In maintaining health aquatic ecosystem, there is the need to have a balance biotic and abiotic factors thus this study was conducted to assess some physical, chemical and biological parameter of Lake Dangana in Lapai, Niger State for period of eight (8) month (January-August, 2020) in identified sample stations using standard protocols and procedures. The result revealed mean Temperature (23.5-26.5ºC), Dissolved oxygen concentration (3.96-4.13mg/l), Biochemical Oxygen Demand (3.00-3.12mg/l), pH value (6.88-7.11), conductivity (86.43-94.80µS/cm), nitrate (0.67-0.76mg/l) and phosphate (0.85-1.04mg/l). There was no significant difference (p>0.05) in the monitored Water temperature, Dissolved Oxygen, Biochemical oxygen Demand and pH between sampling station. However, electrical conductivity, nitrate and phosphate differs significantly (p<0.05) among sampling stations. Similarly, significant difference (p<0.05) was noticed among sampling months in all the physicochemical parameters measured. A total of 318 individuals from 13 species and 10 families of macroinvertebrates were encountered during the study period. Percentage occurrence revealed; Hemiptera (35.52%), Coleopterans (34.59%), Odonata (22.95%), dipterans (5.03%) and Oligochaetes (1.87%). The canonical correspondence analysis (CCA) ordination plot showed a good relationship between measured physicochemical parameters and macroinvertebrates distribution and composition. Six (6) species of bacteria were isolated, four Gram positive bacteria and two (2) Gram negative bacteria. The Gram-positive bacteria were Bacillus sp. Escherichia coli, Micrococcus sp and Staphylococcus aureus. Whilst, the two Gram-negative bacteria were Klebsiella sp and Pseudomonas sp. Five (5) species of fungi were isolated; Aspergillus fumigates, Aspergillus niger, Aspergillus flavus, Penicillium sp and Mucor sp. All the fungi isolates were found in all the sampling stations of the lake. The presence of some of these microorganisms is an indicator of contamination which implies that the water body is contaminated with fecal matter; thus, the pathogenic bacteria and the low water quality constitutes danger to public health.
Ecological systems change over time due to anthropogenic and natural activities, regular monitoring is therefore necessary for identifying malignant changes and conservation of biodiversity. This study was undertaken to ascertain the health and biological diversity of Lake Dangana using both biotic and abiotic indicators. Samples for physico-chemical and biological analyses were collected monthly from four sampling stations in Lake Dangana from January to August, 2020 using standard methods. The results of physico-chemical variables were: temperature (23.5-26.5ºC), dissolved oxygen (3.96-4.13mg/l), biochemical oxygen demand (3.00-.12mg/l), pH (6.88-7.11), conductivity (86.43-94.80µS/cm), nitrate (0.67-0.76mg/l) and phosphate (0.85-1.04mg/l). Conductivity, nitrate and phosphate varied significantly (p<0.05) between stations. A total of 318 individuals from 13 species and 10 families of macroinvertebrates were encountered during the study period. Hemiptera (35.52%), Coleopterans (34.59%), Odonata (22.95%), Dipterans (5.03%) and Oligochaetes (1.87%) were the dominant groups. The first two Canonical Correspondence Analysis (CCA) axes explained 87.33% of macroinvertebrate-environment relationship and pH (-0.99), BOD5 (-0.62), nitrate (-0.61), conductivity (-0.59) and phosphate (-0.57) were the dominant structuring factors. Six bacteria species; Bacillus sp, Escherichia coli, Micrococcus sp., Staphylococcus aureus, Klebsiella sp and Pseudomonas sp. and five fungi species; Aspergillus fumigatus, A. niger, A. flavus, Penicillium sp and Mucor sp. were encountered. The presence of some of these microorganisms such as E. coli in the lake is an indication of faecal contamination and this could endanger public health.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.