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OLS Field Name OLS Field Data
Main Title The evaluation of methods for creating defensible, repeatable, objective and accurate tolerance values for aquatic taxa [electronic resource] /
Author Blocksom, Karen A. ; Winters, L.
Other Authors
Author Title of a Work
Winters, Lori.
CORP Author Environmental Protection Agency, Cincinnati, OH. National Exposure Research Lab. ;Oak Ridge Inst. for Science and Education, TN.;Environmental Protection Agency, Washington, DC. Office of Research and Development.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory,
Year Published 2006
Report Number EPA 600/R-06/045
Stock Number PB2007-102023
OCLC Number 173189485
Subjects Aquatic invertebrates--Effect of water quality on. ; Water quality. ; Water--Analysis.
Additional Subjects Aquatic biology ; Tolerances(Physiology) ; Bioassessment ; Environmental degradation ; Taxa ; Genus ; Species ; Metrics ; HBI(Hilsenhoff biotic index)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB2007-102023 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 04/04/2019
Collation xiii, 52 p. : digital, PDF file.
Abstract In the field of bioassessment, tolerance has traditionally referred to the degree to which organisms can withstand environmental degradation. This concept has been around for many years and its use is widespread. In numerous cases, tolerance values (TVs) have been assigned to individual taxa or groups of taxa to represent their tolerance to pollution. The TVs are then often combined into metrics which describe characteristics of aquatic communities. Perhaps the most familiar example is the Hilsenhoff Biotic Index (HBI) (Hilsenhoff, 1977), an index that has been incorporated into many bioassessment programs. The HBI is typically very useful in distinguishing among sites of higher and lower water quality. To calculate the HBI, each environmental agency or organization typically uses its own set of tolerance values. However, the origins of these values, and rationales for their selection, are often obscure and unverifiable. Available methods for deriving TVs more objectively vary substantially in approach and complexity. Therefore, this study conducted systematic comparisons of existing lists of macroinvertebrate TVs and their resulting HBI scores. It also compared several objective TV derivation approaches, as well as bioassessment metrics derived from each, to determine their repeatability and sensitivity to disturbance. All analyses were run at the family and genus levels.
Notes Title from title screen (viewed Sept. 19, 2007). "May 2006." "EPA 600/R-06/045."
Place Published Cincinnati, OH.
Supplementary Notes Prepared in cooperation with Oak Ridge Inst. for Science and Education, TN. Sponsored by Environmental Protection Agency, Washington, DC. Office of Research and Development.
Availability Notes Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
Access Notes Mode of access: Internet from the EPA web site. Address as of 9/19/2007: http://www.epa.gov/eerd/pdf/TolValuesReport%5FEPA600-R06-045.pdf; current access is available via PURL.
Corporate Au Added Ent National Exposure Research Laboratory (U.S.)
Alternate Title Creating defensible, repeatable, objective and accurate tolerance values for aquatic taxa
PUB Date Free Form 2006
BIB Level m
Medium electronic resource
Cataloging Source OCLC/T
Merged OCLC records 979938538; 980090320
OCLC Time Stamp 20090508131730
Language eng
SUDOCS Number EP 11.2:EV 1
Origin OCLC
OCLC Rec Leader 01586cam 2200373Ia 45020