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Bioassessment of Freshwater Ecosystems : Using the Reference Condition Approach - Robert C. Bailey

Bioassessment of Freshwater Ecosystems

Using the Reference Condition Approach

Hardcover Published: 5th April 2005
ISBN: 9781402076701
Number Of Pages: 170

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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.

Prefacep. ix
Bioassessment of Freshwater Ecosystemsp. 1
Introductionp. 1
Key conceptsp. 5
Development of the Reference Condition Approachp. 8
Points to rememberp. 15
Introduction to the Case Studiesp. 17
Sediment assessment of the near shore environment of North American Great Lakesp. 18
Fraser River (British Columbia) biomonitoring programp. 20
Spring and Autumn Assessment of Streams in the Australian Capital Territoryp. 23
Points to rememberp. 25
Defining the Reference Conditionp. 27
Define the objectives of the studyp. 28
Determine the spatial extent, time-scale and grain-size of the studyp. 29
Determine the criteria for acceptable reference sitesp. 36
Determine the appropriate number and locations of reference sitesp. 41
Choose descriptors of the benthic invertebrate community and its environmentp. 43
Design a data storage and management systemp. 47
Ensure data qualityp. 48
Case Studiesp. 50
Points to rememberp. 61
Variation in the Reference Conditionp. 63
Why characterizing reference site variation is importantp. 63
How to describe variation among reference sitesp. 64
Case Studiep. 68
Why it is important to model and explaine variation among reference sitesp. 84
How to model variation among reference sitesp. 87
Why residual variation among reference communities is importantp. 92
Case studiesp. 100
Points to rememberp. 118
Decision-Makingp. 119
Why do we need decision rules on passing and failing test sitesp. 119
How are decision rules arrived at?p. 121
Sensitivity of assessments: how often do real test sites fail?p. 125
Case Studiesp. 126
Points to rememberp. 131
Beyond Pass and Failp. 133
Severity of fail: Magnitude and nature of deviation from Reference Conditionp. 133
Why did it fail?p. 136
Scenario building: What will be the effect of rehabilitation or stress?p. 141
Points to rememberp. 144
The Reference Condition Approach: In a nutshellp. 145
Bioassessment of freshwater ecosystems using the Reference Condition Approachp. 145
Case Studiesp. 146
Defining the Reference Conditionp. 147
Describing and modeling variation in the Reference Conditionp. 148
Decision-Makingp. 150
Beyond Pass and Failp. 151
Finishp. 152
Referencesp. 153
Indexp. 169
Table of Contents provided by Ingram. All Rights Reserved.

ISBN: 9781402076701
ISBN-10: 1402076703
Audience: General
Format: Hardcover
Language: English
Number Of Pages: 170
Published: 5th April 2005
Publisher: Springer-Verlag New York Inc.
Country of Publication: US
Dimensions (cm): 23.98 x 16.56  x 1.07
Weight (kg): 0.4

Earn 426 Qantas Points
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