Index Catalog // ScholarsArchive@OSU

Creator:: Best, Lincoln R., Dunlap, Joshua B., Jackson, August S., and Rivers, James W.
Abstract:: This key to the bee genera of the Pacific Northwest provides dichotomous couplets which aid the user in identifying 60 genera of bees which occur or may occur in the region. The key architecture is based strongly on the key to the genera of North and Central America published in...
Resource Type:: Technical Report

Creator:: Best, Lincoln R., Dunlap, Joshua B., Jackson, August S., Rivers, James W., and Williams, Paul H.
Abstract:: This species key to female bumble bees of the Pacific Northwest provides dichotomous couplets which aid the user in identifying 27 species which occur or have occurred historically, and may still be present in the region. The key architecture is based strongly on the key to species for females found...
Resource Type:: Technical Report

Creator:: Best, Lincoln R., Jackson, August S., Rivers, James W., and Williams, Paul H.
Abstract:: This species key to male bumble bees of the Pacific Northwest provides dichotomous couplets which aid the user in identifying 27 species which occur or have occurred historically, and may still be present in the region. The key architecture is based strongly on the key to species for males found...
Resource Type:: Technical Report

Creator:: Rivers, James W., Mathis, Codey L., Moldenke, Andrew R., and Betts, Matthew G.
Abstract:: The use of timber harvest residue as an energy source is thought to have environmental benefits relative to food-based crops, yet the ecological impact of this practice remains largely unknown. We assessed whether the abundance and diversity of wild bees (Apoidea) were influenced by the removal of harvest residue and...
Resource Type:: Article

Creator:: Barry, Amy M., Hagar, Joan C., and Rivers, James W.
Abstract:: Snags are important habitat features for many forest-dwelling species, so reductions in the number of snags can lead to the loss of biodiversity in forest ecosystems. Intentional snag creation is often used in managed forests to mitigate the long-term declines of naturally created snags, yet information regarding the use of...
Resource Type:: Article

Creator:: Hardt, Braelei M., Ardia, Daniel R., Bashaw, Meredith J., and Rivers, James W.
Abstract:: 1. Rearing environments can shape offspring phenotype across taxa, yet little is known about how brood size influences hypothalamic-pituitary axis functioning, whether its expression trades off with growth, and the degree to which these -relationships vary between species. 2. We evaluated how brood size influenced nestling physiological (glucocorticoids) and somatic...
Resource Type:: Article

Creator:: Rivers, James W., Johnson, J. Matthew, Haig, Susan M., Schwarz, Carl J., Burnett, L. Joseph, Brandt, Joseph, George, Daniel, and Grantham, Jesse
Abstract:: Condors and vultures comprise the only group of terrestrial vertebrates in the world that are obligate scavengers, and these species move widely to locate ephemeral, unpredictable, and patchily-distributed food resources. In this study, we used high-resolution GPS location data to quantify monthly home range size of the critically endangered California...
Resource Type:: Article

Creator:: Kelly, Terra R., Grantham, Jesse, George, Daniel, Welch, Alacia, Brandt, Joseph, Burnett, L. Joseph, Sorenson, Kelly J., Johnson, Matthew, Poppenga, Robert, Moen, David, Rasico, James, Rivers, James W., Battistone, Carie, and Johnson, Christine K.
Abstract:: Large-scale poisoning events are common to scavenging bird species that forage communally, many of which are in decline. To reduce the threat of poisoning and compensate for other persistent threats, management, including supplemental feeding, is ongoing for many reintroduced and endangered vulture populations. Through a longitudinal study of lead exposure...
Resource Type:: Article

Creator:: Haig, Susan M., D'Elia, Jesse, Eagles-Smith, Collin, Fair, Jeanne M., Gervais, Jennifer, Herring, Garth, Rivers, James W., and Schulz, John H.
Abstract:: Lead (Pb) is a metabolic poison that can negatively influence biological processes, leading to illness and mortality across a large spectrum of North American avifauna (>120 species) and other organisms. Pb poisoning can result from numerous sources, including ingestion of bullet fragments and shot pellets left in animal carcasses, spent...
Resource Type:: Article

Creator:: Rivers, James W., Johnson, J. Matthew, Haig, Susan M., Schwarz, Carl J., Glendening, John W., Burnett, L. Joseph, George, Daniel, and Grantham, Jesse
Abstract:: Condors and vultures are distinct from most other terrestrial birds because they use extensive soaring flight for their daily movements. Therefore, assessing resource selection by these avian scavengers requires quantifying the availability of terrestrial-based habitats, as well as meteorological variables that influence atmospheric conditions necessary for soaring. In this study,...
Resource Type:: Article

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