Index Catalog // ScholarsArchive@OSU

Calanoid copepod diet in an upwelling system : phagotrophic protists vs. phytoplankton

Creator:: Fessenden, Lynne M.
Abstract:: Calanoid copepod diet was investigated in Oregon coastal waters to determine the trophic significance of phagotrophic protists as copepod prey within an ecosystem where the microplankton biomass is typically dominated by large diatoms. Prior to and during the 1991 upwelling season, clearance rates on phytoplankton and phagotrophic ciliates were measured...
Resource Type:: Dissertation
Full Text:: OF AUTHORS Dr. Timothy J. Cowles, serving as academic advisor, aided in interpretation of data and

Ecological interrelationships between summer resident gray whales (Eschrichtius robustus) and their prey, mysid shrimp (Holmesimysis sculpta and Neomysis rayi) along the central Oregon coast

Creator:: Newell, Carrie
Abstract:: The ecological interaction between the largest coastal predator, the gray whale (Eschrichtius robustus) and the most abundant shallow water marcrozooplanktonic prey, mysids, were examined in a poorly-understood predator-prey relationship along the central Oregon coast. From 2002-2008, 83 seasonal gray whales were identified. These whales returned each year around Memorial Day...
Resource Type:: Masters Thesis
Full Text:: Oregon Coast Abstract approved: _________________________________ Timothy J. Cowles The

Phytoplankton fluorescence and survival below the euphotic zone in the California current system

Creator:: Murphy, Alice M.
Resource Type:: Masters Thesis
Full Text:: . Murphy and Timothy J. Cowles College of Oceanic and Atmospheric Sciences Oregon State University

The spectral backscattering properties of marine particles

Creator:: Whitmire, Amanda L.
Abstract:: The inherent and apparent optical properties of different ocean regimes are the basis for all optical remote sensing of the ocean. Ecological information derived from remote sensors therefore relies on having a detailed understanding of how particulate backscattering and absorption contribute to the bulk optical signal. The absorption characteristics of...
Resource Type:: Dissertation
Full Text:: approved: Timothy J. Cowles The inherent and apparent optical properties of different ocean

Relationships of in situ spectral absorption, pigment ratios and environmental parameters for phytoplankton assemblages in coastal waters

Creator:: Eisner, Lisa B.
Abstract:: In situ optical measurements of spectral absorption and beam attenuation provide information on the fine scale horizontal and vertical variations in phytoplankton pigments and other measures of phytoplankton photophysiology and ecology in coastal waters. Phytoplankton pigment ratios from discrete sample analyses with High Performance Liquid Chromatography were compared to in...
Resource Type:: Dissertation
Full Text:: : Timothy J. Cowles In situ optical measurements of spectral absorption and beam attenuation provide

Spatial structure of the physical and biological distributions across the Antarctic Polar Front in austral spring and summer

Creator:: Howard, Cidney
Abstract:: Mesoscale surveys to examine the relationship between the physical processes and biological response along the Antarctic Polar Front (PF) were conducted as part of the US JGOFS Southern Ocean Program during austral spring and summer 1997/98. Multiple crossings of the PF near 170° W, using a towed undulating instrument, provided...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: y J. Cowles Mesoscale surveys to examine the relationship between the physical

Comparing the hydrography and copepod community structure of the continental shelf ecosystems of Washington and Oregon, USA from 1998 to 2009 : can a single transect serve as an index of ocean conditions over a broader area?

Creator:: Lamb, Jesse F.
Abstract:: Bi-weekly sampling of zooplankton and environmental parameters was conducted along a cross-shelf transect off the coast of Newport, OR, USA (44.65°N) from 1996 to present. Results have demonstrated the feasibility of using copepod community structure as an early indicator of ecosystem response to seasonal and large scale environmental changes in...
Resource Type:: Masters Thesis
Full Text:: a Broader Area? Abstract approved: Timothy J. Cowles

The inherent optical properties of the oceans: from closure to prediction

Creator:: Barnard, Andrew Heath
Abstract:: Precise in situ measurement of the spectral absorption and scattering coefficients in several regions has revealed patterns in the distribution of the inherent optical properties on spatial scales that were previously unobtainable. The precision of the measurements was found to be consistent and unbiased across a variety of oceanic regimes...
Resource Type:: Dissertation
Full Text:: Optical Properties of the Oceans: from Closure to Prediction. Abstract approved: Timothy J. Cowles

