Index Catalog // ScholarsArchive@OSU

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...
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Microstructure of viscoelastic thermal compressed (VTC) wood using computed microtomography

Creator:: Standfest, Gernot, Kutnar, Andreja, Plank, Bernhard, Petutschnigg, Alexander, Kamke, Frederick A., and Dunky, Manfred
Abstract:: The paper describes for the first time the analysis of the structure of compressed wood using computed tomography. The anatomical structures of Douglas-fir and hybrid poplar before and after densification with the Viscoelastic Thermal Compression (VTC) process were described by pore size distributions and mean pore sizes and compared. The...
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Sustainable Development and Green Buildings

Creator:: Sinha, Arijit, Gupta, Rakesh, and Kutnar, Andreja
Abstract:: Global sustainability goals have led to the development of the green building movement. The Green Building Program, stemming from the movement, has had unprecedented success as it provides a quantifi able metric to people’s efforts towards sustainable development. Sustainable development and green buildings are often used interchangeably. Although, sustainable development...
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Examination of moisture content variation within an operational wet deck

Creator:: Schimleck, Laurence, Love-Myers, Kim, Sanders, Joe, Raybon, Heath, Daniels, Richard, Andrews, Edward, and Schilling, Erik
Abstract:: Many forest products companies in the southeastern United States store large volumes of round-wood under wet storage. Log quality depends on maintaining a high and constant wood moisture content; however, limited knowledge exists regarding moisture variation within individual logs, and within wet decks as a whole, making it impossible to...
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Abundance of natural regeneration and growth comparisons with planted seedlings 10–13 years after commercial thinning in 50-year-old Douglas-fir, Douglas-fir/western hemlock, Oregon Coast Range

Creator:: Nabel, Mark R., Newton, Michael, and Cole, Elizabeth C.
Abstract:: Post-thinning natural regeneration in the Pacific Northwest of USA was evaluated 13 years after thinning 50-year-old Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco var. menziesii) stands on a drier, interior Coast Range site (McDonald) and 10 years after thinning 50- to 55-year-old Douglas-fir/western hemlock (Tsuga heterophylla [Raf.] Sarg.) stands on a moister,...
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Epigenetic regulation of adaptive responses of forest tree species to the environment

Creator:: Braeutigam, Katharina, Vining, Kelly J., Lafon-Placette, Clement, Fossdal, Carl G., Mirouze, Marie, Gutierrez Marcos, Jose, Fluch, Silvia, Fernandez Fraga, Mario, Angeles Guevara, M., Abarca, Dolores, Johnsen, Oystein, Maury, Stephane, Strauss, Steven H., Campbell, Malcolm M., Rohde, Antje, Diaz-Sala, Carmen, and Cervera, Maria-Teresa
Abstract:: Epigenetic variation is likely to contribute to the phenotypic plasticity and adaptative capacity of plant species, and may be especially important for long-lived organisms with complex life cycles, including forest trees. Diverse environmental stresses and hybridization/polyploidization events can create reversible heritable epigenetic marks that can be transmitted to subsequent generations...
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A comparison of the hydraulic efficiency of a palm species (Iriartea deltoidea) with other wood types

Creator:: Renninger, Heidi J., McCulloh, Katherine A., and Phillips, Nathan
Abstract:: Palms are an important component of tropical ecosystems, living alongside dicotyledonous trees, even though they have a very different growth pattern and vascular system. As monocots, vessels in palms are located within vascular bundles and, without a vascular cambium that many dicotyledonous trees possess, palms cannot add additional vessels to...
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A Dual-Objective-Based Tornado Design Philosophy

Creator:: van de Lindt, John W., Pei, Shiling, Dao, Thang, Graettinger, Andrew, Prevatt, David O., Gupta, Rakesh, and Coulbourne, William
Abstract:: Tornadoes represent a unique natural hazard because of the very low probability of occurrence, short warning times (on the order of only a few minutes), and the intense and destructive forces imposed on engineered and non-engineered buildings. The very low-probability very high-consequence nature of a tornado strike makes designing for...
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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)...
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Complex restoration challenges: Weeds, seeds, and roads in a forested Wildland Urban Interface

Creator:: Buonopane, Michelle, Snider, Gabrielle, Kerns, Becky K., and Doescher, Paul S.
Abstract:: Federal policies in the US strongly emphasize reducing hazardous fuels at the Wildland Urban Interface (WUI). However, these areas present restoration challenges as they often have exotic weeds, frequent human disturbance, and the presence of roads. Understanding seed banks is important in planning for desirable post-disturbance community conditions, developing integrated...
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Models of presence-absence estimate abundance as well as (or even better than) models of abundance: the case of the butterfly Parnassius apollo

