State, Nigeria using appropriate standard methods. Data obtained showed that the mean pH concentrations ranged from 2.2 – 7.26; temperature 27.2 – 35.5°C; TDS 46.33 – 442 mg/L and EC 21.67 – 128.33 μS/cm, respectively. Significant variations (p<0.05) were observed in the water concentrations sampled across the study area. About 70% of the wells are of medium risk and 56% of the well owners indicated that their well water suffers a colour change, especially during the wet season and 58% reported typhoid as illness suffered most in the last six months. We observed housefly infestation and human excreta odour, including unhygienic activities around the well heads which mostly have cracked casings. Well owners displayed low knowledge about their well water quality and well sinking standards. The study concluded that, wells in the area may be exposed to faeco-oral disease pathogens.
Macro-invertebrates as Indicator of Water Quality of Egbe Reservoir, Egbe-Ekiti, Nigeria
(Nature and Science, 2016) Omoboye, Helen Yetunde
The study of macro-invertebrate fauna and physico-chemical parameters of Egbe-Reservoir was conducted from May – July, 2009. Physico-chemical parameters of the water samples were determined using standard methods. Sampling of macro-invertebrates was done by Kick sampling method and the macro-invertebrates found were identified under light microscope using low power (10X) and scanning power (40X) magnifications. The Macro-invertebrates obtained from the reservoir composed; Melanoids tuberculata which has 53.3% by number of total macro-invertebrates, Biophalaria pfeifferi 6.7%, Lymnae natalensis 22.5%, Hirudinea 13.3%, oligochaetae with 2.5% and Odonata with 1.7% by number of total macro-invertebrates. The result showed variation in the physico-chemical parameters at different sampling stations in the reservoir. The physico-chemical parameters determined during the period of study fall within optimal limit for productive freshwater. Statistical analysis of the result showed that there were significant correlations (p≤0.05, r=0.555) between Biochemical Oxygen Demand and Dissolved Oxygen. Also, there was an inverse significant correlation (p≤0.05, r=-0.536) between Earthworm and pH. Based on the result recorded during the period of study, Egbe Reservoir was found to be fairly unpolluted and should be subjected to regular monitoring It must however be well treated before consumption. The significant relationship between physico-chemical parameters and macro-invertebrates of the reservoir showed that physicchemical parameters influenced the distribution of macro-invertebrates of the reservoir
Microbial Nanoremediation of Microplastics: A review
(South aAfrican Journal of Chemistry, 2024-08-02) Akinhanmi, Fadekemi Olabisi
Microplastics’ ubiquity in all environmental matrices worldwide, coupled with poor plastic waste management practices, calls for serious health and environmental attention. Microplastics are persistent and slow-degrading contaminants with a high potential to fragment as well as adsorb other contaminants. Along with macroplastic waste reduction methods such as incineration, recycling, landfilling, pyrolysis, and bioremediation approaches novel methods to remove microplastics from the environment are necessary. The multidisciplinary and progressive area of science, nanotechnology, has the potential for diverse applications with engineered nanomaterials that have superior properties over micro-particles because of their size and surface area ratio. The integration of microbial remediation and nanotechnology holds great promise for the nano-remediation of persistent environmental microplastics. Here, we review plastic-degrading microbes (Bacillus sp., Diplococcus sp., Klebsiella sp., Moraxella sp., Streptococcus sp., Staphylococcus sp., Micrococcus, Pseudomonas, Aspergillus sp), microbial synthesis of nanoparticles (Zinc oxide, iron oxide, copper oxide, magnesium oxide, titanium oxide and others), and nanoparticle synthesis with plastic-degrading microbes. This article also discusses the mechanism of microbial nano-remediation and microbial interactions with nanomaterials. The advantages, limitations, and prospects of microbial nano-remediation of microplastics are discussed. This review suggests the use of metagenomics to further identify a wider range of organisms for bioremediation of microplastics, while also proposing the use of artificial intelligence for the construction of immobilized microbial nano-enzyme composites for degrading microplastics faster.
