Index Catalog // ScholarsArchive@OSU

Effects of spatial scale and heterogeneity on avian occupancy dynamics and population trends in forested mountain landscapes

Creator:: Frey, Sarah J. K.
Abstract:: Population trends and patterns in species distributions are the major currencies used to examine responses by biodiversity to changing environments. Effective conservation recommendations require that models of both distribution dynamics and population trends accurately reflect reality. However, identification of the appropriate temporal and spatial scales of animal response, and then...
Resource Type:: Dissertation
Full Text:: for 38 species at the Hubbard Brook Experimental Forest (HBEF) in the White Mountains of New

Contributions of Epicormic Branches and Delayed Adaptive Foliage in Coastal Douglas-fir under Variable Density Management Regimes

Creator:: Punches, John W.
Abstract:: The contribution of delayed adaptive reiteration to crown maintenance was explored across a wide range of adjacent open space conditions in early-mature (approximately 60 year old) Douglas-fir located on the eastern slope of Oregon’s Coast Range. The stands had experienced uniform thinning in 1964-65 and 1980-81 to release dominant and...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF John W

Environmental variability and system heterogeneity in terrestrial biogeochemical models

Creator:: Sierra, Carlos Alberto
Abstract:: Ecosystems are highly heterogeneous systems subjected to important levels of environmental variability; however, it is common in terrestrial biogeochemical models to assume homogeneous properties of the elements of the system or constant environmental conditions. For some processes, heterogeneity in these models is treated very simplistically, but there is not much...
Resource Type:: Dissertation
Full Text:: . Dobson, J. A. Foley, D. M. Lodge, M. Pascual, R. Pielke, W. Pizer, C. Pringle, W. V. Reid, K. A. Rose, O

Experimental brood enlargement differentially influences the magnitude of the corticosterone stress response in closely related, co-occurring songbirds

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
Full Text:: songbirds Braelei M. Hardt1 | Daniel R. Ardia2 | Meredith J. Bashaw3 | James W. Rivers4 1Department of

Trends in stream nitrogen concentrations for forested reference catchments across the USA

Creator:: Argerich, A., Johnson, S. L., Sebestyen, S. D., Rhoades, C. C., Greathouse, E., Knoepp, J. D., Adams, M. B., Likens, G. E., Campbell, J. L., McDowell, W. H., Scatena, F. N., and Ice, G. G.
Abstract:: To examine whether stream nitrogen concentrations in forested reference catchments have changed over time and if patterns were consistent across the USA, we synthesized up to 44 yr of data collected from 22 catchments at seven USDA Forest Service Experimental Forests. Trends in stream nitrogen presented high spatial variability both...
Resource Type:: Article
Full Text:: Likens7,8, J L Campbell9, W H McDowell10, F N Scatena11 and G G Ice12 1 Department of Forest Ecosystems and

Use of change-point detection for friction–velocity threshold evaluation in eddy-covariance studies

Creator:: Barr, A. G., Richardson, A. D., Hollinger, D. Y., Papale, D., Arain, M. A., Black, T. A., Bohrer, G., Dragoni, D., Fischer, M. L., Gu, L., Law, B. E., Margolis, H. A., McCaughey, J. H., Munger, J. W., Oechel, W., and Schaeffer, K.
Abstract:: The eddy-covariance method often underestimates fluxes under stable, low-wind conditions at night when turbulence is not well developed. The most common approach to resolve the problem of nighttime flux underestimation is to identify and remove the deficit periods using friction-velocity (u*) threshold filters (u*[superscript Th]). This study modifies an accepted...
Resource Type:: Article
Full Text:: A D W a b c d e f g h i j k l m n o p a A R R A K E F U C , 0 h Agricultural

Experiments and Observations on How Changes in Riparian Forests Affect Light and Stream Ecosystems

Creator:: Swartz, Allison G.
Abstract:: Riparian zones are ecotones between terrestrial and aquatic ecosystems. Processes in streams are strongly influenced by riparian forest communities, age, stage and structure. Temperate forests across much of North America, including riparian areas, are recovering from historic land clearing with many stands in the stem-exclusion phase of development in which...
Resource Type:: Dissertation
Full Text:: HJ Andrews Experimental Forest), and the White Mountains in New Hampshire (at the Hubbard Brook

Mapping Migratory Bird Prevalence Using Remote Sensing Data Fusion

Creator:: Swatantran, Anu, Dubayah, Ralph, Goetz, Scott, Hofton, Michelle, Betts, Matthew G., Sun, Mindy, Simard, Marc, and Holmes, Richard
Abstract:: Background: Improved maps of species distributions are important for effective management of wildlife under increasing anthropogenic pressures. Recent advances in lidar and radar remote sensing have shown considerable potential for mapping forest structure and habitat characteristics across landscapes. However, their relative efficacies and integrated use in habitat mapping remain largely...
Resource Type:: Article
Full Text:: (Deformation Ecosystem Structure and Dynamics of Ice) mission was conducted at the Hubbard Brook Experimental

Buzzing Bolbomyiidae and Air Temperature Monitoring Methods: Investigating Long-Term Ecological Data from the H.J. Andrews Experimental Forest

Creator:: Schmidt, Stephanie A.
Abstract:: The short-term duration of most ecological studies can make it difficult to capture the long-term dynamics of ecosystems and populations. Infrequent or high-impact events can be missed, or erroneously documented as baselines. Long-term ecological research enables a deeper understanding of complex processes, provides a foundation for future insights, and can...
Resource Type:: Masters Thesis
Full Text:: .................................. 30 2.7. Daytime 15-minute average observation ΔTs (°C) against incoming solar radiation (W/m2

The Mountain Pine Beetle, Climate Change and Sustainable Forestry in the Northern Rocky Mountain

Creator:: Gillen, Amanda
Abstract:: Mountain pine beetles (MPB) have killed millions of acres of forest throughout the Rocky Mountain ecoregion in the United States and Canada and climate change may be intensifying outbreaks. Climate change can change forest ecosystems and dynamics by increasing drought conditions and intensifying heat waves. Due to changing climate conditions,...
Resource Type:: Capstone Project
Full Text:: the same tree (Hubbard, 2015; Pitman et al., 1968). Adult MPB burrow into the bark where each mated

ScholarsArchive@OSU

Effects of spatial scale and heterogeneity on avian occupancy dynamics and population trends in forested mountain landscapes

Contributions of Epicormic Branches and Delayed Adaptive Foliage in Coastal Douglas-fir under Variable Density Management Regimes

Environmental variability and system heterogeneity in terrestrial biogeochemical models

Experimental brood enlargement differentially influences the magnitude of the corticosterone stress response in closely related, co-occurring songbirds

Trends in stream nitrogen concentrations for forested reference catchments across the USA

Use of change-point detection for friction–velocity threshold evaluation in eddy-covariance studies

Experiments and Observations on How Changes in Riparian Forests Affect Light and Stream Ecosystems

Mapping Migratory Bird Prevalence Using Remote Sensing Data Fusion

Buzzing Bolbomyiidae and Air Temperature Monitoring Methods: Investigating Long-Term Ecological Data from the H.J. Andrews Experimental Forest

The Mountain Pine Beetle, Climate Change and Sustainable Forestry in the Northern Rocky Mountain

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