Creator:: Gutiérrez, David, Harcourt, Jennifer, Díez, Sonia B., Gutiérrez Illán, Javier, and Wilson, Robert J.
Abstract:: Models relating species distribution records to environmental variables are increasingly applied to biodiversity conservation. Such techniques could be valuable to predict the distribution, abundance or habitat requirements of species that are rare or otherwise difficult to survey. However, despite widely-documented positive intraspecific relationships between occupancy and abundance, few studies have...
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Models of presence-absence estimate abundance as well as (or even better than) models of abundance: the case of the butterfly Parnassius apollo

Creator:: Gutiérrez, David, Harcourt, Jennifer, Díez, Sonia B., Gutiérrez Illán, Javier, and Wilson, Robert J.
Abstract:: Models relating species distribution records to environmental variables are increasingly applied to biodiversity conservation. Such techniques could be valuable to predict the distribution, abundance or habitat requirements of species that are rare or otherwise difficult to survey. However, despite widely-documented positive intraspecific relationships between occupancy and abundance, few studies have...
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Thinning effects on forest productivity: Consequences of preserving old forests and mitigating impacts of fire and drought

Creator:: Law, Beverly E., Hudiburg, Tara W., and Luyssaert, Sebastiaan
Abstract:: Background: Management strategies have been proposed to minimise the effects of climate change on forest resilience. Aims: We investigated the Pacific Northwest US region forest carbon balance under current practices, and changes that may result from management practices proposed for the region’s 34 million ha of forests to mitigate climate...
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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...
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Voluntary Environmental Programs at an Alpine Ski Area: Visitor Perceptions, Attachment, Value Orientations, and Specialization

Creator:: Needham, Mark D. and Little, Christopher M.
Abstract:: This article examines visitor perceptions of voluntary environmental programs (VEPs) at the Mt. Bachelor ski area in Oregon, USA by examining what they know about VEPs, how these programs influence motivations to visit this area currently and in the future, and how place attachment, value orientations, and specialization influence these...
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Oregon’s Forest Sector Innovation System: An Investigation Towards Advanced Performance

Creator:: Orozco, Nadine, Hansen, Eric, Knowles, Chris, and Leavengood, Scott
Abstract:: The forest products industry has faced numerous challenges in remaining innovative: outside forces such as industry culture and policy provide few incentives while poor communication among industry actors impedes creative growth from within. This article outlines results gathered from personal interviews with industry professionals and an industry survey on key...
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Widespread Mesopredator Effects After Wolf Extirpation

Creator:: Ripple, William J., Wirsing, Aaron J., Wilmers, Christopher C., and Letnic, Mike
Abstract:: Herein, we posit a link between the ecological extinction of wolves in the American West and the expansion in distribution, increased abundance, and inflated ecological influence of coyotes. We investigate the hypothesis that the release of this mesopredator from wolf suppression across much of the American West is affecting, via...
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Implementation of Plan Irregularity Rapid Visual Screening Tool for Wood-Frame, Single-Family Dwellings

Creator:: Lucksiri, K., Miller, T. H., Gupta, R., Pei, S., and van de Lindt, J. W.
Abstract:: A plan irregularity rapid visual screening method for seismic performance assessment of wood-frame, single-family dwellings is presented. Results from 124 samples were compared with (i) building-specific, non-linear time-history analysis, and (ii) FEMA 154 and ASCE 31 Tier 1. Verification using two houses damaged in the 1994 Northridge Earthquake is presented....
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Recreation Specialization and Related Concepts in Leisure Research

Creator:: Needham, Mark D., Scott, David, and Vaske, Jerry J.
Abstract:: More than 40 years have passed since Shafer (1969) challenged the existence of the “average camper.” Recognizing that participants in recreation activities are heterogeneous in their commitments and interests, researchers have emphasized the importance of differentiating users into meaningful homogeneous subgroups. In his seminal article, Bryan (1977) coined the concept...
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Activity Substitutability and Degree of Specialization among Deer and Elk Hunters in Multiple States

Creator:: Needham, Mark D. and Vaske, Jerry J.
Abstract:: This article examines relationships between hunter specialization and activity substitutability. Data were obtained from a mail survey of 6,983 deer hunters in eight states and 2,584 elk hunters in three states. Activity substitutability was measured by asking what activity would provide the same satisfaction as deer or elk hunting. Between...
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Toward biologically meaningful net carbon exchange estimates for tall, dense canopies: Multi-level eddy covariance observations and canopy coupling regimes in a mature Douglas-fir forest in Oregon