Physico-chemical analysis and identification of antibiotics resistant Enterobacteriaceae from groundwater sources in Ayobo, Lagos, Nigeria
(International Research Journal of Environmental Sciences, 2023-10) Omoboye, Helen Yetunde
This study aimed at evaluating the physico-chemical parameters and detection of Enterobacteriaceae of groundwater samples in Ayobo, Lagos State. The physico-chemical and bacteriological parameters were determined using standard methods. Twenty Groundwater samples were selectively collected over a period of 6 weeks from two groundwater stations which were Anchor University and Ayobo community. Groundwater temperature values from both well and borehole ranged from 23.9-27.5°C, with an average value of 24.9°C. Conductivity and TDS had their highest values (99.1μS and 49.3ppm) recorded in well 1 of station 1 while in station 2, the result of the selected physico-chemical water quality parameter revealed that the temperature of groundwater samples ranged from 25.1oC to 26.5oC. pH range from 5.0-7.0 with the highest value (7.0) recorded in sample BOK 1 and BOK 2. Conductivity recorded the highest value of 60.9μS while TDS had the highest value of 63.8ppm. Total mean counts for total viable count, faecal coliforms and total coliforms for Station 1 were as follow: 225.00±7.07CFU/ml, 167.00±4.25CFU/ml and 131per 100ml respectively; and for Station 2: 137.00±1.41CFU/ml, 102.00±1.41CFU/ml and 250 per 100ml respectively, which are all higher than the WHO standard limits. The result of the antibiotics susceptibility profiling revealed that the isolates were resistant to more than three antibiotics. In conclusion, this study showed that borehole water and well water around Ayobo are not safe for direct consumption due to high level of the quality indicator bacteria in them.
Prevalence of multidrug-resistant Campylobacter species in wastewater effluents: A menace of environmental and public health concern
(Helicobacter WILEY, 2024-05-08) OLUWAKOYA OLUFUNMILAYO
Abstract The prevalence of multidrug-resistant Campylobacter species in wastewater effluents presents a formidable challenge at the intersection of environmental sustainability and public health. This study examined the presence of multidrug-resistant Campylobacter in wastewater effluents in the Eastern Cape Province, South Africa, and its implications for environmental ecosystems and public health. Forty-five samples from household effluent (HHE) and wastewater treatment plant effluent (WWTPE) were collected at different geographical locations within the province between April and September 2022. The counts of the presumptive Campylobacter genus ranged from 5.2 × 103 to 6.03 × 104 CFU/mL for HHE and 4.93 × 103 to 1.04 × 104 CFU/mL for WWTPE. About 42.55% of the samples were positive for Campylobacter species. Five virulence determinants including the cadF and wlaN were detected in all the isolates; however, flgR (19.23%), ciaB, and ceuE (15.38%) were less prevalent. The antibiogram profiles of confirmed Campylobacter isolates revealed high resistance (>55%) against all tested antibiotics ranging from 55.77% (nalidixic acid) to 92.30% (erythromycin), and resistance against the other antibiotics followed the order ciprofloxacin (51.92%), azithromycin (50%), and levofloxacin (48.08%). On the contrary, gentamicin was sensitive against 61.54% of the isolates, followed by imipenem (57.69%) and streptomycin (51.92%). The WWTPE's antibiotic resistance index (ARI) was 0.19, lower than the permitted Krumperman threshold of 0.2; and HHE's ARIs were higher. The isolates' respective multiple antibiotic resistance indexes (MARI) varied between 0.08 and 1.00. Among the phenotypically resistant Campylobacter isolates examined, 21 resistance determinants encoding resistance against β-lactam, carbapenems, aminoglycosides, phenicol, quinolones, tetracyclines, and macrolides were detected, which explains the phenotypic resistance observed in the study. This study concludes that the wastewaters in the study areas are important reservoirs of multidrug-resistant and potentially pathogenic Campylobacter species, suggesting the need for proper treatment of the wastewaters to eliminate the organisms in the effluents before discharge the final effluent to the receiving watershed.
Primary Productivity of Owalla Reservoir, Osun State, Southwest, Nigeria
(New York Science Journal, 2017) Omoboye, Helen Yetunde
