Index Catalog // ScholarsArchive@OSU

Creator:: Fujita, Rodney M., Wheeler, Patricia A., and Edwards, Robert L.
Abstract:: The relationship between nitrogen (N) availability and the growth of macroalgae in a seasonal upwelling region (Yaquina Head, Oregon, USA) was investigated. Water column nutrient concentrations were relatively high and stable during the winter, decreased in early spring, and were highly variable in the summer and early fall. Periods of...
Resource Type:: Article
Full Text:: region Rodney M. Fujita*, Patricia A. Wheeler**, Robert L. Edwards College of Oceanography, Oregon

Creator:: Suryan, Robert M., Kuletz, Kathy J., Parker-Stetter, Sandra L., Ressler, Patrick H., Renner, Martin, Horne, John K., Farley, Edward V., and Labunski, Elizabeth A.
Abstract:: The Bering Sea is a highly productive ecosystem with abundant prey populations in the summer that support some of the largest seabird colonies in the Northern Hemisphere. In the fall, the Bering Sea is used by large numbers of migrants and post-breeding seabirds. We used over 22000 km of vessel-based...
Resource Type:: Article

Creator:: Tranvik, Lars J., Sherr, Evelyn, and Sherr, Barry F.
Abstract:: A variety of macromolecules labeled with FITC (fluorescein isothiocyanate), including carbohydrates (dextran) and proteins (ferritin, casein, albumin, concavalin A), spanning a range of molecular weights from 55 to 2000 kD, were actively ingested by marine heterotrophic flagellates at substrate concentrations of 1 to 10 mg/L. The uptake capacity for the...
Resource Type:: Article
Full Text:: -phenylindole, 10 yg ml-l, final concentration) for 7 to 10 min, and filtered onto 0.8 pm black polycarbonate

Creator:: Gonzalez, Juan M., Sherr, Barry F., and Sherr, Evelyn
Abstract:: We propose quantification of the activity of digestive enzymes as a novel way to estimate rates of protist grazing in natural waters. Our first application of this approach was determination of protistan bacterivory by assaying the activity of lysozyme at acid pH. Lysozyme specifically degrades peptidoglycan, a major structural component...
Resource Type:: Article
Full Text:: 2 stations at sea, nearshore (NS-l) and offshore (OS-l), were located in the Pacific Ocean at 42

Creator:: Bracken, Matthew E. S., Menge, Bruce A., Foley, Melissa M., Sorte, Cascade J. B., Lubchenco, Jane, and Schiel, David R.
Abstract:: Filter-feeding invertebrates consume phytoplankton and detritus and therefore serve as important mediators of the exchange of materials from nearshore pelagic to intertidal benthic ecosystems. Here, we evaluated the linkages between nearshore and intertidal systems on temperate rocky reefs on the coasts of Oregon, USA, and New Zealand’s South Island. We...
Resource Type:: Article
Full Text:: collected water samples and measured total POC (mg l−1), chl a (µg l−1), C:chl a (µg µg−1), and carbon

Creator:: Du, Xiuning, Peterson, William, and O'Higgins, Linda
Abstract:: Phytoplankton species were enumerated from 72 samples collected biweekly during the upwelling season (May to August) of 2001−2010 to test for effects of interannual variations in upwelling and decadal basin-scale variability on phytoplankton species composition and community structure. Cluster analysis of phytoplankton community structure identified 7 groups; 1 group was...
Resource Type:: Article
Full Text:: total cell abundance of diatoms and dinoflagellates was calculated as numbers per liter (cells l−1

Creator:: Tomaro, Londi M., Teel, David J., Peterson, William T., and Miller, Jessica A.
Abstract:: Early ocean residence is considered a critical period for juvenile salmon although specific survival mechanisms are often unidentified and may vary by species or life stage. Columbia River spring-run Chinook salmon Oncorhynchus tshawytscha abundance has declined dramatically since the early 1900s. To elucidate mechanisms of early marine survival, we tested...
Resource Type:: Article
Full Text:: l d –1 ) M ea n gr ow th r at e (% b l d –1 ) a c O b se rv ed fo rk le ng th

ScholarsArchive@OSU