Research presented in this report was initiated in September 1979, and continued until 30 September 1981, when the PNRBC was abolished by the federal government. During this period the Benthic Primary Production work Unit of CREDDP designed a sampling program compatible with the contract work tasks, developed field methods and procedures, conducted research at intensive study sites, and initiated sampling at a series of validation and survey sites. After the program resumed again under the administration of CREST in November 1982, the principal activities of the work unit included data organization, data anlysis, preparation of maps of selected variables, and report preparation. Additional financial support for the research was obtained in August 1982 from the U.S. Army Corps of Engineers. This support was provided for an analysis of the taxonomic structure of benthic diatom assemblages in relation to salinity patterns in the Columbia River Estuary.
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