Index Catalog // ScholarsArchive@OSU

Background of the birds of Lincoln County project and recommendations for others planning similar projects

Creator:: Bayer, Range D., 1947-
Abstract:: The impetus for this Project began in 1968-1973 with birders at the Marine Science Center (MSC). But in the past 10 or so years the focus has shifted to a county group, Yaquina Birders & Naturalists. 120 individuals or couples have each contributed 100 or more records with 51% of...
Resource Type:: Article
Full Text:: . Bretherton(18,43) * Eric Horvath (#5) * George Brown * Alice Ivey * Sara & Don Brown #Robert Buchanan

Small, aloricate ciliates as a major component of the marine heterotrophic nanoplankton

Creator:: Sherr, Evelyn, Sherr, Barry F., Fallon, Robert D., and Newell, Steven Y.
Abstract:: Small, aloricate ciliates with equivalent spherical cell diameters <20 µm (biovolume <4,000 µm3) compose, on average, 4–57% of the total biomass of heterotrophic (apochlorotic) nanoplankton in diverse marine systems. Biomass production of nanoplanktonic ciliates in a southeastern U.S. estuary was also a significant part of the total production of heterotrophic...
Resource Type:: Article
Full Text:: SHERR, EVELYN B., BARRY F. SHERR, ROBERT D. FALLON, AND STEVEN Y

Molybdenum in the Northeast Pacific Ocean

Creator:: Collier, Robert W.
Abstract:: The concentration of dissolved molybdenum has been determined in several profiles from the Northeast Pacific Ocean. The salinity-normalized concentration is essentially constant in all open-ocean samples (107 nM, lσ = 2.5 nM). The dissolved distribution is not significantly affected by biological cycling.
Resource Type:: Article
Full Text:: COLLIER, ROBERT W. Molybdenum in the Northeast Pacific Ocean

Genetic diversity of the narrow endemic Astragalus oniciformis (Fabaceae)

Creator:: Alexander, J. Andrew, Liston, Aaron, and Popovich, Steve J.
Abstract:: Astragalus oniciformis Barneby is a narrow endemic xerophyte of the upper Snake River Plain of central Idaho, USA, where it inhabits stabilized, aeolian sand deposits and previously burned, sandy sites over Quaternary basalt flows. The objective of this study was to determine the levels and distribution of genetic differentiation within...
Resource Type:: Article
Full Text:: –2012. 2004. GENETIC DIVERSITY OF THE NARROW ENDEMIC ASTRAGALUS ONICIFORMIS (FABACEAE)1 J. ANDREW

Forest soil characteristics in a chronosequence of harvested Douglas-fir forests

Creator:: Griffiths, Robert P. and Swanson, Alan K.
Abstract:: This study was designed to measure the microbiological and chemical characteristics of forest soils in a chronosequence of harvested Douglas-fir (Pseusotsuga menziesii (Mirb.) Franco) stands in different climatic settings. Mineral soil samples were collected along transects running from old-growth (OG) forests into harvested stands of ages 5, 15, and 40...
Resource Type:: Article
Full Text:: harvested Douglas-fir forests1 Robert P. Griffiths and Alan K. Swanson Abstract: This study was designed

Erosion by rivers and transport pathways in the ocean: A provenance tool using 40Ar--39Ar incremental heating on fine-grained sediment

Creator:: VanLaningham, Sam, Duncan, Robert A., and Pisias, Nicklas G.
Abstract:: We use Ar-40-Ar-39 incremental heating to fingerprint bulk fluvial sediment entering the northeast Pacific Ocean, with the long-term intent of tracking sediment source and transport changes from the terrestrial system to the marine environment through time. We show reproducible age spectra from individual rivers accounting for the majority of sediment...
Resource Type:: Article
Full Text:: ,1 Robert A. Duncan,1 and Nicklas G. Pisias1 Received 23 May 2006; accepted 8 September 2006