Variability in mesoscale circulation and its effects on zooplankton distribution in the Northern California Current

Creator:: Keister, Julie Eileen
Abstract:: In eastern boundary current upwelling ecosystems, mesoscale circulation features such as eddies and upwelling filaments play a prominent role in the transfer of water and the associated plankton from the productive nearshore to the oligotrophic deep sea. The relationship between mesoscale circulation, zooplankton distributions, and the across-shelf transport of coastal...
Resource Type:: Dissertation
Full Text:: : ____________________________________________________ Timothy J. Cowles, William T. Peterson In eastern

The effects of physical parameters on the absorption coefficient of natural waters

Creator:: Pegau, W. Scott
Resource Type:: Dissertation
Full Text:: members of my committee, Dr. Timothy Cowles, Dr. Barry Sherr, and Dr. Robert Olson, their time and effort

Bio-physical interactions of small pelagic fish schools and zooplankton prey in the California Current System over multiple scales

Creator:: Kaltenberg, Amanda May
Abstract:: Small pelagic fish represent a critical trophic link between plankton and large predators in marine upwelling ecosystems such as the California Current System. Populations of these fish are highly variable over time and are characterized by extreme fluctuations in abundance, which have significant ecosystem impacts. The causes driving this instability...
Resource Type:: Dissertation
Full Text:: , Tim Cowles, Kipp Shearman, Lorenzo Ciannelli, and Peter Bottomley. Each one has provided unique

The Costa Rica Dome : a study of physics, zooplankton and blue whales

Creator:: Matteson, Robyn S.
Abstract:: At the Costa Rica Dome (CRD), upwelling associated with cyclonic circulation and the presence of a shallow thermocline support a highly productive biological habitat, exploited by marine fauna at several trophic levels. During January 2008, a cruise to the CRD by the R/V Pacific Storm was conducted to relocate blue...
Resource Type:: Masters Thesis
Full Text:: the members of my thesis committee: Bruce R. Mate, Kelly J. Benoit-Bird, Timothy Cowles and Staci

Edge gradients provide evidence of ecological interactions in planktonic thin layers

Creator:: Benoit-Bird, Kelly J., Cowles, Timothy J., and Wingard, Christopher E.
Abstract:: Physical, optical, and acoustical data from Monterey Bay, California, USA, describing the distributions of phytoplankton, zooplankton, and small fish as well as gradients in the physical habitat were used to examine the interactions between vertically compressed plankton structures (thin layers), their consumers, and the local physical forces they experience. The...
Resource Type:: Article
Full Text:: Benoit-Bird, Kelly J., Timothy J. Cowles, and Christopher E

Vertical distribution patterns of plankton and their relationship to physical factors over the continental shelf off Oregon

Creator:: Sutor, Malinda
Abstract:: Discrete layers of phytoplankton and zooplankton were observed over the Oregon continental shelf in summer and fall of 2001 and summer 2002 using optical and acoustical technologies and a pump sampling system. Layers of phytoplankton had steep vertical gradients which were associated with gradients in density and local peaks in...
Resource Type:: Dissertation
Full Text:: approved: T mot1T J. Cowles Discrete layers of phytoplankton and zooplankton were observed over the

Acoustic doppler current profiler observations during the JGOFS AESOPS Antarctic polar front surveys I and II : R/V Revelle cruises from 20-Oct to 23-Nov 1997 and 9-Jan to 7-Feb 1998

Creator:: Pierce, Stephen D., Barth, John A., and Cowles, Timothy J.
Abstract:: We present velocity observations from a shipboard acoustic Doppler current profiler (ADCP) on RJV Revelle during cruises R9710 (20 October to 23 November 1997) and R9801 (9 January to 7 February 1998). The cruises were conducted as part of the Southern Ocean JGOFS (Joint Global Ocean Flux) Antarctic Polar Frontal...
Resource Type:: Technical Report
Full Text:: 1998 by S. D. Pierce, J. A. Barth, and T. J. Cowles College of Oceanic & Atmospheric Sciences

Acoustic doppler current profiler observations during the JGOFS AESOPS Antarctic polar front process studies I and II : R/V Revelle cruises from 30-Nov-97 to 3-Jan-98 and 13-Feb-98 to 19-Mar-98

