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Biological Condition of the Ring and Stitt Rivers: Survey of aquatic biota, Spring 2006. Report to Zinifex, Rosebery.


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Davies, PE ORCID: 0000-0003-2651-4061, Cook, LSJ and Sloane, T 2006 , Biological Condition of the Ring and Stitt Rivers: Survey of aquatic biota, Spring 2006. Report to Zinifex, Rosebery..

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This report describes the results of a survey conducted in spring (October) 2006 in the Ring and Stitt Rivers, comprised of a single, spring seasonal sampling event for macroinvertebrates and fish.

This report forms part of what is now a routine biomonitoring exercise for the Ring and Stitt catchments, previously reported in autumn and spring 2005 and autumn 2006 (Davies et al. 2005a, b; 2006), which was preceded by a detailed survey conducted in 2003/04 (Davies et al. 2004).

The primary aims of this monitoring are to:
• describe the status of macroinvertebrate and fish assemblages in the Ring and Stitt Rivers;
• evaluate changes over time and relate these to environmental conditions (especially habitat and water quality) and management actions (e.g. remediation of Hercules mine, management of wastewaters and drainage in the Rosebery area).

The Ring River has been found to be in a highly degraded ecological condition with low abundances and diversity of macroinvertebrates throughout, and a complete absence of fish (Davies et al. 2004; 2005a, b; 2006). The ecological condition of the Stitt River was found to be less impaired than the Ring, though sites in the lowest reaches approached the condition of Ring River reaches.

The current monitoring program follows the protocol use by Davies et al. (2004), with sampling of instream fauna at a number of sites in the Ring River and selected tributaries, in the Stitt River both upstream and downstream of pollution sources, and in a reference river the Sterling.

Monitoring is being conducted annually with one sampling event in each of spring and autumn. This report provides a summary of the spring 2006 survey data. A detailed analysis of trends in all data for both river systems since 2003/04 will be reported in the Autumn 2007 report.

Item Type: Report (Project Report)
Authors/Creators:Davies, PE and Cook, LSJ and Sloane, T
Keywords: freshwater, ecology, aquatic, river systems, biomonitoring, invertebrates, fauna, biota
Publisher: Freshwater Systems
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