Ecological health of the Usuthu and Mbuluzi rivers in Swaziland based onselected biological indicators

Authors: Magagula, C. N.; Mansuetus, A. B.; Tetteh, J. O.

Source: African Journal of Aquatic Science, Volume 35, Number 3, December 2010 , pp. 283-289(7)

Publisher: Taylor and Francis Ltd

Buy & download fulltext article:


Price: $53.16 plus tax (Refund Policy)


Biological monitoring, using coliform bacteria and macroinvertebrate populations and diversity, was carried out monthly from August 2004 to January 2005 to determine the ecological health of the Usuthu and Mbuluzi rivers in Swaziland. Water temperature and pH were not significantly different between sites, but differed significantly between months. Bacterial species identified from both rivers were Escherichia coli, Klebsiella pneumoniae and Proteus vulgaris, with no significant differences in mean colony counts between the two rivers. Average colony counts were significantly different between months. A total of 926 macroinvertebrates, representing 28 families, were collected from both rivers and were significantly different between sites, rivers and months. Macroinvertebrate populations and diversity were negatively correlated with bacterial colony counts. Compliance with regulated water quality standards did not necessarily indicate acceptable water quality for biological communities, and thus there is a need for an integrated approach in water quality monitoring.

Keywords: biological monitoring; coliform bacteria; macroinvertebrates

Document Type: Research Article


Affiliations: Department of Biological Sciences, University of Swaziland, Kwaluseni, Swaziland

Publication date: December 1, 2010

More about this publication?
  • Co-Published by NISC and Taylor & Francis - Subscriber access available here
Related content


Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content

Text size:

A | A | A | A
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages. print icon Print this page