Creator:: Pierce, Stephen D., Barth, John A., and Cowles, Timothy J.
Abstract:: We present velocity observations from a shipboard acoustic Doppler current profiler (ADCP) on RIV Revelle during cruises R9711 (30 November 1997 to 3 January 1998) and R9802 (13 February 1998 to 19 March 1998). The cruises were conducted as part of the Southern Ocean JGOFS (Joint Global Ocean Flux) Antarctic...
Resource Type:: Technical Report

Silicon biogeochemistry in the open-ocean surface waters : insights from the Sargasso Sea and equatorial Pacific

Creator:: Krause, Jeffrey W.
Abstract:: Diatoms are a ubiquitous group of plankton responsible for 20-40% of oceanic primary production, and a higher fraction of organic matter export to the ocean interior. Diatoms actively transport dissolved inorganic silicon into their cells, and through the process of silicification (i.e. biogenic silica production) they build tough and intricate...
Resource Type:: Dissertation

Seconds to hour scale photosynthetic responses in marine microalgae

Creator:: Laney, Samuel R.
Abstract:: Our view of phytoplankton has historically revolved around their inability to control their location in space. The term phytoplankton itself underscores this particular difference between phytoplankton and their sessile terrestrial counterparts. Yet there are other differences between land plants and the phytoplankton that are perhaps equally important, beyond this sessile-planktonic...
Resource Type:: Dissertation
Full Text:: : Pat Wheeler, Ron Zaneveld, and Tim Cowles from COAS, Tom Plant from Electrical Engineering and

Distribution and variability of iron input to Oregon coastal waters during the upwelling season

Creator:: Chase, Zanna, Hales, Burke, Cowles, Timothy J., Schwartz, Roseanne, and van Geen, Alexander
Abstract:: We measured iron concentrations off the Oregon coast in spring (May–June) and summer (August) of 2001 as part of the Coastal Ocean Advances in Shelf Transport (COAST) program. Dissolvable and total dissolvable iron levels in surface waters were generally higher in spring (mean of 2.1 and 33.9 nmol L¯¹, respectively)...
Resource Type:: Article
Full Text:: Oregon coastal waters during the upwelling season Zanna Chase, Burke Hales, and Timothy Cowles College

Spectral backscattering properties of marine phytoplankton cultures

Creator:: Whitmire, Amanda L., Pegau, W. Scott, Karp-Boss, Lee, Boss, Emmanuel, and Cowles, Timothy J.
Abstract:: The backscattering properties of marine phytoplankton, which are assumed to vary widely with differences in size, shape, morphology and internal structure, have been directly measured in the laboratory on a very limited basis. This work presents results from laboratory analysis of the backscattering properties of thirteen phytoplankton species from five...
Resource Type:: Article
Full Text:: and Timothy J. Cowles 1 1Oregon State University, College of Oceanic & Atmospheric Sciences, 104

SeaSoar observations during the GLOBEC NEP California Current survey III (T0205) : 31 May - 17 June 2002

Creator:: O'Malley, Robert T., Cowles, Timothy J., Barth, John A., and Global Ocean Ecosystems Dynamics (Program)
Resource Type:: Technical Report

Tidally Forced Internal Waves and Overturns Observed on a Slope: Results from HOME

Creator:: Levine, Murray D. and Boyd, Timothy John, 1958-2013
Abstract:: Tidal mixing over a slope was explored using moored time series observations on Kaena Ridge extending northwest from Oahu, Hawaii, during the Survey component of the Hawaii Ocean Mixing Experiment (HOME). A mooring was instrumented to sample the velocity and density field of the lower 500 m of the water...
Resource Type:: Article
Full Text:: : Results from HOME MURRAY D. LEVINE AND TIMOTHY J. BOYD College of Oceanic and Atmospheric Sciences

Defining the word "Seamount"

Creator:: Staudigel, Hubert, Koppers, Anthony A. P., Lavelle, J. William, Pitcher, Tony J., and Shank, Timothy M.
Abstract:: Reading through this issue of Oceanography, it will become apparent that researchers in different disciplines see their seamounts in quite different ways. The term seamount has been defined many times (e.g., Menard, 1964; Wessel, 2001; Schmidt and Schmincke, 2000; Pitcher et al., 2007; International Hydrographic Organization, 2008; Wessel et al.,...
Resource Type:: Article
Full Text:: | Defining the Word “Seamount” By Hubert Staudigel, Anthony A.P. Koppers, J. William Lavelle, Tony J. Pitcher

