Freshwater Biological Traits Database (External Review Draft)

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This draft report discusses the development of a database of freshwater biological traits. The database combines several existing traits databases into an online format. The database is also augmented with additional traits that are relevant to detecting climate change-related effects, especially traits related to temperature tolerances and flow.

This draft report and the Freshwater Biological Traits Database are intended for resource 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 and universities.

Access to the on-line Freshwater Biological Traits Database

Downloads: report, appendices, traits database and link to Tetra Tech site
Access to site:

Username: Traits
Password: Alogon2010


EPA will host an external peer review meeting on May 11, 2011 as announced in the Federal Register Notice. The report and database will be revised based on review comments received and will be published as a final EPA report and online database in the summer of 2011.


U.S. EPA. Freshwater Biological Traits Database (External Review Draft). U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-11/038A, 2011.


Aug 2009EPA performed an internal review of the draft report. Then held regional workshops and discussed traits database. See timeline on webpage:
Apr 2011EPA released the external review draft report for public review and comment.

Additional Information

Comments on the assessment may be submitted and reviewed using the e-Government Web site. From the site, select “Environmental Protection Agency” and the keyword “EPA-HQ-ORD-2011-0368" (for the docket ID) to comment on this report.