Assessment of two persistent bioaccumulative toxicants in the UNESCO protected river of Osun-Osogbo, Nigeria

Assessment of two persistent bioaccumulative toxicants in the UNESCO protected river of... Introduction: Osun River dissecting the Osun-Osogbo Sacred Grove, though inscribed on the World Heritage List, has been rarely assessed for biodiversity values or ecotoxicology. In this study, we investigated the concentrations of Cu and Zn in the benthic sediments and two dominant gastropod species (Melanoides tuberculata and Lanistes varicus) of the Osun River. Benthic sediment and gastropod samples were collected on quarterly basis from June 2015 to March 2016 along the longitudinal stretch of the river. Dry samples were digested and analysed for Cu and Zn using the atomic absorption spectrophotometry. Results: With the exception of September sampling period, the two metals recorded higher values in the animals than in the sediments. Cu (1.23 ± 0.81 μg/g) was much lower (p < 0.01) than zinc (6.29 ± 2.15 μg/g) in the benthic sediments. In the same vein, Cu was significantly lower (p < 0.01) than Zn in both species. Both metals recorded much lower values than their average concentrations in the Earth’s crust as well as the recommended limits for freshwater life. Comparatively, L. varicus recorded higher bioaccumulation factor than M. tuberculata. Conclusions: Findings from this study suggest that both metals posed no toxicological risk to the freshwater system http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ecological Processes Springer Journals

Assessment of two persistent bioaccumulative toxicants in the UNESCO protected river of Osun-Osogbo, Nigeria

Loading next page...
 
/lp/springer_journal/assessment-of-two-persistent-bioaccumulative-toxicants-in-the-unesco-Jb0RlxEloX
Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by The Author(s).
Subject
Environment; Environment, general
eISSN
2192-1709
D.O.I.
10.1186/s13717-017-0097-1
Publisher site
See Article on Publisher Site

Abstract

Introduction: Osun River dissecting the Osun-Osogbo Sacred Grove, though inscribed on the World Heritage List, has been rarely assessed for biodiversity values or ecotoxicology. In this study, we investigated the concentrations of Cu and Zn in the benthic sediments and two dominant gastropod species (Melanoides tuberculata and Lanistes varicus) of the Osun River. Benthic sediment and gastropod samples were collected on quarterly basis from June 2015 to March 2016 along the longitudinal stretch of the river. Dry samples were digested and analysed for Cu and Zn using the atomic absorption spectrophotometry. Results: With the exception of September sampling period, the two metals recorded higher values in the animals than in the sediments. Cu (1.23 ± 0.81 μg/g) was much lower (p < 0.01) than zinc (6.29 ± 2.15 μg/g) in the benthic sediments. In the same vein, Cu was significantly lower (p < 0.01) than Zn in both species. Both metals recorded much lower values than their average concentrations in the Earth’s crust as well as the recommended limits for freshwater life. Comparatively, L. varicus recorded higher bioaccumulation factor than M. tuberculata. Conclusions: Findings from this study suggest that both metals posed no toxicological risk to the freshwater system

Journal

Ecological ProcessesSpringer Journals

Published: Aug 24, 2017

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off