Index Catalog // ScholarsArchive@OSU

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

Three-year growth response of young Douglas-fir to nitrogen, calcium, phosphorus, and blended fertilizers in Oregon and Washington

Creator:: Mainwaring, Douglas B., Maguire, Douglas A., and Perakis, Steven S.
Abstract:: Studies of nutrient limitation in Douglas-fir forests of the Pacific Northwest focus predominantly on nitrogen, yet many stands demonstrate negligible or even negative growth response to nitrogen fertilization. To understand what nutrients other than nitrogen may limit forest productivity in this region, we tested six fertilizer treatments for their ability...
Resource Type:: Article
Full Text:: and Washington Mainwaring, D. B., Maguire, D. A., & Perakis, S. S. (2014). Three-year growth

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

Climatic influences on needle cohort survival mediated by Swiss needle cast in coastal Douglas-fir

Creator:: Zhao, Junhui, Maguire, Douglas A., Mainwaring, Douglas B., and Kanaskie, Alan
Abstract:: Swiss needle cast (SNC) severity in Douglas-fir (Pseudotsuga menziesii) has been shown to vary spatially and temporally in response to climatic factors both within its native range and in regions where it has been planted as an exotic species. Survival models were developed for different Douglas-fir needle cohorts to enhance...
Resource Type:: Article
Full Text:: Zhao, Douglas A. Maguire, Douglas B. Mainwaring 3 Department of Forest Engineering, Resources and

Ten-year growth and mortality in young Douglas-fir stands experiencing a range in Swiss needle cast severity

Creator:: Maguire, Douglas A., Mainwaring, Douglas B., and Kanaskie, Alan
Abstract:: Swiss needle cast, a foliar disease caused by the Ascomycete Phaeocryptopus gaeumannii (T. Rohde) Petr., continues to afflict Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) in north coastal Oregon. Permanent plots were installed in 1998 to assess growth impacts and monitor disease severity. Gross periodic annual increment was measured for three 2-year...
Resource Type:: Article
Full Text:: Douglas A. Maguire 7 College of Forestry 8 Oregon State University 9 Corvallis, OR 97331 USA 10

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

Thinning Mixed-Species Stands of Douglas-Fir and Western Hemlock in the Presence of Swiss Needle Cast: Guidelines Based on Relative Basal Area Growth of Individual Trees

Creator:: Zhao, Junhui, Maguire, Douglas A., Mainwaring, Douglas B., Wehage, Jon, and Kanaskie, Alan
Abstract:: In coastal forests of the Pacific Northwest, young coniferous plantations typically contain a mixture of planted and natural Douglas-fir (Pseudotsuga menziesii) and western hemlock (Tsuga heterophylla). Swiss needle cast (SNC) disease inhibits the growth of Douglas-fir to varying degrees in these stands, depending on SNC severity. In addition to the...
Resource Type:: Article
Full Text:: Needle Cast: Guidelines Based on Relative Basal Area Growth of Individual Trees Zhao, J., Maguire, D. A

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:: reduces mortality while maintaining stand productivity Jianwei Zhang, Martin W. Ritchie, Douglas A

Studies of Chitin Nanofiber Production and Photoluminescent Biosilica from Diatoms with and without Germanium

Creator:: LeDuff, Paul A.
Abstract:: There is significant interest in harnessing the biosynthetic capacities of photosynthetic diatom microalgae for the production of unique bioinspired nanomaterials. Specifically, this research focuses on understanding the photoluminescent properties of diatom biosilica and β-chitin nanofiber production in diatoms. Diatoms are single-celled microalgae that possess intricately patterned biosilica shells called, frustules....
Resource Type:: Dissertation
Full Text:: Biosilica from Diatoms with and without Germanium by Paul LeDuff A DISSERTATION

In defense of P values

Creator:: Murtaugh, Paul A.
Abstract:: Statistical hypothesis testing has been widely criticized by ecologists in recent years. I review some of the more persistent criticisms of P values and argue that most stem from misunderstandings or incorrect interpretations, rather than from intrinsic shortcomings of the P value. I show that P values are intimately linked...
Resource Type:: Article
Full Text:: PAUL A. MURTAUGH1 Department of Statistics, Oregon State University, Corvallis, Oregon 97331 USA

ScholarsArchive@OSU

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

Three-year growth response of young Douglas-fir to nitrogen, calcium, phosphorus, and blended fertilizers in Oregon and Washington

Fertilization impacts on Swiss needle cast disease severity in western Oregon

Climatic influences on needle cohort survival mediated by Swiss needle cast in coastal Douglas-fir

Ten-year growth and mortality in young Douglas-fir stands experiencing a range in Swiss needle cast severity

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

Thinning Mixed-Species Stands of Douglas-Fir and Western Hemlock in the Presence of Swiss Needle Cast: Guidelines Based on Relative Basal Area Growth of Individual Trees

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

Studies of Chitin Nanofiber Production and Photoluminescent Biosilica from Diatoms with and without Germanium

In defense of P values

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