This study investigated primary productivity of Owalla Reservoir, Osun State, Nigeria. This was with a view to providing relevant information on the primary productivity of the reservoir. Sampling period covered rainy and dry seasons. Seven Sampling stations were selected on the reservoir for this study (designated 1, 2, 2 3, 4, 5, 6 and 7). At Stations 1 and 3, only surface water samples were collected for primary productivity while water samples were collected from three levels of water column (surface, mid-depth and close to the bottom) of the reservoir at other stations (Stations 2, 4, 5, 6, and 7). Primary productivity was determined using Oxygen Method. The data obtained were subjected to appropriate statistical analysis. The gross primary productivity of Owalla Reservoir during the study period ranged from 17.28 to 126.72 KCal/M3/day. The respiration of Owalla Reservoir during the study period ranged from 1.73 to 103.68 KCal/M3/day while the net primary productivity of Owalla Reservoir during the study period was in the range of 4.90 - 45.22 KCal/M3/day. Net productivity accounted for 34.7% of the Gross Productivity. Respiration accounted for 65.3% of the Gross Productivity. The mean value of the net productivity of the reservoir decreased vertically from surface to the bottom. The mean respiration decreased towards the dam site while the vertical variation generally showed decrease vertically from the surface level to the bottom of the reservoir (P≤0.05). Gross primary productivity decreased down the reservoir column from the surface to the bottom and there was very highly significant difference (P≤0.001) in mean value at the three vertical depths. The reservoir can be classified as oligotrophic based on its primary productivity level. However, the lake should be subjected to regular proper monitoring
Productivity of Owalla Reservoir, Osun State, Southwest, Nigeria
(New York Science Journal, 2017) Omoboye, Helen Yetunde
Abstract: This study investigated primary productivity of Owalla Reservoir, Osun State, Nigeria. This was with a view to providing relevant information on the primary productivity of the reservoir. Sampling period covered rainy and dry seasons. Seven Sampling stations were selected on the reservoir for this study (designated 1, 2, 2 3, 4, 5, 6 and 7). At Stations 1 and 3, only surface water samples were collected for primary productivity while water samples were collected from three levels of water column (surface, mid-depth and close to the bottom) of the reservoir at other stations (Stations 2, 4, 5, 6, and 7). Primary productivity was determined using Oxygen Method. The data obtained were subjected to appropriate statistical analysis. The gross primary productivity of Owalla Reservoir during the study period ranged from 17.28 to 126.72 KCal/M3/day. The respiration of Owalla Reservoir during the study period ranged from 1.73 to 103.68 KCal/M3/day while the net primary productivity of Owalla Reservoir during the study period was in the range of 4.90 - 45.22 KCal/M3/day. Net productivity accounted for 34.7% of the Gross Productivity. Respiration accounted for 65.3% of the Gross Productivity. The mean value of the net productivity of the reservoir decreased vertically from surface to the bottom. The mean respiration decreased towards the dam site while the vertical variation generally showed decrease vertically from the surface level to the bottom of the reservoir (P≤0.05). Gross primary productivity decreased down the reservoir column from the surface to the bottom and there was very highly significant difference (P≤0.001) in mean value at the three vertical depths. The reservoir can be classified as oligotrophic based on its primary productivity level. However, the lake should be subjected to regular proper monitoring.
Self-Reported Health Effects and Risk Factors Associated with Noise Exposure among Auto-Mechanic Workers in Abeokuta Town, Nigeria
(African Scientist Journal, 2023-03-31) Tijani Yemisi Aramide
This study was conducted to determine the noise exposure level and the association between self-reported health effects and risk factors among workers in auto mechanic workshops in Abeokuta town, Nigeria. Noise levels were measured at selected auto mechanic sites. A cross-sectional study was also conducted among fifty workers using a well structured questionnaire across the sampling sites. The recorded noise level in the morning and afternoon ranged between 61.3 - 75.8 dB and 70.4 and 86.4dB respectively. The noise values in the afternoon were significantly higher than the morning noise levels (t = -2.231; p = 0.030). The noise levels were above the WHO permissible limits in all the sampling locations. The overall occurrence of self-reported health effects were hearing loss (32%), annoyance (62%), irritation (72%), insomnia (16%), ringing in ears (44%), fatigue (44%), and high blood pressure (18%). The reported noise-induced health effects were associated with the age of the workers, duration of noise exposure and perceived noise sources in the study area. In the binomial regression model, exposure to occupational noise for 8 – 12 hours daily was an independent determinant risk factor of hearing loss (OR = 2.27, 95% Cl, 1.21-24.88) and fatigue (OR = 5.00, 95% Cl, 1.16-21.50). The implementation of correct wearing of earplugs among workers and the creation of awareness on noise-induced health effects to reduce noise exposure in the working environment would help in protecting exposed workers in the study area.