Submarine-based hydrographic observations of the Arctic Ocean, March-May 1995 : SCICEX-95

Creator:: Boyd, Timothy John, 1958-2013, Moustafa, Mary Sue, and Steele, Michael
Abstract:: This report documents observations of temperature and salinity made in the Arctic Ocean during the 1995 cruise of the submarine USS Cavalla. This cruise was the second civilian scientific cruise to the Arctic Ocean aboard a U.S. Navy Sturgeon-class submarine, and the first of five annual SCICEX cruises. The SCICEX-95...
Resource Type:: Technical Report
Full Text:: Hydrographic Observations of the Arctic Ocean March-May 1995 SCICEX-95 Timothy Boyd Mary Sue Moustafa

Measurement of Directional Wave Spectra Using Aircraft Laser Altimeters

Creator:: Sun, J., Burns, S. P., Vandemark, D., Donelan, M. A., Mahrt, L., Crawford, Timothy L., Herbers, T. H. C., Crescenti, G. H., and French, J. R.
Abstract:: A remote sensing method to measure directional oceanic surface waves by three laser altimeters on the NOAA LongEZ aircraft is investigated. To examine feasibility and sensitivity of the wavelet analysis method to various waves, aircraft motions, and aircraft flight directions relative to wave propagation directions, idealized surface waves are simulated...
Resource Type:: Article
Full Text:: Altimeters J. SUN,* S. P. BURNS,* D. VANDEMARK,� M. A. DONELAN,# L. MAHRT,@ TIMOTHY L. CRAWFORD,&,@@ T. H

Mooring observations from the Hawaiian ridge : November 2000 - January 2002 : a component of the Hawaii Ocean Mixing Experiment (HOME) Survey Program

Creator:: Boyd, Timothy John, 1958-2013, Levine, Murray D., Gard, Steve R., and Waldorf, Walt
Abstract:: This report documents the observations of velocity, temperature and conductivity made from two moorings deployed in the Kauai Channel on the ridge extending NW from Oahu, Hawaii. The moorings were deployed in November 2000 for two months as part of the Hawaii Ocean Mixing Experiment (HOME) Survey Program.
Resource Type:: Technical Report
Full Text:: of the Hawaii Ocean Mixing Experiment (HOME) Survey Program by Timothy Boyd Murray D. Levine Steve

Mooring observations from the Oregon continental shelf : April-September 1999 : a component of the prediction of wind-driven coastal circulation project

Creator:: Boyd, Timothy John, 1958-2013, Levine, Murray D., Kosro, P. Michael, and Gard, Steve R.
Abstract:: This report documents oceanographic and meteorological measurements made from instruments deployed on four moorings over the continental shelf west of Oregon, from spring through summer, 1999. These moorings were a component of an observational and numerical modeling program to study the response of the coastal ocean to wind forcing. The...
Resource Type:: Technical Report
Full Text:: Coastal Circulation Project by Timothy Boyd Murray D. Levine P. Michael Kosro Steve R. Gard lege of

Horizontal and vertical distribution of juvenile pollock (Theragra chalcogramma) in the southeastern Bering Sea

Creator:: McIntosh, Neal E.
Abstract:: Juvenile walleye pollock (Theragra chalcogramma) are one of the primary prey items for bird and mammal predators in the Bering Sea and support a large commercial fishery. An understanding of the environmental factors that determine the horizontal and vertical distribution of juvenile pollock is needed to estimate the effects that...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Kelly J. Benoit‐Bird Juvenile walleye pollock (Theragra chalcogramma) are one of the

Decomposition of absorption coefficients and decorrelation lengthscales of hydrographic and inherent optical properties in the Middle Atlantic Bight

Creator:: Simeon, Jennifer J.
Abstract:: This investigation is an exploration of the use of inherent optical properties towards further elucidation of coastal circulation processes occurring on the continental shelf and slope in the Middle Atlantic Bight, south of Cape Cod Massachusetts, during 14-Aug to 1-Sep 1996 and 25-Apr to 15-May 1997. Assessing the possibility of...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Jennifer J. Simeon for the degree

