Index Catalog // ScholarsArchive@OSU

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:: . Nichols, S. Navarrete, L. Ryan, and M. Willis assisted with field work. We thank the National Science

Creator:: Moore, J. Keith, Abbott, Mark R., Richman, James G., and Nelson, David M.
Abstract:: Analysis of satellite ocean color, sea surface temperature, and sea ice cover data reveals consistent patterns between biological production, iron availability, and physical forcings in the Southern Ocean. The consistency of these patterns, in conjunction with information on physical conditions during the last glacial maximum (LGM), enables estimates of export...
Resource Type:: Article

Creator:: Moore, J. Keith and Abbott, Mark R.
Abstract:: Satellite ocean color data from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) were used to examine distributions of chlorophyll concentration within the Southern Ocean for the period of October 1997 through September 1998. Over most of the Southern Ocean, mean chlorophyll concentrations remained quite low (<0.3-0.4 mg m¯³). Phytoplankton blooms where...
Resource Type:: Article

Creator:: Landry, Michael R., Brown, Susan L., Selph, Karen E., Abbott, Mark R., Letelier, Ricardo M., Christensen, Stephanie, Bidigare, Robert R., and Casciotti, K.
Abstract:: During austral summer 1997, satellite imagery revealed enhanced chlorophyll associated with the Antarctic Polar Front at 170°W. Phytoplankton growth conditions during the early stages of the spring increase were investigated on the Antarctic Environment and Southern Ocean Process Study Survey I cruise using flow cytometry (FCM) and microscopy to characterize...
Resource Type:: Article

Creator:: Wetz, Michael S. and Wheeler, Patricia A.
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:: Article
Full Text:: thank Evelyn Sherr, Ricardo Letelier, Ron Benner, Lee Karp- Boss, Jennifer Jarrell-Wetz, and three

Creator:: Wetz, Michael S., Wheeler, Patricia A., and Letelier, Ricardo M.
Abstract:: Despite the importance of the spring phytoplankton bloom off Oregon as a food source for zooplankton, little is known about the sources of phytoplankton seed stock for the bloom or its timing. Experiments were conducted in the late winter to determine if the benthic boundary layer (BBL) could be a...
Resource Type:: Article
Full Text:: from the benthic boundary layer off Oregon, USA Michael S. Wetz*, Patricia A. Wheeler, Ricardo M

Creator:: Sakamoto, Carole M., Karl, David M., Jannasch, Hans W., Bidigare, Robert R., Letelier, Ricardo M., Walz, Peter M., Ryan, John P., Polito, Paulo S., and Johnson, Kenneth S.
Abstract:: Nitrate concentrations, chlorophyll a (Chl a) fluorescence, radiance, salinity, and temperature were measured on the Hawaii Air-Sea Logging Experiment, A Long-Term Oligotrophic Habitat Assessment (HALE ALOHA) mooring located near the Hawaii Ocean Time-Series (HOT) Program’s Station ALOHA (22°45’N; 158°W). Nitrate concentrations were determined with OsmoAnalyzers deployed at depths of 120...
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Full Text:: . Karl,2 Hans W. Jannasch,1 Robert R. Bidigare,2 Ricardo M. Letelier,3 Peter M. Walz,1 John P. Ryan,1

Creator:: Piola, Alberto R., Matano, Ricardo P., Palma, Elbio D., Moller, Osmar O., and Campos, Edmo J. D.
Abstract:: The influence of the Plata, the second largest river in South America, extends along a coastal strip of 1300 km. Historical hydrographic and wind data and numerical simulations are combined to determine the seasonal and interannual variability of the Plata plume and its relationship to the magnitude of the river...
Resource Type:: Article
Full Text:: the western South Atlantic shelf Alberto R. Piola,1 Ricardo P. Matano,2 Elbio D. Palma,3 Osmar O

Creator:: White, Angelicque E., Spitz, Yvette H., and Letelier, Ricardo M.
Abstract:: We report the development of a numerical model simulating vertical movement of the cyanobacterium Trichodesmium spp. Given a range of physiological parameters derived from the literature, resultant model solutions allow us to explore the ecological significance of vertical migration by Trichodesmium colonies in a stratified oligotrophic oceanic system such as...
Resource Type:: Article
Full Text:: carbohydrate ballasting by Trichodesmium spp. Angelicque E. White*, Yvette H. Spitz, Ricardo M. Letelier

Creator:: Schouten, Mathijs W. and Matano, Ricardo P.
Abstract:: The formation mechanisms and pathways of intermediate water in the Southern Ocean are analyzed from output of a high-resolution ocean general circulation model. Deep winter mixed layer formation in the Southern Ocean is diagnosed from the model results and is found to be mostly consistent with observations. Diapycnal water mass...
Resource Type:: Article
Full Text:: in the Parallel Ocean Circulation Model’s Southern Ocean Mathijs W. Schouten1,2 and Ricardo P

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