Creator:: Thomas, Christoph K., Martin, Jonathan G., Law, Beverly E., and Davis, Kent
Abstract:: We sought to improve net ecosystem exchange (NEE) estimates for a tall, dense, mature Douglas-Fir forest in the Oregon Coast range characterized by weak flows, systematic wind directional shear, and limited turbulent mixing throughout the diurnal period. We used eddy covariance (EC) observations at two levels and concurrent biological measurements...
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Automated reconstruction of tree and canopy structure for modeling the internal canopy radiation regime

Creator:: van Leeuwen, Martin, Coops, Nicholas C., Hilker, Thomas, Wulder, Michael A., Newnham, Glenn J., and Culvenor, Darius S.
Abstract:: Understanding canopy radiation regimes is critical to successfully modeling vegetation growth and function. For instance, the vertical distribution of photosynthetically active radiation (PAR) affects vegetation growth, informative upon carbon and energy cycling. Availing upon advances in information capture and computing power, geometrically explicit modeling of forest structure becomes increasingly possible....
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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...
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Remote sensing of transpiration and heat fluxes using multi-angle observations

Creator:: Hilker, Thomas, Hall, Forrest G., Coops, Nicholas C., Collatz, James G., Black, T. Andrew, Tucker, Compton J., Sellers, Piers J., and Grant, Nicholas
Abstract:: Surface energy balance is a major determinant of land surface temperature and the Earth's climate. To date, there is no approach that can produce effective, physically consistent, global and multi-decadal energy–water flux data over land. Net radiation (R[subscript n]) can be quantified regionally using satellite retrievals of surface reflectance and...
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Stream temperature and streamside cover 14-17 years after clearcutting along small forested streams, western Oregon

Creator:: Newton, Mike and Cole, Liz
Abstract:: Stream temperatures were monitored on seven low-elevation western Oregon streams immediately after clearcut harvesting and 14-17 years later in two studies that examined buffer designs. One study on four streams used no-tree buffers with all trees next to the stream harvested within the clearcut units. The second study on three...
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Nutrient uptake in a stream affected by hydropower plants: comparison between stream channels and diversion canals

Creator:: Izagirre, Oihana, Argerich, Alba, Marti, Eugenia, and Elosegi, Arturo
Abstract:: Small hydropower plants divert part of the water from wide and physically complex stream channels with active hyporheic areas to narrow and hydraulically simple concrete canals, and thus, might affect nutrient dynamics. We compared nutrient uptake in diversion canals and in stream channels in the Leitzaran Stream (Basque Country, northern...
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Amenity landownership, land use change and the re-creation of “working landscapes”

Creator:: Abrams, Jesse and Bliss, John
Abstract:: In recent years the “working landscape” concept has risen to prominence in popular, academic, and policy discourse surrounding conservation of both natural and cultural values in inhabited landscapes. Despite its implied reconciliation of commodity production and environmental protection, this concept remains contested terrain, masking tensions over land use practices and...
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Wolf, Elk, and Aspen Food Web Relationships: Context and Complexity

Creator:: Eisenberg, Cristina, Seager, S. Trent, and Hibbs, David E.
Abstract:: Like most ecological communities, aspen (Populus tremuloides) forests are influenced by a synergy of bottom-up (resources-driven) and top-down (predator-driven) processes. Since the 1920s, ecologists have observed the decline of many aspen communities throughout the Intermountain West. The extent and possible drivers of this decline are topics of much recent scientific...
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Australasian sequestrate fungi 18: Solioccasus polychromus gen. & sp. nov., a richly colored, tropical to subtropical, hypogeous fungus

Creator:: Trappe, James M., Castellano, Michael A., Halling, Roy E., Osmundson, Todd W., Binder, Manfred, Fechner, Nigel, and Malajczuk, Nicholas
Abstract:: Solioccasus polychromus gen. & sp. nov., the most brightly colored hypogeous fungus known, is described from Papua New Guinea and tropical northern Australia south into subtropical forests along the Queensland coast and coastal mountains to near Brisbane. Phylogenetic analysis of molecular data places it as a sister genus to Bothia...
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Resilience in Quaking Aspen: Recent advances and future needs

