Back

Document Title:

Using the Sediment Quality Triad to characterize baseline conditions in the Anacostia River, Washington, DC, USA

AUTHOR(S):
Alfred E. Pinkney Beth L. McGee Daniel J. Fisher Jeffrey Ashley David Velinsky Leonard C. Ferrington Teresa J. Norberg-King


VOLUME:
156
ISSUE:
1-4
PAGES:
51 - 67

PUBLICATION DATE: September 2009

ABSTRACT:
The Sediment Quality Triad (SQT) consists of complementary measures of sediment chemistry, benthic community structure, and sediment toxicity. We applied the SQT at 20 stations in the tidal portion of the Anacostia River from Bladensburg, MD to Washington, DC to establish a baseline of conditions to evaluate the effects of management actions. Sediment toxicity was assessed using 10-day survival and growth tests with the freshwater amphipod, Hyalella azteca and the midge, Chironomus dilutus. Triplicate grabs were taken at each station for benthic community analysis and the Benthic Index of Biotic Integrity (B-IBI) was used to interpret the data. Only one station, #92, exhibited toxicity related to sediment contamination. Sediments from this station significantly inhibited growth of both test species, had the highest concentrations of contaminants, and had a degraded benthic community, indicated by a B-IBI of less than 3. Additional sediment from this station was tested and sediment toxicity identification evaluation (TIE) procedures tentatively characterized organic compounds as the cause of toxicity. Overall, forty percent of the stations were classified as degraded by the B-IBI. However, qualitative and quantitative comparisons with sediment quality benchmarks indicated no clear relationship between benthic community health and contaminant concentrations. This study provides a baseline for assessing the effectiveness of management actions in the Anacostia River.

PUBLICATION:
Environmental Monitoring and Assessment

PUBLISHED BY:
Springer Netherlands

DOCUMENT LINK:
http://www.springerlink.com/content/0rx83134701h1510/v, 1 MB

NOTE: This link will take you to a site outside of the U.S. Fish and Wildlife Service. We do not control the content or policies of the site you are about to visit. You should always check site policies before providing personal information or reusing content.

ADDITIONAL LINKS:

Chesapeake Bay Field Office Contaminants Program

Last updated: February 13, 2013