Pervasive mantle plume head heterogeneity: Evidence from the late Cretaceous Caribbean-Colombian oceanic plateau

Creator:: Kerr, Andrew C, Tarney, John, Kempton, Pamela D., Spadea, Piera, Nivia, Alvaro, Marriner, Giselle F., and Duncan, Robert A.
Abstract:: In SW Colombia picritic pillow lavas and tuffs, as well as breccias composed of picritic clasts, occur interspersed with basalts of the Central Cordillera and represent accreted portions of the similar to 90 Ma Colombian/Caribbean oceanic plateau (CCOP). We present new geochemical data for these picrites and high-MgO basalts from...
Resource Type:: Article
Full Text:: from the late Cretaceous Caribbean-Colombian oceanic plateau Andrew C. Kerr,1 John Tarney,2 Pamela D

Tahiti: Geochemical evolution of a French Polynesian volcano

Creator:: Duncan, Robert A., Fisk, Martin R., White, William M., and Nielsen, Roger L.
Abstract:: The island of Tahiti, the largest in French Polynesia, comprises two major volcanoes aligned NW-SE, parallel with the general trend of the Society Islands hotspot track. Rocks form this volcanic system are basalts transitional to tholeiites, alkali basalts, basanites, picrites, and evolved lavas. Through K-Ar radiometric dating we have established...
Resource Type:: Article
Full Text:: : Geochemical evolution of a French Polynesian volcano Robert A. Duncan and Martin R. Fisk College of

Leaf litter chemistry controls on decomposition of Pacific Northwest trees and woody shrubs

Creator:: Valachovic, Y. S., Caldwell, B. A., Cromack Jr., K., and Griffiths, Robert P.
Abstract:: The effects of initial leaf litter chemistry on first-year decomposition rates were studied for 16 common Pacific Northwest conifers, hardwoods, and shrubs at the H.J. Andrews Experimental Forest in western Oregon. Leaf litters were analyzed for C, N, P, K, Ca, Mg, proximate organic fractions (nonpolar, polar, acid-hydrolyzable extractives, acid-hydrolyzable...
Resource Type:: Article

Seismic and seafloor evidence for free gas, gas hydrates, and fluid seeps on the transform margin offshore Cape Mendocino

Creator:: Tréhu, Anne Martine, Stakes, Debra S., Bartlett, Cindy D., Chevallier, Johanna, Duncan, Robert A., Goffredi, Shana K., Potter, Susan M., and Salamy, Karen A.
Abstract:: Seismic data and seafloor samples indicate the presence of free gas, gas hydrate, and fluid seeps south of the Gorda Escarpment, a topographic feature that marks the eastern end of the Gorda/Pacific transform plate boundary southwest of Cape Mendocino, California. In spite of high sedimentation rates and high biological productivity,...
Resource Type:: Article
Full Text:: . Stakes,2 Cindy D. Bartlett,1,3 Johanna Chevallier,1 Robert A. Duncan,1 Shana K. Goffredi,2 Susan M

ScholarsArchive@OSU

Background of the birds of Lincoln County project and recommendations for others planning similar projects

Small, aloricate ciliates as a major component of the marine heterotrophic nanoplankton

Molybdenum in the Northeast Pacific Ocean

Genetic diversity of the narrow endemic Astragalus oniciformis (Fabaceae)

Forest soil characteristics in a chronosequence of harvested Douglas-fir forests

Erosion by rivers and transport pathways in the ocean: A provenance tool using 40Ar--39Ar incremental heating on fine-grained sediment

Pervasive mantle plume head heterogeneity: Evidence from the late Cretaceous Caribbean-Colombian oceanic plateau

Tahiti: Geochemical evolution of a French Polynesian volcano

Leaf litter chemistry controls on decomposition of Pacific Northwest trees and woody shrubs

Seismic and seafloor evidence for free gas, gas hydrates, and fluid seeps on the transform margin offshore Cape Mendocino

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