In 2013, the California current was dominated by
strong coastal upwelling and high productivity. Indices
of total cumulative upwelling for particular coastal
locations reached some of the highest values on record.
Chlorophyll a levels were high throughout spring and
summer. Catches of upwelling-related fish species were
also high. After a...
Coastal upwelling in the northern California Current
varies seasonally, with downwelling in winter and upwelling
in summer, resulting in pronounced variability in
hydrography, nutrients, phytoplankton biomass, and species
composition. Winter was characterized by moderate concentrations
of nitrate and silicate (averages of 10 and 18 μM,
respectively) and low concentrations of...
Significant seabird mortality on the Oregon (OR) and Washington (WA) coast in 2009 has been attributed to a massive bloom of the dinoflagellate Akashiwo sanguinea (K. Hirasaka) G. Hansen & Ø. Moestrup. Initial, albeit limited, observations suggested this bloom began in WA and reached OR waters through southward transport. Here,...
The community of trophically transmitted marine parasites of juvenile coho (Oncorhynchus kisutch) and Chinook
(Oncorhynchus tshawytscha) salmon across 8 years (2002–2009) was related to indices of physical and biological ocean conditions
and adult returns. When the biomass of lipid-poor, southern origin copepods in the coastal ocean was high during juvenile...
Larval supply determines year-class strength of fisheries and complex ecological
interactions among adults of benthic marine species. In upwelling regions, a latitudinal cline in
the intensity and persistence of upwelling is thought to affect larval advection and recruitment,
thereby regulating the intensity of interactions in adult populations and communities. We...
Fisheries oceanography is the study of ecological relationships between fishes and the dynamics of their marine environments and aims to characterize the physical, chemical, and biological factors that affect the recruitment and abundance of harvested species. A recent push within the fisheries management community is toward ecosystem-based management. Here, we...