Seasonal renewal of the California Current: The spring transition off California

Creator:: Lynn, Ronald J., Bograd, Steven J., Chereskin, Teresa K., and Huyer, Adriana, 1945-
Abstract:: A pair of high-resolution oceanographic surveys in March and April 1995 revealed a large and rapid transition from late winter to spring conditions in the coastal zone off central and southern California. These data are unique in capturing the detailed three-dimensional physical structure of and biological response to the spring...
Resource Type:: Article
Full Text:: . M. Kosro, J. Fleischbein, S. R. Ramp, T. Stanton, L. Washburn, F. P. Chavez, T. Cowles, S. D. Pierce

Satellite Estimates and Shipboard Observations of Downward Radiative Fluxes at the Ocean Surface

Creator:: Guo, G. and Coakley, J. A., Jr.
Abstract:: Clouds and the Earth’s Radiant Energy System (CERES) uses a suite of instruments on the Terra and Aqua satellites combined with analyzed weather data and information on surface conditions to estimate surface radiative fluxes. CERES estimates for the Terra satellite were compared with measurements of the surface radiative fluxes collected...
Resource Type:: Article
Full Text:: Radiative Fluxes at the Ocean Surface G. GUO* AND J. A. COAKLEY JR. College of Oceanic and Atmospheric

Active acoustic examination of the diving behavior of murres foraging on patchy prey

Creator:: Benoit-Bird, Kelly J., Kuletz, Kathy, Heppell, Scott, Jones, Nathan, and Hoover, Brian
Abstract:: During the 2008 and 2009 breeding seasons of murres Uria spp., we combined visual observations of these predators with active acoustics (sonar), fish trawls, zooplankton net tows, and hydrographic measurements in the area surrounding breeding colonies in the southeastern Bering Sea. We acoustically detected thousands of bubble trails that were...
Resource Type:: Article
Full Text:: murres foraging on patchy prey Kelly J. Benoit-Bird1,*, Kathy Kuletz2, Scott Heppell3, Nathan Jones4

Optical scattering and backscattering by organic and inorganic particulates in U.S. coastal waters

Creator:: Snyder, William A., Arnone, Robert A., Davis, Curtiss O., Goode, Wesley, Gould, Richard W., Ladner, Sherwin, Lamela, Gia, Rhea, William J., Stavn, Robert, Sydor, Michael, and Weidemann, Allen
Abstract:: We present the results of a study of optical scattering and backscattering of particulates for three coastal sites that represent a wide range of optical properties that are found in U.S. near-shore waters. The 6000 scattering and backscattering spectra collected for this study can be well approximated by a power-law...
Resource Type:: Article
Full Text:: Wesley Goode,2 Richard W. Gould,2 Sherwin Ladner,2 Gia Lamela,1 William J. Rhea,1 Robert Stavn,4 Michael

The large-scale summer circulation of the California Current

Creator:: Strub, P. Ted and James, Corinne
Abstract:: Satellite data from the Geosat altimeter and the Advanced Very High Resolution Radiometer (AVHRR) are used to show the large-scale structure of the surface circulation of the California Current System in summer. These data show the connection between an equatorward jet and temperature front off Oregon that lies within 100...
Resource Type:: Article
Full Text:: . Cowles, The Coastal Transition Zone Pro- gram, J. Geophys. Res., 96, 14,637-14,647, 1991. Brink, K.H

Light driven seasonal patterns of chlorophyll and nitrate in the lower euphotic zone of the North Pacific Subtropical Gyre

Creator:: Letelier, Ricardo M., Karl, David M., Abbott, Mark R., and Bidigare, Robert R.
Abstract:: The euphotic zone below the deep chlorophyll maximum layer (DCML) at Station ALOHA (a long-term oligotrophic habitat assessment; 22º45′N, 158º00′W) transects the nearly permanently stratified upper thermocline. Hence, seasonal changes in solar radiation control the balance between photosynthesis and respiration in this lightlimited region. Combining profiles of radiance reflectance, algal...
Resource Type:: Article
Full Text:: and proper interpretation of the physical data. Timothy Cowles, Jasmine Nahorniak, Pilar Bañ- ados

Physical and chemical factors controlling the distribution of the major phytoplankton classes at the Antarctic Polar Front, 170 °W

