2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2019 | 12:00 PM - 12:15 PM | DEVELOPMENT OF MACROINVERTEBRATES MULTIMETRIC INDEX FOR ECOLOGICAL EVALUATION OF A RIVER IN NORTH CENTRAL NIGERIA | 250 DE
DEVELOPMENT OF MACROINVERTEBRATES MULTIMETRIC INDEX FOR ECOLOGICAL EVALUATION OF A RIVER IN NORTH CENTRAL NIGERIA
Benthic macroinvertebrates based multimetric index was developed for River Chanchaga, North Central Nigeria. Our multimetric approach included four sampling stations along the river for 29 metrics representing 13 categories. Macroinvertebrates were sampled seasonally between March 2017 and February 2018. Assessment of water quality impacts on macroinvertebrates was based on the discriminatory ability of metrics between station 1 and the other three stations downstream and on their correlation with the physico-chemical variables. Four ecological category/river health conditions were outlined: very poor (E/F), poor (D), fair (C) and good (B). It was inferred that stations 2 and 3 were fair indicative of ecological category C while station 4 was poor indicative of D. Seasonal variation of the ecological integrity of the river revealed that station 2 was less perturbed in the dry season. Canonical correspodnce analysis (CCA) of 13 component metrics in the MMIchanchaga with physicochemical variables showed no significant correlation while the Bray-curtis similarity test revealed that stations 2 and 3 were more associated in the MMIchanchaga than any other station combined. The study revealed that the River is relatively perturbed by various degrees of pollution processes.
note: article has been published.
- Invertebrate
- Pollution
- Assessment
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Presenters/Authors
Ovie Edegbene
(), Institute for Water Research, Rhodes University, Grahamstown, South Africa, ovieedes@gmail.com;
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Luckey Elakhame
(), Department of Zoology, Ambrose Alli University, Ekpoma, Nigeria, elakhame@yahoo.com;
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Francis Arimoro
(), Federal University of Technology, Minna, Nigeria, francisarimoro@gmail.com;
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Eki Osimen
(), Department of Zoology, Ambrose Alli University, Ekpoma, Nigeria, eki4success@gmail.com;
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Nelson Odume
(), Institute for Water Research, Rhodes University, Grahamstown, South Africa, nelskaro@yahoo.com;
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