, Volume 210, Issue 1, pp 151-160

First online:

Longitudinal distribution of macroinvertebrates in two rivers subject to salinization

  • W. D. WilliamsAffiliated withDepartment of Zoology, University of Adelaide
  • , R. G. TaaffeAffiliated withDepartment of Zoology, University of Adelaide
  • , A. J. BoultonAffiliated withDepartment of Zoology, University of Adelaide

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Surveys were made of the macroinvertebrates at several locations on the Blackwood River, Western Australia, and the Glenelg River,Victoria. Both rivers have drainage basins subject to salinization from agricultural practices. The Blackwood River has a clear longitudinal salinity profile in which the upper reaches are more saline than lower ones. Multivariate analysis using DECORANA and TWINSPAN did not reveal relationships between macroinvertebrate community composition and salinity. It is suggested that either the present macroinvertebrate fauna of Australian rivers is more tolerant to salinity than has been assumed, or now represents only halotolerant forms of a once more diverse fauna.

Key words

macroinvertebrates salinity salinization rivers Australia