Thematische Bibliographien / Understory plants – Oregon – Portland

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Auswahl der wissenschaftlichen Literatur zum Thema „Understory plants – Oregon – Portland“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 10. Februar 2022

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Zeitschriftenartikel zum Thema "Understory plants – Oregon – Portland"

Osterbauer, N. K., S. Lane, and A. Trippe. "Phytophthora ramorum Identified Infecting Eastern Teaberry (Gaultheria procumbens) Plants Shipped to Oregon." Plant Health Progress 15, no. 1 (2014): 9–10. http://dx.doi.org/10.1094/php-br-13-0109.

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These results confirm the pathogenicity of Phytophthora ramorum on eastern teaberry and complete Koch's Postulates for this new host. Eastern teaberry is an understory species native to eastern North America, with its range extending from Alabama and Georgia (United States) in the south to Manitoba and Quebec (Canada) in the north. Infected nursery plants represent a potential pathway for P. ramorum introduction to this region. Accepted for publication 22 November 2013. Published 22 January 2014.

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Cole, Elizabeth C. "Managing for Mature Habitat in Production Forests of Western Oregon and Washington." Weed Technology 10, no. 2 (1996): 422–28. http://dx.doi.org/10.1017/s0890037x00040173.

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Standard timber management practices in the Pacific Northwest result in stands which often vary from unmanaged stands in structure and composition. Forest and wildlife managers have identified a deficit of stands in the mature (> 100-yr-old) age class that contain certain desirable wildlife habitat features. Techniques are being developed that would increase the likelihood that managed stands can produce these characteristics. The key desirable components in these stands include large (> 75 cm diam breast height) conifer trees, snags, coarse woody debris, and understory structure, includ

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Zald, Harold S. J., Becky K. Kerns, and Michelle A. Day. "Limited Effects of Long-Term Repeated Season and Interval of Prescribed Burning on Understory Vegetation Compositional Trajectories and Indicator Species in Ponderosa Pine Forests of Northeastern Oregon, USA." Forests 11, no. 8 (2020): 834. http://dx.doi.org/10.3390/f11080834.

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Fire exclusion has dramatically altered historically fire adapted forests across western North America. In response, forest managers reduce forest fuels with mechanical thinning and/or prescribed burning to alter fire behavior, with additional objectives of restoring forest composition, structure, and ecosystem processes. There has been extensive research on the effects of fuel reduction and restoration treatments on trees, fuels, regeneration, and fire behavior; but less is known about how these treatments influence understory vegetation, which contains the majority of vascular plant diversit

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Alaback, Paul B., and F. R. Herman. "Long-term response of understory vegetation to stand density in Picea-Tsuga forests." Canadian Journal of Forest Research 18, no. 12 (1988): 1522–30. http://dx.doi.org/10.1139/x88-233.

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The 17-year response of understory vegetation to forest thinning experiments was examined in two study sites on the central Oregon coast to determine the role of overstory species composition and stand density on forest succession. At 6 months, no significant difference in shrub, herb, and moss species composition or abundance was detected between the two study sites. Seventeen years after treatment, however, the Piceasitchensis (Bong.) Carr. site had much less vegetation cover and diversity than the Tsugaheterophylla (Raf.) Sarg. site. Overall response of most vascular species to thinning was

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Lei, Thomas. "Environmental preferences and constraints of Daphne laureola, an invasive shrub in western Canada." Canadian Journal of Forest Research 44, no. 11 (2014): 1462–67. http://dx.doi.org/10.1139/cjfr-2014-0261.

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Daphne laureola L. is an evergreen forest understory shrub native to the Mediterranean regions of Europe and North Africa that has invaded parts of western North America, including coastal British Columbia (BC) and the states of Washington and Oregon. It can form dense thickets that are likely to prevent the establishment and growth of native plants. Despite its expanding range in the west coast regions, not much is known about its environmental preferences and the ecophysiological attributes associated with its presence and distribution. A 2-year study conducted in Victoria, BC, found that D.

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Wolfe, Emily R., Stefanie Kautz, Sebastian L. Singleton, and Daniel J. Ballhorn. "Differences in foliar endophyte communities of red alder (Alnus rubra) exposed to varying air pollutant levels." Botany 96, no. 12 (2018): 825–35. http://dx.doi.org/10.1139/cjb-2018-0085.