Creator:: Mengelt, Claudia
Abstract:: This study was part of the Antarctic Environment and Southern Ocean Study (AESOPS) program, whose main goal was to investigate the role of the biota in the carbon flux from the atmosphere to the interior of the ocean. We quantified the abundance of the major phytoplankton classes and examined the...
Resource Type:: Masters Thesis
Full Text:: essential to this work: M. Sparrow, F. Prahl, C. Vendetta, L. Eisner, S. Laney and J. Barth

Scales of variability of bio-optical properties as observed from near-surface drifters

Creator:: Abbott, Mark R., Brink, Kenneth H., Booth, C. R., Blasco, Dolors, Swenson, Mark S., Davis, Curtiss O., and Codispoti, L. A.
Abstract:: A drifter equipped with bio-optical sensors and an automated water sampler was deployed in the California Current as part of the coastal transition zone program to study the biological, chemical, and physical dynamics of the meandering filaments. During deployments in 1987 and 1988, measurements were made of fluorescence, downwelling irradiance,...
Resource Type:: Article
Full Text:: of these meanders or filaments [Brink and Cowles, 1991]. Using an array of bio-optical sensors and

SeaSoar observations during the Coastal Ocean Advances in Shelf Transport (COAST) mesoscale survey II : R/V Wecoma cruise from 6 to 26 August 2001

Creator:: O'Malley, Robert T., Barth, John A., and Erofeev, Anatoli Y.
Abstract:: As part of the Coastal Ocean Processes (CoOP) project Coastal Ocean Advances in Shelf Transport (COAST), this was the second of two cruises in 2001 to study cross-shelf transport processes in a wind-driven coastal ocean. The project includes field experiments off the Oregon coast and coordinated ocean circulation/ecosystem and atmospheric...
Resource Type:: Technical Report
Full Text:: SeaSoar Zanna Chase (MBARI) Scientist iron Timothy Cowles* Co-Chief Scientist bio-optics/chlorophyll

Equatorward jets and poleward undercurrents along the eastern boundary of the mid-latitude north Pacific

Creator:: Pierce, Stephen D.
Abstract:: We sharpen our view of an eastern boundary current region during the upwelling season through the analysis of several data sets. We focus on the mesoscale flow field off of northern California, observed during the Coastal Transition Zone (CTZ) experiment of 1988. First, we estimate tidal currents in the region...
Resource Type:: Dissertation
Full Text:: eddy formation: ship, air and satellite results.Science, 195, 353-359. Brink, K. H. and T. J. Cowles

Dynamics of mesoscale motion in the California current

Creator:: Shearman, R. Kipp
Resource Type:: Dissertation
Full Text:: colleague. For this, I am grateful. I thank Drs. Tim Cowles and Bob Haney, who have enthusiastically

Physical-biological interactions in the Southern Ocean

Creator:: Moore, Jefferson Keith
Abstract:: Physical-biological interactions in the Southern Ocean were investigated using remote sensing data from several different satellite sensors. Satellite sea surface temperature data were used to study the dynamics of the Antarctic Polar Front (PF). Satellite ocean color data were used to estimate surface chlorophyll concentrations and their relation to various...
Resource Type:: Dissertation
Full Text:: the research and writing of Chapter 7. Walker Smith, Timothy Cowles, Kenneth Coale, Wilford Gardner

Dive and surfacing behavior of bowhead whales (Balaena mysticetus) monitored by satellite-telemetry

Creator:: Krutzikowsky, Gregory K.
Resource Type:: Masters Thesis
Full Text:: whales. ' Otbo)X n.( C'' ., $..J duration bin (mm) 25 -s 20 w15 t10 ci) > Co 25 11: Tag D/Z-1

Bioenergetics individual based model explorations of juvenile coho salmon growth during their first summer on the Oregon shelf

Creator:: Reser, Brendan Alexander
Abstract:: Salmon survival and eventual recruitment success have long been thought to be determined within the first summer following ocean migration. Juvenile growth during this period is largely influenced by ocean conditions such as temperature, prey availability, abundance, and quality. Shifts in these conditions due to climatic perturbations are particularly prevalent...
Resource Type:: Masters Thesis
Full Text:: Nehalem, Salmon River, Rock Creek, Bandon, Cole Rivers and Butte Falls (J. Fisher, personal

