The relationship between electrical conductivity and selected macroinvertebrate communities in four river systems of south-west Victoria, Australia

Kluwer Academic Publishers
Publication Type:
Journal Article
International Journal of Salt Lake Research, 1998, 7 pp. 153 - 170
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1n order to relate macroinvertebrate fauna to electrical conductivity (EC), a survey of selected orders of macroinvertebrates was conducted in the Glenelg. Hopkins, Merri and Burwon River Catchments in south-west Victoria, Australia. The survey consisted of sampling 21 paired sites at confluences of streams. There was little difference between the in~streal11 habitat but there was a range of differences in EC between each of the paired sites. The dissimilarity of macroinvertebrate fauna between the paired sites was compared to the proportional difference in Ee and other water quality variables (dissolved oxygen, water temperature, pH, N02-N, N03-N, P04 and turbidity). This allowed the elimination of Ee being confounded with geographical scale parameters and took into account other water quality parameters that may be confounded with Ee. A positive relationship was found between the dissimilarity of the fauna at each of the two paired siles and the proportional difference in Ee. No such relationship was found for any other measured water quality variable. The results of this survey show that macroinvertebrale community structure is associated with EC of the river systems investigated after eliminating large scnle geographical patterns, in-stream habitat and the measured water quality parameters.
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