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In the Pacific Northwest, Alnus rubra Bong. (red alder) is a common deciduous tree species especially prevalent in riparian corridors and disturbed sites, including metropolitan areas undergoing land use changes and development. Importantly, red alder is also considered a bioindicator for ozone pollution and, like all plants, harbors a diverse endophyte community that may interact with aerial pollutants. In this study, we surveyed foliar fungal endophyte communities (microfungi) in red alder leaves from the metropolitan area of Portland, Oregon, USA, using culture-based techniques, and found t

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Wheeler, E. A. "Growth patterns in vascular plants. Muhammad Iqbal (ed.), 480 pp., illus., 1994. Dioscorides Press, Portland, Oregon. ISBN 0-931146-26-7. Price: US$ 69.95." IAWA Journal 16, no. 3 (1995): 310–11. http://dx.doi.org/10.1163/22941932-90001417.

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Stoops, L. Renee. "Conference Review 8Th Annual Conference, International Phytotechnology Society,Putting Plants to Work, Where We Live, Labor, Breathe, and Play, September 13–16, 2011, Portland, Oregon, USA." International Journal of Phytoremediation 15, no. 9 (2013): 827–29. http://dx.doi.org/10.1080/15226514.2013.764676.

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Throop, Heather L. "The Nature of Plants: Habitats, Challenges, and Adaptations. By John Dawson and , Rob Lucas. Portland (Oregon): Timber Press. $39.95. 314 p; ill.; index. ISBN: 0‐88192‐675‐2. 2005." Quarterly Review of Biology 80, no. 4 (2005): 480. http://dx.doi.org/10.1086/501274.

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Ellison, Aaron M. "Carnivorous Plants of the United States and Canada. Second Edition.By Donald E Schnell. Portland (Oregon): Timber Press. $39.95. 468 p; ill.; index of plant names. ISBN: 0–88192–540–3. 2002." Quarterly Review of Biology 78, no. 1 (2003): 98. http://dx.doi.org/10.1086/377852.

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Dissertationen zum Thema "Understory plants – Oregon – Portland"

Copp, Sara Rose. "Community level impacts associated with the invasion of English ivy (Hedera spp.) in Forest Park: a look at the impacts of ivy on community composition and soil moisture." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/2024.

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Invasive species degrade ecosystems by altering natural processes and decreasing the abundance and diversity of native flora. Communities with major fluctuations in resource supply allow invasive species to exploit limiting resources making the community prone to invasion. In the Pacific Northwest, urban forests characterized with limited light and seasonally limited soil moisture are being dominated by nonnative English ivy (Hedera spp). Three observational studies were conducted in the Southern end of Forest Park within the Balch Creek Subwatershed in Portland, Oregon in order to understand

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Van, Winkle Jill Elise. "Informal Trails and the Spread of Invasive Species in Urban Natural Areas: Spatial Analysis of Informal Trails and their Effects on Understory Plant Communities in Forest Park, Portland, Oregon." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/1841.

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The risk of spread and establishment of invasive species to interior habitat within urban parks is of great concern to park managers and ecologists. Informal trails as a vector for this transmission are not well understood. To characterize effects of informal trails on understory plant communities, I conducted a study of the informal trail network in Forest Park, Portland, Oregon. The system of 382 informal trails was mapped and evaluated qualitatively, and from this population a systematic sample was selected for analysis. To identify hotspots of informal trail activity, showing the relations

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Addessi, Andrew David. "Urban Impacts to Forest Productivity, Soil Quality, and Canopy Structure in Forest Park, Portland, Oregon." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3881.

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Land use practices and exposure to low impact disturbances associated with an urban environment can alter forest structure and function. Past and ongoing research in Forest Park, a large urban forest in Portland, Oregon, suggests that mature mixed Douglas-fir (Psuedotsuga meziesii)-hardwood stands in the more urban end of the park lack a shade-tolerant conifer understory composed of the late successional conifer tree species, such western hemlock (Tsuga heterophylla) and western red-cedar (Thuja plicata). 5-year plot remeasurement data that characterizes productivity and mortality patterns did

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Kirkpatrick, Erin Jolene. "Green Mind Gray Yard: Micro Scale Assessment of Ecosystem Services." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/884.

