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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:: anonymous reviewers for their constructive critiques of this manuscript. This research was supported by a

Cold halocline, increased nutrients and higher chlorophyll off Oregon in 2002

Creator:: Wheeler, Patricia A., Huyer, Adriana, 1945-, and Fleischbein, Jane
Abstract:: Observed changes in the nutrient levels in the halocline of the California Current during 2002 indicated a natural eutrophication that was accompanied by increased chlorophyll and oxygen in surface water. Decreased oxygen in the lower water column over the shelf indicated that much of the phytoplankton production was respired rather...
Resource Type:: Article
Full Text:: chlorophyll off Oregon in 2002 Patricia A. Wheeler, Adriana Huyer, and Jane Fleischbein College of Oceanic

Release of dissolved organic matter by coastal diatoms

Creator:: Wetz, Michael S. and Wheeler, Patricia A.
Abstract:: Dissolved organic matter (DOM) production was examined in axenic batch cultures of five coastal diatom species. For Chaetoceros decipiens, dissolved organic carbon (DOC) accumulated beginning in late exponential growth as a result of increased cell density. For Cylindrotheca closterium, DOC actually decreased in late exponential growth and reached zero by...
Resource Type:: Article
Full Text:: matter by coastal diatoms Michael S. Wetz1 and Patricia A. Wheeler College of Oceanic and Atmospheric

Rocky intertidal oceanography: an association between community structure and nearshore phytoplankton concentration

Creator:: Menge, Bruce A., Daley, Bryon A., Wheeler, Patricia A., and Strub, P. Ted
Abstract:: On Oregon coastal rocky shores, filter‐feeders were relatively abundant and macrophytes were relatively scarce at Strawberry Hill, whereas opposite abundance patterns occurred at Boiler Bay. To determine whether nearshore oceanographic differences were associated with these patterns, we made shore‐based measurements of nutrient and Chl a concentrations. We used a three‐level...
Resource Type:: Article
Full Text:: College of Oceanography and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 9733 l-291 4

Stoichiometry of C, N, P, and Si fluxes in a temperate-climate embayment

Creator:: Smith, S. V., Wiebe, W. J., Hollibaugh, J. T., Dollar, S. J., Hager, S. W., Cole, B. E., Tribble, G. W., and Wheeler, Patricia A.
Abstract:: Dissolved C, N, P, and Si budgets for Tomales Bay, California, have been used to solve simultaneous stoichiometric equations which describe a plausible material balance for net organic matter reactions in the bay. Dissolved Si and P were both exported hydrographically. Dissolved C and fixed N were imported hydrographically. If...
Resource Type:: Article
Full Text:: Journal of Marine Research, 45, 427-460, 1987 Stoichiometry of C

Methylammonium uptake by Chesapeake Bay phytoplankton: Evaluation of the use of the ammonium analogue for field uptake measurements

Creator:: Wheeler, Patricia A. and McCarthy, James J.
Abstract:: The uptake of methylammonium (MA) by Chesapeake Bay phytoplankton was measured in short term experiments by using the 14C radioisotope. This uptake was inversely related to ambient NH4+ concentrations, and the specificity for uptake of both substrates was demonstrated by competitive inhibition. At stations with low ambient NH4+, MA uptake...
Resource Type:: Article
Full Text:: uptake by Chesapeake Bay phytoplankton: Evaluation of the use of the ammonium analogue for field uptake

Uptake of glycine by natural phytoplankton communities

Creator:: Wheeler, Patricia A., North, B., Littler, M., and Stephens, G.
Abstract:: Uptake of [14C]glycine by various size fractions of natural plankton communities was measured to determine if phytoplankton can compete effectively with other members of the plankton community for the free amino acids in seawater. The simultaneous occurrence of glycine uptake, plant pigments, and photosynthetic activity in the same size fractions,...
Resource Type:: Article
Full Text:: WHEELER, P., B. NORTH, M. LITTLER, AND G. STEPHENS. Uptake of

Benthic-Pelagic Links and Rocky Intertidal Communities: Bottom-Up Effects on Top-Down Control?

Creator:: Menge, Bruce A., Daley, Bryon A., Wheeler, Patricia A., Dahlhoff, Elizabeth, Sanford, Eric, and Strub, P. Ted
Abstract:: Insight into the dependence of benthic communities on biological and physical processes in nearshore pelagic environments, long considered a ``black box,'' has eluded ecologists. In rocky intertidal communities at Oregon coastal sites 80 km apart, differences in abundance of sessile invertebrates, herbivores, carnivores, and macrophytes in the low zone were...
Resource Type:: Article
Full Text:: *¶, ERIC SANFORD*, AND P. TED STRUB§ *Department of Zoology and the §College of Oceanography, Oregon State

Nitrogen cycling in the Barents Sea - seasonal dynamics of new and regenerated production in the marginal ice zone

Creator:: Kristiansen, Svein, Farbrot, Tove, and Wheeler, Patricia A.
Abstract:: The uptake rates of nitrate, ammonium, and urea were measured with a ¹⁵N technique during seven cruises in the marginal ice zone (MIZ) in the Barents Sea in 1984–1988. The results from all the cruises were pooled to obtain means for the prebloom, bloom, transition, and postbloom periods. New production—nitrate...
Resource Type:: Article
Full Text:: The Norwegian Research Council for Science and the Humanities (NAVF), The Norwegian Ministry of the

Nitrate uptake rates in a coastal upwelling regime: a comparison of PN-specific, absolute, and Chl a-specific rates

Creator:: Dickson, Mary-Lynn and Wheeler, Patricia A.
Abstract:: PN-specific, absolute, and Chl a-specific nitrate uptake rates were measured during two upwelling seasons and one winter off Oregon. Although PN-specific and absolute uptake rates showed no dependence on nitrate concentration, Michaelis-Menten kinetics applied when the uptake rates were normalized to Chl a. Chl a-specific nitrate uptake rates were saturated...
Resource Type:: Article
Full Text:: Chl a-specific rates Mary-Lynn Dickson’ and Patricia A. Wheeler College of Oceanic and Atmospheric

ScholarsArchive@OSU

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

Cold halocline, increased nutrients and higher chlorophyll off Oregon in 2002

Release of dissolved organic matter by coastal diatoms

Rocky intertidal oceanography: an association between community structure and nearshore phytoplankton concentration

Stoichiometry of C, N, P, and Si fluxes in a temperate-climate embayment

Methylammonium uptake by Chesapeake Bay phytoplankton: Evaluation of the use of the ammonium analogue for field uptake measurements

Uptake of glycine by natural phytoplankton communities

Benthic-Pelagic Links and Rocky Intertidal Communities: Bottom-Up Effects on Top-Down Control?

Nitrogen cycling in the Barents Sea - seasonal dynamics of new and regenerated production in the marginal ice zone

Nitrate uptake rates in a coastal upwelling regime: a comparison of PN-specific, absolute, and Chl a-specific rates

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