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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 20, No. 4, 2016, pp. 1097-1103
Bioline Code: ja16118
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 20, No. 4, 2016, pp. 1097-1103

 en Evaluation of some Physicochemical Parameters and Benthic Macroinvertebrates of Ikere Gorge Reservoir in Oyo State, Nigeria
AIWERIOGHENE, ABED-NEGO OSAYANDE & ADEDOLAPO, ABEKE AYOADE

Abstract

The physico-chemical parameters and benthic macroinvertebrates of Ikere Gorge Reservoir were studied to assess the impact of anthropogenic activities on this man-made lake by collecting surface water and benthic samples. Physico-chemical parameters were within the allowable limits of USEPA for fresh water bodies apart from conductivity (0.055 ± 0.002μS/cm) which was below standard. There were significant differences (p<0.05) in the mean values of DO, BOD, TDS, transparency, nitrate and sulphate between the sampling stations. A total of six genera ( Chironomus check for this species in other resources , Melanoides check for this species in other resources , Cloeon check for this species in other resources , Bulinus check for this species in other resources , Bellamya check for this species in other resources and Hirudo check for this species in other resources ) of benthic macro-invertebrates belonging to six orders (Diptera, Pelecypoda, Ephemeroptera, Heterobranchia, Caenogastropoa and Hirudinida) were recorded in the reservoir during the study. Pollution tolerant species including Melanoides tuberculata check for this species in other resources and Chironomus sp. dominated the benthic macroinvertebrates with a total number and percentage abundance of 674(56.88%) and 435(36.71%), respectively. Ikere Gorge Reservoir is relatively under stress due to dominance of indicators of pollution.

Keywords
Anthropogenic activities; Bioindicator; Ikere Gorge Reservoir; Melanoides tuberculata; Water quality

 
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