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There is a spatial mismatch between the size of the area where people are living and the extent of land needed to ecologically support developed areas. More people are living in urban areas than any time in history, and the resources need to support cities have had to expand to try and meet the demands of increasing urban populations. However, areas of opportunity exist for urban areas to begin to positively contribute towards the available resources in a region. Because a large portion of urban areas is within private control, gaining a baseline understanding of how residents interact with ec

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Broshot, Nancy Ellen. "The Effects of Urbanization and Human Disturbance Upon Plant Community Structure and Bird Species Richness, Diversity, and Abundance in a Natural Forested Area (Forest Park) in Portland, Oregon." PDXScholar, 1999. https://pdxscholar.library.pdx.edu/open_access_etds/3962.

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The effects of urbanization and continual human disturbance on the plant and avian communities of Forest Park and forested lands surrounding Portland, Oregon, were studied. I examined characteristics of plant and avian communities at 25 sites, 24 which were in Forest Park and surrounding areas and one which was in the Ancient Forest Preserve (old-growth stand) northwest of Forest Park. Data were analyzed using multiple regression, ANOV A, and Bonferonni/Dunn. Seven variables were selected representing different urbanization gradients. An additional covariable coded for the old-growth stand, al

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Mcdonald, Shannon Lee. "Understory Diversity and Succession on Coarse Woody Debris in a Coastal, Old-growth Forest, Oregon." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/1045.

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This research examines the relationship between understory plant diversity and logs in a Pacific Northwest (PNW) Sitka spruce (Picea sitchensis)-western hemlock (Tsuga heterophylla) old-growth, coastal forest. These forests are renowned for their high forest productivity, frequent wind storms, and slow log decomposition rates that produce unmatched accumulations of coarse woody debris (CWD) yet few studies have examined the relationship between CWD and understory vegetation ecology. My research addressed this topic by comparing understory plant census data between paired fallen log and forest

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von, Behren Christa. "Composition and Dispersal Dynamics of Vegetation Communities in Urban Riparian Forests." PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4409.

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In urban riparian areas, vegetation composition may be affected by urban land use changes at both the stream reach and the watershed scale. Moreover, the mechanisms by which seeds disperse may be affected both by reduction in seed sources due to vegetation removal and by the urban stream syndrome that produces flashier hydrographs and incised channels. I hypothesized that vegetation communities with high cover of native and hydrophilic species would be found in watersheds with high forest cover, while more limited cover of these species would be found in highly developed watersheds. Additional

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Schlobohm, Trisha Leigh. "Creating a Learning Continuum: A Critical Look at the Intersection of Prior Knowledge, Outdoor Education, and Next Generation Science Standards Disciplinary Core Ideas and Practices." PDXScholar, 2016. http://pdxscholar.library.pdx.edu/open_access_etds/2749.

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Outdoor School is a cherished educational tradition in the Portland, OR region. This program's success is attributed to its presumed ability to positively impact affective and cognitive student outcomes. Residential programs such as Outdoor School are considered to be an important supplement to the classroom model of learning because they offer an authentic, contextually rich learning environment. References to relevant literature support the idea that student gains in affective and cognitive domains occur as a result of the multi-sensory, enjoyable, hands-on nature of outdoor learning. The sa

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Lange, Karen M. "Nutrient and tannin concentrations of shrub leaves in managed and unmanaged forests of the Oregon Coast Range : implications for herbivores /." 1998. http://hdl.handle.net/1957/10943.

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Mayrsohn, Cheryl. "Similarities in understory vegetation composition between unthinned, thinned and old-growth Douglas fir stands in western Oregon." Thesis, 1995. http://hdl.handle.net/1957/34684.