Distribution, structure, and function of marine ecological communities in the northern California Current upwelling ecosystem

Creator:: Reese, Douglas Charles
Abstract:: Within systems characterized by substantial spatial and temporal variability, abundances of organisms tend to be higher in localized areas. Within the northern California Current system, the identification of such marine, biological hotspots would be of great importance to resource managers, conservationists, and research planners, and is consequently a growing area...
Resource Type:: Dissertation
Full Text:: . APPROVED: Major Professor, representing Oceanography ~J~ Dean of the College of Oceanic and

Production and partitioning of organic matter during simulated phytoplankton blooms

Creator:: Wetz, Michael S.
Abstract:: Few studies have examined the partitioning of organic matter in upwelling systems, despite the fact that these systems play a key role in carbon and nitrogen budgets in the ocean. We examined the production and partitioning of phytoplankton-derived organic matter in deck incubations off Oregon during the upwelling season. During...
Resource Type:: Masters Thesis
Full Text:: discusses several aspects of this study that necessitate future work. a, V a, -J 0= sampling site

Seasonal variation of male-type antennular setation in female Calanus finmarchicus

Creator:: Miller, Charles B., Crain, Jennifer A., and Marcus, Nancy H.
Abstract:: Female calanoid copepods of the family Calanidae can mature with either the juvenile and most typical female pattern of setation, termed trithek (T), or with the male pattern, termed quadrithek (Q). It was suggested by Fleminger (1985), but not proved, that females with the Q pattern have switched from development...
Resource Type:: Article
Full Text:: - 224 2.3 2.4 2.5 2.6 2.7 2.8 2.9 D J F M A M J J A Month, 1995 P ro so m e Le ng th , m m

Sea-air CO₂ flux variability on the northeast Pacific continental margin

Creator:: Evans, Wiley
Abstract:: Carbon dioxide (CO₂) fluxes between the ocean and atmosphere on continental margins are difficult to diagnose because these regions experience large variability over spatial and temporal scales spanning meters to basins and hours to years, respectively. In a global sense, continental margins could represent a significant atmospheric CO₂ sink, equivalent...
Resource Type:: Dissertation

Two coastal upwelling domains in the northern California Current system

Creator:: Huyer, Adriana, 1945-, Fleischbein, Jane, Keister, Julie Eileen, Kosro, P. Michael, 1951-, Perlin, Natalie, Smith, Robert L. (Robert Lloyd), 1935-, and Wheeler, Patricia A.
Abstract:: A pair of hydrographic sections, one north and one south of Cape Blanco at 42.9N, was sampled in five summers (1998–2000 and 2002–2003). The NH line at 44.6N lies about 130 km south of the Columbia River, and spans a relatively wide shelf off Newport, Oregon. The CR line at...
Resource Type:: Article
Full Text:: geopotential anomaly between the sea surface and a reference isobar; a steric height anomaly of 1.0 J kg�1

Riverine input of macronutrients, iron, and organic matter to the coastal ocean off Oregon, U.S.A., during the winter

Creator:: Wetz, Michael S., Hales, Burke, Chase, Zanna, Wheeler, Patricia A., and Whitney, Michael M.
Abstract:: Three cross‐shelf transects were conducted off northern Oregon in February, 2003, coincident with flooding of Coast Range rivers, to assess the riverine impact on coastal ocean biogeochemistry. During downwelling conditions, low salinity river‐influenced water was located in a narrow band near the coast and contained elevated macronutrient, iron, and organic...
Resource Type:: Article
Full Text:: , Oregon. Estuar. Coastal Shelf Sci. 15: 561–567. CHASE, Z., B. HALES, T. J. COWLES, R. SCHWARTZ, AND A

Response of bacteria to simulated upwelling phytoplankton blooms

Creator:: Wetz, Michael S. and Wheeler, Patricia A.
Abstract:: Until recently, studies of the fate of primary production in coastal upwelling systems have focused mainly on export through sinking of particulate organic matter (POM). In week-long deck incubations conducted during the upwelling season off Oregon, a large accumulation of carbonrich (C:N ≥ 16) dissolved organic matter (DOM) occurred following...
Resource Type:: Article
Full Text:: NSF grants OCE-9907854 and OCE- 0000733 to P.A.W. LITERATURE CITED Álvarez-Salgado XA, Gago J

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