The Washington-Oregon coastal zone is a classical Eastern Boundary Current region. The area is extremely productive, the productivity dependent on near-shore infusions of nutrients into surface layers during wind-driven coastal upwelling. The Washington-Oregon coastline is much more regular than areas off California or off the East Coast, where large capes lend complexity to both the physical environment and the ecosystem response. The relatively straight coastline and broad, deep shelf greatly simplify the physical environment, so that processes responsible for much of the variance are more easily identified. The system response from mid-Oregon northward, although not strictly two-dimensional, is more so than many other coastal areas. Consequently, the system is amenable to the testing of relatively simple models integrating wind forcing with physical, chemical and biological responses in the upper water column. This book is an integrated synthesis of physical, chemical, geological and biological research in a dynamic shelf ecosystem characterized by seasonal, wind-driven upwelling, major river influences, extensive silt deposits, productive pelagic and demersal fisheries, and unique surf-zone communities. The broad scope of the book includes: detailed analyses of physical circulation and sediment transport; production and utilization of organic matter in the marine food web; river influences on regional hydrology and sediment deposition; inputs and inventories of anthropogenic chemicals in the water column and sedimentary deposits. Much of the book is based on primary analyses of previously unpublished data sets. Interdisciplinary approaches are emphasized in models and discussions of coastal upwelling dynamics, hydrographic patterns and anomalies, benthic boundary-layer processes and larval transport, oceanographic influences on commercial stocks, mechanics of chemical cycling and accumulation, and surf-zone p

Table of Contents

1. Broad-Scale Distributional Patterns of Hydrographic Variables on the Washington/Oregon Shelf. Introduction. Data management and reduction. Annual patterns. Interannual variability. Summary. 2. Patterns and Processes of Circulation Over the Washington Continental Shelf and Slope. Introduction. Large-scale setting. Shelf/slope circulation. Effects of submarine canyons. Summary. Conclusions. 3. Primary Production in Washington Coastal Waters. Introduction. Methods. Patterns of phytoplankton distribution. Environmental parameters. Patterns of primary production. Regulation of primary production. Future directions. 4. Phytoplankton-Nitrogen Interactions. Introduction. Methods. Results and discussion. Conclusions. 5. Abundance, Distribution, and Grazing Impact of Zooplankton on the Washington Shelf. Introduction. Abundances and distributions of grazer populations. Feeding rate estimates. Community grazing impact. Grazing and particle flux. Summary. 6. Coastal Upwelling Dynamics. Introduction. The data set. Environmental setting. Analysis. Results. Discussion. Summary. 7. Seasonal Dynamics of Suspended Particulate Matter. Introduction. Methods and data base. Seasonal changes over the continental shelf. Continuity of shelf SPM distributions over the continental slope. Summary and conclusions. 8. Sediment Transport and Deposition on the Washington Continental Shelf. Introduction. Description of the Washington continental shelf. A sediment transport model for a stratified flow in combined wave-current events: theory. Method of solution of the theoretical model. Model results at a single site. Comparison of results of several cases. The areal distribution of erosion and deposition. Summary. Conclusions. 9. Benthos and its Interaction with Bottom Boundary Layer Processes. Introduction. Benthos of the Washington shelf. Conclu


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© 1989
Elsevier Science
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