Index Catalog // ScholarsArchive@OSU

Distribution and community structure of ichthyoplankton off the coast of Oregon, USA, in 2000 and 2002

Creator:: Auth, Toby D. and Brodeur, Richard D.
Abstract:: The species composition, distribution and concentration of ichthyoplankton off the central Oregon coast in the NE Pacific Ocean were examined during 2000 and 2002 to investigate annual, seasonal, vertical, and cross-shelf variability. Larval concentrations were also analyzed in relation to water temperature and salinity. The 281 samples collected from 5...
Resource Type:: Article
Full Text:: of Oregon, USA, in 2000 and 2002 Toby D. Auth1,*, Richard D. Brodeur2 1Cooperative Institute for

Increases in jellyfish biomass in the Bering Sea: implications for the ecosystem

Creator:: Brodeur, Richard D., Sugisaki, Hiroya, and Hunt Jr., George L.
Abstract:: There has been a dramatic increase in jellyfish biomass over the eastern Bering Sea shelf since the early 1990s, which was previously hypothesized to have been triggered by changing climate and ocean conditions. We examine the hypothesis that the presence of these large carnivores has affected fisheries resources, either through...
Resource Type:: Article
Full Text:: @noaa.gov Increases in jellyfish biomass in the Bering Sea: implications for the ecosystem Richard D

Spatial overlap between forage fishes and the large medusa Chrysaora fuscescens in the northern California Current region

Creator:: Brodeur, Richard D., Barceló, Caren, Robinson, Kelly L., Daly, Elizabeth A., and Ruzicka, James J.
Abstract:: As in many regions of the world, the shelf waters of the western United States have experienced large increases and high interannual variability in jellyfish populations in recent decades. The northern California Current (NCC) is a productive upwelling zone that is home to large populations of medusae, particularly during some...
Resource Type:: Article
Full Text:: California Current region Richard D. Brodeur1,*, Caren Barceló2, Kelly L. Robinson3, Elizabeth A. Daly4

Prey dominance shapes trophic structure of the northern California Current pelagic food web: evidence from stable isotopes and diet analysis

Creator:: Miller, Todd W., Brodeur, Richard D., Rau, Greg, and Omori, Koji
Abstract:: Eastern boundary current (EBC) upwelling zones are among the most productive of marine ecosystems globally and have been generalized in terms of their food web structure. Little empirically based evidence exists to suggest that there is any one form of trophic control of EBC systems and, because of logistical constraints,...
Resource Type:: Article
Full Text:: diet analysis Todd W. Miller1,*, Richard D. Brodeur2, Greg Rau3, Koji Omori1 1Center for Marine

Winter ichthyoplankton biomass as a predictor of early summer prey fields and survival of juvenile salmon in the northern California Current

Creator:: Daly, Elizabeth A., Auth, Toby D., Brodeur, Richard D., and Peterson, William T.
Abstract:: Diets of juvenile coho Oncorhynchus kisutch and Chinook O. tshawytscha salmon are made up primarily of winter-spawning fish taxa in the late-larval and early juvenile stages that are undersampled in plankton and larger trawl nets. Although we have no direct measure of the availability of fish prey important to juvenile...
Resource Type:: Article
Full Text:: northern California Current Elizabeth A. Daly1,*, Toby D. Auth2, Richard D. Brodeur3, William T. Peterson3

Columbia River plume fronts. II. Distribution, abundance, and feeding ecology of juvenile salmon

Creator:: De Robertis, Alex, Morgan, Cheryl A., Schabetsberger, Robert A., Zabel, Richard W., Brodeur, Richard D., Emmett, Robert L., Knight, Carolyn M., Krutzikowsky, Gregory K., and Casillas, Edmundo
Abstract:: Well-defined fronts develop at the seaward edge of riverine plumes where suspended materials and planktonic organisms are concentrated by convergent water flows. Riverine plume fronts have been hypothesized to be favorable fish habitats because they can lead to localized prey aggregations. We examined the spatial distribution of juvenile Pacific salmonids...
Resource Type:: Article
Full Text:: , Robert A. Schabetsberger2,3, Richard W. Zabel4, Richard D. Brodeur1, Robert L. Emmett1, Carolyn M

Species composition and community structure of pelagic nekton off Oregon and Washington under variable oceanographic conditions

Creator:: Brodeur, Richard D., Fisher, Joseph P., Emmett, Robert L., Morgan, Cheryl A., and Casillas, Ed
Abstract:: Dramatic changes in the physical and biological conditions off Washington and Oregon, USA, have occurred since 1998, including extreme El Niño (warm) and La Niña (cool) years, high and low Columbia River flow years, a major intrusion of subarctic water, and a low oxygen event on the shelf. The occurrence...
Resource Type:: Article
Full Text:: Richard D. Brodeur1,*, Joseph P. Fisher2, Robert L. Emmett1, Cheryl A. Morgan3, Ed Casillas4 1Northwest

Abundance, distribution, and feeding ecology of Pyrosoma atlanticum in the Northern California Current

Creator:: Schram, Julie B., Sorensen, Hilarie L., Brodeur, Richard D., Galloway, Aaron W. E., and Sutherland, Kelly R.
Abstract:: During 2016-2018, unprecedented aggregations of the colonial pelagic tunicate Pyrosoma atlanticum were observed in the Northern California Current (NCC). Pyrosomes are common in tropical and sub-tropical ocean waters, but little is known about their abundance, distribution, and trophic ecology in mid-latitude systems. To assess these factors, pyrosomes were collected during...
Resource Type:: Article

Stable isotope values delineate the non-breeding distributions of sooty shearwaters Puffinus griseus in the North Pacific Ocean

Creator:: Thompson, David R., Torres, Leigh G., Taylor, Graeme A., Rayner, Matt J., Sagar, Paul M., Shaffer, Scott A., Phillips, Richard A., and Bury, Sarah J.
Abstract:: Following breeding, sooty shearwaters Puffinus griseus leave New Zealand waters and migrate to 1 of 3 distinct areas in the North Pacific Ocean, effectively exploiting environmental resources across a large proportion of this northern ocean basin. In this study, we combined electronic tracking technology with stable isotope analyses (δ¹⁵N and...
Resource Type:: Article
Full Text:: M. Sagar5, Scott A. Shaffer6, Richard A. Phillips7, Sarah J. Bury1 1National Institute of Water and

Mussel selectivity for high-quality food drives carbon inputs into open-coast intertidal ecosystems

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:: the δ13C of terrestrial material (−24.7 to −31.3‰; Richard et al. 1997, Maksymowska et al. 2000

ScholarsArchive@OSU

Distribution and community structure of ichthyoplankton off the coast of Oregon, USA, in 2000 and 2002

Increases in jellyfish biomass in the Bering Sea: implications for the ecosystem

Spatial overlap between forage fishes and the large medusa Chrysaora fuscescens in the northern California Current region

Prey dominance shapes trophic structure of the northern California Current pelagic food web: evidence from stable isotopes and diet analysis

Winter ichthyoplankton biomass as a predictor of early summer prey fields and survival of juvenile salmon in the northern California Current

Columbia River plume fronts. II. Distribution, abundance, and feeding ecology of juvenile salmon

Species composition and community structure of pelagic nekton off Oregon and Washington under variable oceanographic conditions

Abundance, distribution, and feeding ecology of Pyrosoma atlanticum in the Northern California Current

Stable isotope values delineate the non-breeding distributions of sooty shearwaters Puffinus griseus in the North Pacific Ocean

Mussel selectivity for high-quality food drives carbon inputs into open-coast intertidal ecosystems

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