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Forest stands were studied to determine if old-growth forest structure could be mimicked in younger stands via overstory manipulation. Cover and species composition of understory plants were systematically sampled in sixteen thinned second-growth stands and sixteen adjacent unthinned second-growth Douglas fir (Pseudotsuga menziesii (Mirabel) Franco.) stands. The stands were thinned twenty-four to thirteen years ago. These were compared to seven nearby old-growth stands. Thinned and unthinned stands had matching elevations, aspect, and soils, yet differed primarily in management treatment. Leaf

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Bücher zum Thema "Understory plants – Oregon – Portland"

N, Gray Andrew, Garman, Steven L. (Steven Lee), 1955-, and Pacific Northwest Research Station (Portland, Or.), eds. Canopy structure on forest lands in western Oregon: Differences among forest types and stand ages. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2009.

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Meeting, Aquatic Plant Control Research Program (U S. Army Engineer Waterways Experiment Station). Proceedings, 22nd Annual Meeting, Aquatic Plant Control Research Program: 16-19 November 1987, Portland, Oregon. Environmental Laboratory U.S. Army Engineer Waterways Experiment Station, 1988.

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Waterpower '87 (1987 Portland, Or.). Waterpower '87: Proceedings of the International Conference on Hydropower, Portland, Oregon, August 19-21, 1987. American Society of Civil Engineers, 1988.

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International Topical Meeting on Safety of Thermal Reactors (1991 Portland, Or.). Proceedings of the International Topical Meeting on Safety of Thermal Reactors: Portland, Oregon, July 21-25, 1991. American Nuclear Society, 1991.

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Waterpower '87 (1987 Portland, Or.). Waterpower '87 abstracts: A collection of abstracts of papers presented at Waterpower '87, an international conference sponsored by the U.S. Army Corps of Engineers, North Pacific Division [and] Bonneville Power Administration, Portland, Oregon, August 19-21, 1987. American Society of Civil Engineers, 1987.

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Mayrsohn, Cheryl. Similarities in understory vegetation composition between unthinned, thinned and old-growth Douglas fir stands in western Oregon. 1995.

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Riegel, Gregg M. Understory competition for resources in Pinus ponderosa forests of northeastern Oregon. 1989.

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Lange, Karen M. Nutrient and tannin concentrations of shrub leaves in managed and unmanaged forests of the Oregon Coast Range: Implications for herbivores. 1998.

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Proceedings of the International Topical Meeting on Safety of Thermal Reactors, Portland, Oregon, July 21-25, 1991. Amer Nuclear Society, 1991.

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Konferenzberichte zum Thema "Understory plants – Oregon – Portland"

Claudio García, Reimar Carlesso, Francisco Vilaró, and Roberto Docampo. "Irrigation management of potato plants in Uruguay." In 2006 Portland, Oregon, July 9-12, 2006. American Society of Agricultural and Biological Engineers, 2006. http://dx.doi.org/10.13031/2013.21700.

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R. Vance Morey, Dennis L. Hatfield, Rod Sears, and Douglas G. Tiffany. "Characterization of Feed Streams and Emissions from Biomass Gasification/Combustion at Fuel Ethanol Plants." In 2006 Portland, Oregon, July 9-12, 2006. American Society of Agricultural and Biological Engineers, 2006. http://dx.doi.org/10.13031/2013.21180.

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Berichte der Organisationen zum Thema "Understory plants – Oregon – Portland"

Van Winkle, Jill. Informal Trails and the Spread of Invasive Species in Urban Natural Areas: Spatial Analysis of Informal Trails and their Effects on Understory Plant Communities in Forest Park, Portland, Oregon. Portland State University Library, 2000. http://dx.doi.org/10.15760/etd.1840.

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Wright, Kirsten. Collecting Plant Phenology Data In Imperiled Oregon White Oak Ecosystems: Analysis and Recommendations for Metro. Portland State University, 2020. http://dx.doi.org/10.15760/mem.64.

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Highly imperiled Oregon white oak ecosystems are a regional conservation priority of numerous organizations, including Oregon Metro, a regional government serving over one million people in the Portland area. Previously dominant systems in the Pacific Northwest, upland prairie and oak woodlands are now experiencing significant threat, with only 2% remaining in the Willamette Valley in small fragments (Hulse et al. 2002). These fragments are of high conservation value because of the rich biodiversity they support, including rare and endemic species, such as Delphinium leucophaeum (Oregon Depart

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