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Bioassessment of Freshwater Ecosystems - Using the Reference Condition Approach (Paperback, Softcover reprint of the original 1st ed. 2004)
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Bioassessment of Freshwater Ecosystems - Using the Reference Condition Approach (Paperback, Softcover reprint of the original 1st ed. 2004)
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Aquatic ecosystem assessment is a rapidly developing field, and one
of the newer approaches to assessing the condition of rivers and
lakes is the Reference 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 in a river
system or next-bay-over reference sites in a lake, an array of
ecologically similar, least-exposed to stress sites scattered
throughout a catchment or region is used. Once the reference
condition has been established, any site suspected of being
impacted can be assessed by comparison to the reference sites, and
its status determined. The Reference Condition database, once
formed, can be used repeatedly.
The Reference Condition is established by standardized sampling of
both the biota and its environment at a number of reference sites.
A variety of environmental variables is measured in conjunction
with sampling the biota (usually benthic invertebrates). In this
book, we describe the basic methods involved in selecting and
sampling appropriate reference sites, comparing test sites to
appropriate reference sites using predictive modeling, and
determining whether or not test sites are in the reference
condition. This provides a rapid assessment method that can deal
with everything from large-scale, national issues to local-scale
problems with the same approach, and often parts of the same
database.
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