Index Catalog // ScholarsArchive@OSU

Influence of forest structure and experimental green-tree retention on northern flying squirrel (Glaucomys sabrinus) abundance

Creator:: Holloway, Gillian L., Smith, Winston P., Halpern, Charles B., Gitzen, Robert A., Maguire, Christine C., and West, Stephen D.
Abstract:: In many regions of the world, forest management has shifted from practices emphasizing timber production to more sustainable harvesting that integrates ecological values, including maintenance of biodiversity, wildlife habitat, and ecological goods and services. To this end, management strategies emphasize retention of stand structures that meet the needs of forest-obligate...
Resource Type:: Article

Conifer response to three silvicultural treatments in the Oregon Coast Range foothills

Creator:: Walter, Scott T. and Maguire, Chris C.
Abstract:: This study assessed growth, condition, and mortality of residual trees one decade after harvest across three silvicultural treatments in thirty 85- to 125-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands in the Oregon Coast Range foothills. Group-selection cuts had 33% of the entire stand volume extracted as patches approximately 0.2–0.8 ha...
Resource Type:: Article
Full Text:: Coast Range foothills Scott T. Walter and Chris C. Maguire Abstract: This study assessed growth

The effect of local stand structure on growth and growth efficiency in heterogeneous stands of ponderosa pine and lodgepole pine in central Oregon

Creator:: Mainwaring, Douglas B. and Maguire, Douglas A. (Douglas Alan)
Abstract:: Basal area and height growth were analyzed for individual trees in uneven-aged ponderosa pine (Pinus ponderosa Dougl. ex Laws.) and lodgepole pine (Pinus contorta Dougl. ex. Loud.) stands in central Oregon. Basal area growth was modeled as a function of other stand and tree variables to address three general objectives:...
Resource Type:: Article
Full Text:: B. Mainwaring and Douglas A. Maguire Abstract: Basal area and height growth were analyzed for

Bayesian models describing microhabitat associations of infrequently captured small mammals sampled under a complex hierarchical design

Creator:: Lam, Tzeng Yih and Maguire, Douglas A.
Abstract:: Knowledge about the relationship between habitat structure and abundance of a target species facilitates biodiversity conservation in managed forests. However, modeling the relationship for infrequent small mammal species in silvicultural experiments introduces the challenge of excessive zero counts and complex hierarchical sampling. A common solution has been to ignore infrequent...
Resource Type:: Article
Full Text:: -(541)-737-4316 E-mail: tylam.forest@gmail.com Douglas A. Maguire Department of Forest

Fertilization impacts on Swiss needle cast disease severity in western Oregon

Creator:: Mulvey, Robin L., Shaw, David C., and Maguire, Douglas A.
Abstract:: The influence of fertilization on disease severity is unknown in most forest pathosystems. Fertilization treatments were randomly applied to 0.01 ha plots centered on individual dominant or co-dominant Douglas-fir trees in ten Douglas-fir stands from coastal Oregon to the foothills of the Oregon Cascade Range, USA. This region is affected...
Resource Type:: Article
Full Text:: . Mulvey ⇑, David C. Shaw, Douglas A. Maguire Department of Forest Engineering, Resources and Management

Crown structure and growth efficiency of red spruce in uneven-aged, mixed-species stands in Maine

Creator:: Maguire, Douglas A., Brissette, John C., and Gu, Lianhong
Abstract:: Several hypotheses about the relationships among individual tree growth, tree leaf area, and relative tree size or position were tested with red spruce (Picea rubens Sarg.) growing in uneven-aged, mixed-species forests of south-central Maine, U.S.A. Based on data from 65 sample trees, predictive models were developed to (i) estimate the...
Resource Type:: Article
Full Text:: , mixed-species stands in Maine Douglas A. Maguire, John C. Brissette, and Lianhong Gu Abstract:Several

Forest-floor Disturbance Reduces Chipmunk (Tamias spp.) Abundance Two Years after Variable-retention Harvest of Pacific Northwestern Forests

Creator:: Wilk, Randall J., Harrington, Timothy B., Gitzen, Robert A., and Maguire, Chris C.
Abstract:: We evaluated the two-year effects of variable-retention harvest on chipmunk (Tamias spp.) abundance (Nˆ ) and habitat in mature coniferous forests in western Oregon and Washington because wildlife responses to density/pattern of retained trees remain largely unknown. In a randomized complete-block design, six treatments were applied to 13-ha units at...
Resource Type:: Article
Full Text:: Northwestern Forests Wilk, R. J., Harrington, T. B., Gitzen, R. A., & Maguire, C. C. (2015). Forest-Floor

Activation of Immobilized Lipase in Non-Aqueous Systems by Hydrophobic Poly-DL-Tryptophan Tethers

Creator:: Schilke, Karl F. and Kelly, Christine
Abstract:: Many industrially important reactions use immobilized enzymes in non-aqueous, organic systems, particularly for the production of chiral compounds such as pharmaceutical precursors. The addition of a spacer molecule (“tether”) between a supporting surface and enzyme often substantially improves the activity and stability of enzymes in aqueous solution. Most “long” linkers...
Resource Type:: Article
Full Text:: Hydrophobic Poly-DL-Tryptophan Tethers Karl F. Schilke, Christine Kelly. School of Chemical

Topology of non-negatively curved manifolds

Creator:: Escher, Christine and Ziller, Wolfgang
Abstract:: An important question in the study of Riemannian manifolds of positive sectional curvature is how to distinguish manifolds that admit a metric with non-negative sectional curvature from those that admit one of positive curvature. Surprisingly, if the manifolds are compact and simply connected, all known obstructions to positive curvature are...
Resource Type:: Article
Full Text:: TOPOLOGY OF NON-NEGATIVELY CURVED MANIFOLDS CHRISTINE

Thinning ponderosa pine (Pinus ponderosa) stands reduces mortality while maintaining stand productivity

Creator:: Zhang, Jianwei, Ritchie, Martin W., Maguire, Douglas A., and Oliver, William W.
Abstract:: We analyzed 45 years of data collected from three ponderosa pine (Pinus ponderosa Douglas ex P. Lawson & C. Lawson) levels-of-growing-stock installations in Oregon (OR) and northern California (CA), USA, to determine the effect of stand density regimes on stand productivity and mortality. We found that periodic annual increment (PAI)...
Resource Type:: Article
Full Text:: . Maguire, and William W. Oliver Abstract:We analyzed 45 years of data collected from three ponderosa pine

ScholarsArchive@OSU

Influence of forest structure and experimental green-tree retention on northern flying squirrel (Glaucomys sabrinus) abundance

Conifer response to three silvicultural treatments in the Oregon Coast Range foothills

The effect of local stand structure on growth and growth efficiency in heterogeneous stands of ponderosa pine and lodgepole pine in central Oregon

Bayesian models describing microhabitat associations of infrequently captured small mammals sampled under a complex hierarchical design

Fertilization impacts on Swiss needle cast disease severity in western Oregon

Crown structure and growth efficiency of red spruce in uneven-aged, mixed-species stands in Maine

Forest-floor Disturbance Reduces Chipmunk (Tamias spp.) Abundance Two Years after Variable-retention Harvest of Pacific Northwestern Forests

Activation of Immobilized Lipase in Non-Aqueous Systems by Hydrophobic Poly-DL-Tryptophan Tethers

Topology of non-negatively curved manifolds

Thinning ponderosa pine (Pinus ponderosa) stands reduces mortality while maintaining stand productivity

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