Implications of Climate Change for State Bioassessment Programs and Approaches to Account for Effects (Final Report)
This report is intended for managers and scientists working on biological indicators, bioassessment, biomonitoring, and biocriteria, particularly in the EPA’s Office of Water and Regions, and also at state agencies. The report uses biological data collected by four states – Maine, North Carolina, Ohio and Utah – shallow or wadeable rivers and streams. The biological data are aquatic insects, clams, shrimp-like organisms, and worms known as benthic macroinvertebrates. These organisms are important biological indicators used to assess the condition of waterbodies.
This report shows that some of these biological indicators are more sensitive to changes in water temperature than others. While these indicators can be useful in determining effects related to climate change, they can also confound measurements that have traditionally been used to signal impairment to a stream or river. Because of this, it is not always clear whether changes in biomonitoring data are affected by climate change or other stressors. One way to distinguish these effects is through long-term monitoring of high-quality, generally undisturbed rivers and streams. Current monitoring is not designed to detect the effects of long-term changes in water temperature or streamflow on benthic macroinvertebrates or other organisms in rivers and streams. A more comprehensive monitoring design would enhance the ability of water program assessments to understand if climate change or other stressors is causing changes in biomonitoring data. This final report provides a foundation for understanding if biological indicators that are used to provide a signal of stream or river impairment are vulnerable to changes in climate. It also provides insight into how the effectiveness of monitoring and management plans can be maintained under changing climatic conditions.
|Feb 2008||EPA hosted a workshop on Bioindicators and Climate Change in Crystal City, VA on Feb 19-21, 2008.|
|Aug 2009||EPA conducted an internal review of report. Then held regional workshops. See timeline on webpage: http://www.epa.gov/ncea/global/regional_shops.htm|
|Sep 2010||EPA conducted a workshop in the Northeast to present study results based on data from Maine.|
|Oct 2010||EPA conducted a workshop in the Southwest to present study results based on data from Utah.|
|Dec 2010||EPA conducted a workshop in the Southeast to present study results based on data from North Carolina.|
|Oct 2010||EPA conducted a workshop in the Midwest to present study results based on data from Ohio.|
|Dec 2010||Published journal articles in special section of Journal of the North American Benthological Society.|
|Apr 2011||EPA released the external review draft for public review and comment.|
|May 2011||EPA held an an independent peer review workshop to discuss the draft report.|
|Jul 2012||EPA released the Freshwater Species Traits Database and Final Report.|
|Sep 2012||EPA released the final report.|
This download(s) is distributed solely for the purpose of pre-dissemination peer review under applicable information quality guidelines. It has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency determination or policy.
- (487 pp, 23 MB, about PDF)