Spatial Analysis of Environmental Noise and Auditory Health of Abeokuta Residents, Ogun State, Nigeria
(Journal of Applied Science Environmental Management, 2019-09) Tijani Yemisi Aramide
This study assessed environmental noise levels, mapped the spatial pattern at different times of the day and examined the association with morbidity of auditory ailments in Abeokuta metropolis. The entire metropolis was divided into 80 cells (areas) of 1000 m2 ; out of which 33 were randomly selected for noise levels assessment. Portable noise meter (AR824) was used to measure noise level and Global Positioning System (Garmin GPS-72H) was employed to take the coordinates of the sample sites for mapping. Risk map of the noise levels were produced using Kriging interpolation techniques based on the spatial spread of measured noise values across the study area. Data on cases of hearing impairments were collected from four major hospitals in the city. Data collected from field measurements and medical records were subjected to descriptive (frequency and percentage) and inferential (Mean, ANOVA and correlation) statistics using SPSS (version 20.0). ArcMap 10.1 was employed for spatial analysis and mapping. Results showed mean noise levels range at morning (42.4±4.14 – 88.2±15.1 dBA), afternoon (45.0±6.72– 86.4±12.5 dBA) and evening (51.0±6.55–84.4±5.19 dBA) across the study area. The interpolated maps identified Kuto, Okelowo, Isale-Igbein and Sapon as high noise risk areas. The monitored noise levels varied significantly among the sampled areas at morning, afternoon and evening (p <0.05). Significant correlation was found between diagnosed cases of auditory ailments and noise levels measured in the morning (r=0.39 at p<0.05). Common auditory ailments found across the metropolis included impaired hearing (25.8%), tinnitus (16.4%) and otitis (15.0%) respectively
Water quality and planktonic community of Owalla Reservoir, Osun State, Southwest Nigeria
(Acta Limnologica Brasiliensia, 2022) Omoboye, Helen Yetunde
Aim: Owalla Reservoir, one of the largest and oldest man-made lakes in Osun State supplies potable water to many towns in the state including the state capital, Osogbo. Active fshing activities also takes place in the lake. Inspite of the importance of the reservoir, information on the planktonic community and physico-chemical water quality are scarce. Terefore, this study investigated the water quality and plankton composition of Owalla Reservoir, Osun State, Nigeria, from October 2012 to November 2013 with a view to providing baseline information on limnology of the reservoir. Methods: Seven sampling stations (designated Stations 1-7) were established as representatives of the zones and regions of the reservoir and sampling was conducted quarterly. At Stations 1 and 3, only surface water samples were collected while water samples were collected from the surface, mid-depth and close to the bottom at other stations. Samples for total plankton and physico-chemical water quality were analyzed using standard methods. Results: Te result of the study showed that mean dissolved oxygen (P<0.001), biochemical oxygen demand, conductivity, pH (P<0.001), and alkalinity were higher at the surface of the reservoir. As regards seasonal variation, alkalinity, biochemical oxygen demand had the higher mean values during the rainy season. Also, acidity, dissolved oxygen, and pH showed signifcantly (P<0.001) higher values during the rainy season. One hundred and thirtyseven (137) taxa of phytoplankton and 39 taxa of zooplankton were recorded from the reservoir. Te horizontal pattern of variation showed an increase in the mean abundance of most of phytoplankton groups from inﬂow to the dam area while vertical variation showed a decrease in mean abundance from surface to the bottom of the reservoir. Most of the phytoplankton and zooplankton taxa were more abundant during the dry season than in the rainy season. Conclusions: Te study concluded that all the monitored physico-chemical water quality parameters were within the guide level range as of the World Health Organisation (WHO) for drinking water, Owalla Reservoir is qualitatively rich in both phytoplankton and zooplankton and the reservoir can support a viable aquatic community and sustainable fshery production
Zooplanktonic Community Assessment over Space and Time: A biomonitoring Tool in an Artificial Lake
(Asian Journal of Research in Zoology, 2022) Omoboye, Helen Yetunde
Aims: The prime objective of this study is to determine the taxonomic composition of the zooplankton fauna of Esa-Odo Reservoir in Osun State and determine the spatial (horizontal and vertical) and seasonal variations in the composition, distribution abundance, and community structure of the zooplankton community in the reservoir. Study design: sampling stations were selected horizontally and vertically to cover the entire zones of the reservoir. Planktonic samples were collected at two months intervals for two years. Methodology: Samples were collected from the depth using an improvised Meyer’s water sampler. Net and Total plankton were sampled by filtration and sedimentation methods. Planktonic samples were preserved as 5% formalin and 1% Lugol’s solution. Measurement, enumeration, and scaled pictures of the recorded zooplankton were taken using a photomicrograph. The taxonomic composition of zooplankton biota was determined using identification keys. Data analysis was done using PAST Statistical Package. ANOVA was used to determine the spatio-temporal variations. Results: Fiftyty-three (53) pecies of total zooplankton recorded in this study belong to 4 groups: Rotifera, Cladocera, Copepoda, and Insecta. Rotifera was the most represented group (61.21%). Horizontally, 24 species with the highest mean abundance characterized the lacustrine; while 12 species and 10 species were unique to the transition and riverine zones, respectively. Vertically, most species had their mean abundance decreased from the surface to the bottom of the reservoir. Original Research ArticleOmoboye et al.; AJRIZ, 5(1): 31-47, 2022; Article no.AJRIZ.83773 32 A total of nine (9), two (2) and one (1) species were peculiar to the surface, bottom and mid-depth, respectively. Zooplankton organisms were most abundant during the dry season. Conclusion: Esa-Odo Reservoir comprised highly diversified zooplankton fauna with great potential to support rich aquatic community and fishery production. The reservoir can be classified as fairly clean based on the abundance of the rotifer group. However, the lake should be subjected to regular proper monitoring because of the presence of some pollution tolerant copepod species identified among the zooplankton fauna.

Browse

Browsing Department of Environmental Management & Toxicology by Title

Results Per Page

Sort Options