Titlebook: Bioassessment of Freshwater Ecosystems; Using the Reference Robert C. Bailey,Richard H. Norris,Trefor B. Reyno Book 2004 Springer Science+

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Book 2004rence Condition Approach. This is a significant advancement in biomonitoring because it solves the problem of trying to locate nearby control or reference sites when studying an ecosystem that may be degraded, a problem that bedevils traditional approaches. Rather than using upstream reference sites

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Introduction to the Case Studies,s: the lentic, near shore environment of the North American Great Lakes; tributaries of the Fraser River, a large, west-coast basin in Canada; and the upper Murrumbidgee River basin in the Australian Capital Territory.

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Defining the Reference Condition,base of biological and environmental attributes that represent the Reference Condition. The database is used to describe variation in the Reference Condition and build predictive models that explain as much as possible of the variation in biological characteristics among reference sites by variation

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Decision-Making,y that those data would be collected if the null hypothesis were true (Quinn and Keough 2002). If the probability is small enough, we reject the null hypothesis and conclude that the alternative hypothesis is supported.

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Beyond Pass and Fail,that are advances in aquatic ecosystem assessment, It moves beyond more traditional assessment methods by describing variation in relatively widespread reference sites, by developing predictive models that relate biota to the characteristics of their environment, and by setting appropriate decision-

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