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The Marine Mammal Investigations team of the Washington Game Department began an extensive research program in 1980 to document marine mammal populations of the region and document their relationship to fisheries of the area. The overall research program has received funding from multiple sources, including: National Marine Fisheries Service, the U.S. Marine Mammal Commission, the Columbia River Estuary Data Development Program (CREDDP) and the Washington Game Department. Material contained in this report represents a summary of the overall research results as they relate to the Columbia River

This report summarizes the results of several years of research into the sedimentology of the Columbia River Estuary. Two major objectives were attained during the study: 1) the sedimentology of the estuary was investigated and described, and 2) some understanding was gained of the processes important to sedimentation. As an introduction to the present study, background information on the tectonic, geologic, and oceanographic settings of the estuary are provided, as well as a brief listing of previous sedimentological studies performed in the estuary. The changes in relative sea level, the

The Emergent Plant Primary Production Work Unit of the Columbia River Estuary Data Development Program (CREDDP) describes the species composition, standing crop, and primary production dynamics of the tidal marsh vegetation found within the estuary. An estuary-wide field reconnaissance conducted in October 1979 confirmed the floristic diversity of Columbia River Estuary tidal marshes and suggested that their species composition reflected: salinity changes from the marine estuary mouth to freshwater conditions upstream, and low marsh to high marsh elevation changes. Twenty-two broadly

This report on water column primary production in the Columbia River Estuary was prepared for the Columbia River Data Development Program by Drs. Bruce E. Frey and Lawrence F. Small of the College of Oceanography, Oregon State University, Corvallis, Oregon, and Dr. Ruben Lara-Lara, of the Centro de Investigacion Cientifica y Educacion Superior de Ensenada, Ensenada, Mexico. Also participating in this project were Ms. RaeDeane Leatham and Mr. Stanley Moore. This program was designed to study the water column primary production of the Columbia River Estuary, and the factors affecting primary

Zooplankton and larval fish data were collected by the University of Washington in 1980-81 as part of the Columbia River Estuary Data Development Program. Oregon Department of Fish and Wildlife analyzed these data. Two aspects of zooplankton and larval fish ecology were emphasized: (1) the structure of assemblages and their relationship to physical and biological factors in the the estuary, and (2) the temporal and spatial distribution and density of zooplankton and larval fish in the estuary.