Creator:: Rogers, Paul C., Eisenberg, Cristina, and St. Clair, Samuel B.
Abstract:: Quaking aspen (Populus tremuloides) sustainability is a topic of intense interest in forest ecology. Reports range from declines to persisting or increasing coverage in some areas. Moreover, there is little agreement on ultimate factors driving changes. Low aspen recruitment has been attributed to climate patterns, past management, herbivore increases, competitive...
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The Impact of Buffer Zone Size and Management on Illegal Extraction, Park Protection, and Enforcement

Creator:: Robinson, Elizabeth J. Z., Albers, Heidi J., and Busby, Gwenlyn M.
Abstract:: Many protected areas or parks in developing countries have buffer zones at their boundaries to achieve the dual goals of protecting park resources and providing resource benefits to neighbouring people. Despite the prevalence of these zoning policies, few behavioural models of people’s buffer zone use inform the sizing and management...
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Dynamics of coarse woody debris following wildfire in a mountain hemlock (Tsuga mertensiana) forest

Creator:: Acker, Steven A., Kertis, Jane, Bruner, Howard, O’Connell, Kari, and Sexton, Jay
Abstract:: Coarse woody debris (CWD, comprised of snags and downed logs) is an important component of the structure and function of forest ecosystems, one which both influences the availability of fuel for wildfires and can be a result of wildfires. We studied snag persistence, and changes in mass of CWD in...
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Influence of the thermo-hydro-mechanical treatments of wood on the performance against wood degrading fungi

Creator:: Lesar, Bostjan, Humar, Miha, Kamke, Frederick A., and Kutnar, Andreja
Abstract:: Hybrid poplar (Populus deltoides × Populus trichocarpa) and Douglas-fir (Pseudotsuga menziesii) wood specimens were densified with three variations of Thermo-Hydro-Mechanical (THM) treatment. The THM treatments differed in the steam environment, including transient steam (TS), saturated steam (SS), and saturated steam with 1 minute post-heat-treatment at 200°C (SS+PHT). The bending properties,...
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Forest Giants: Denis Lavender, Richard Hermann, and Douglas-fir

Creator:: Bernart, Bryan
Abstract:: Keywords: Pseudotsuga menziesii
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Linking aboveground net primary productivity to soil carbon and dissolved organic carbon in complex terrain

Creator:: Peterson, Fox S. and Lajtha, Kate J.
Abstract:: Factors influencing soil organic matter (SOM) stabilization and dissolved organic carbon (DOC) content in complex terrain, where vegetation, climate, and topography vary over the scale of a few meters, are not well understood. We examined the spatial correlations of lidar and geographic information system-derived landscape topography, empirically measured soil characteristics,...
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Evaluating theories of drought-induced vegetation mortality using a multimodel– experiment framework

Creator:: McDowell, Nate G., Gehres, Nathan, Limousin, Jean Marc, Macalady, Alison, Martínez-Vilalta, Jordi, Mencuccini, Maurizio, Plaut, Jennifer A., Ogée, Jérôme, Robert E., Pangle, Rasse, Daniel P., Ryan, Michael G., Fisher, Rosie A., Sevanto, Sanna, Waring, Richard H., Williams, A. Park, Yepez, Enrico A., Pockman, William T., Xu, Chonggang, Domec, Jean-Christophe, Holtta, Teemu, Mackay, D. Scott, Sperry, John S., Boutz, Amanda, and Dickman, Lee
Abstract:: Model–data comparisons of plant physiological processes provide an understanding of mechanisms underlying vegetation responses to climate. We simulated the physiology of a pi~non pine–juniper woodland (Pinus edulis–Juniperus monosperma) that experienced mortality during a 5 yr precipitation-reduction experiment, allowing a framework with which to examine our knowledge of drought-induced tree mortality....
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Initial experimental effects of intensive forest management on avian abundance

Creator:: Betts, Matthew G., Verschuyl, Jake, Giovanini, Jack, Stokely, Thomas D., and Kroll, Andrew J.
Abstract:: Components of biodiversity in intensively managed forest stands may be reduced in comparison to naturally regenerated stands. Use of herbicides to suppress herbaceous and woody plant species that compete with planted seedlings has been implicated in negative impacts. We designed a large-scale experimental study to test the influence of intensive...
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Satellite observed widespread decline in Mongolian grasslands largely due to overgrazing

Creator:: Hilker, Thomas, Natsagdorj, Enkhjargal, Waring, Richard H., Lyapustin, Alexei, and Wang, Yujie
Abstract:: The Mongolian Steppe is one of the largest remaining grassland ecosystems. Recent studies have reported widespread decline of vegetation across the steppe and about 70% of this ecosystem is now considered degraded. Among the scientific community there has been an active debate about whether the observed degradation is related to...
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