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Main Title The condition of tidal wetlands of Washington, Oregon, and California, 2002 /
Author W. G. Nelson; H. Lee; J. O. Lamberson; F. A. Cole; C. L. Weilhoefer
Other Authors
Nelson, Walter G.
CORP Author National Health and Environmental Effects Research Lab., Corvallis, OR. Western Ecology Div.; Environmental Protection Agency, Washington, DC. Office of Research and Development.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Western Ecology Division,
Year Published 2007
Report Number EPA/620/R-07/002
Stock Number PB2010-106546
OCLC Number 430736737
Subjects Wetland ecology--Washington (State); Wetland ecology--Oregon.; Wetland ecology--California.
Additional Subjects Tidal wetlands; Methods; Sampling; Shoreline land use; Quality assurance; Data analyses; Biological condition; Lessons learned; Washington (State); Oregon; Ocean tides; California; Estuarine intertidal wetland resources
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=9101AA56.txt
Holdings
Library   Call Number Additional Info Location Last
Modified
Checkout
Status
ESAD EPA 620-R-07-002 Region 10 Library/Seattle,WA 08/24/2012
ESAM QH105.W2C66 2007 Region 10 Library/Seattle,WA 12/03/2012
NTIS PB2010-106546 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/22/2010
Collation xvi, 84 p. : col. ill., col. maps ; 28 cm.
Abstract
The National Coastal Assessment (NCA) of US EPA conducted the first probability based assessment of the condition of estuarine intertidal wetland resources of the West Coast of the U.S. in 2002. The study results constitute a baseline estimate of condition of coastal resources that will allow determination of trends in future condition. The dominant types of estuarine intertidal habitat varied among the three states, although unvegetated sand or mud flats were the dominant habitat types for all three states. Shellfish beds (oysters), gravel bottom, and intertidal seagrasses were recorded only in Washington and Oregon. San Francisco Bay and the rest of California tended to have finer sediments, higher Total Organic Carbon, higher concentrations of sediment nitrogen and phosphorus, and higher average Effects Range-Median Quotient (ERM-Q) values than estuarine intertidal areas in Washington and Oregon. Levels of sediment contamination west wide were low, with only 0.21% of the intertidal area of West Coast estuaries having >5 exceedances of Effects Range Low (ERL) concentrations. The single most abundant polychaete in the West Coast intertidal was a nonindigenous species introduced from the Northeast Atlantic. Vegetation was present at two thirds of the sites sampled and included 28 emergent macrophytes, 2 seagrasses, and macroalgal taxa. Findings confirm results from previous National Coastal Assessment studies of west coast estuaries that have indicated sediment contamination issues are limited in extent, but that west coast estuaries have been broadly invaded by nonindigenous species.
Notes
"September 2007." "EPA/620/R-07/002." Includes bibliographical references (p. 60-62).