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Now showing items 31-40 of 90
Try it with fire and lime: phytochemical responses to prescribed fire, soil amendments, and simulated herbivory
Phytogenic defensive compounds mediate important multitrophic interactions in terrestrial ecosystems, yet we have limited understanding of how the methods used to restore and maintain degraded ecosystems influence subsequent ecosystem chemical ecology. To elucidate the chemical ecology of applied ecological restoration ...
INVESTIGATING THE EFFECTS OF URBANIZATION ON COUGAR FORAGING ECOLOGY ALONG THE WILDLAND-URBAN GRADIENT OF WESTERN WASHINGTON
Humans have historically altered ecosystem structure through landscape manipulation, leaving “remnants,” or refuge patches of suitable habitat amidst inhospitable terrain. Large carnivores are especially vulnerable to such habitat modification because they tend to have low population densities and reproductive rates as well ...
Temporal and spatial variability in climate-growth response of mountain hemlock at treeline
Climate-growth relationships in treeline forests are particularly informative because they represent the upper limit of a species range where growth is often especially sensitive to climatic variation. Radial growth response to climatic variables typically ranges from energy-limited to water-limited. In the Pacific Northwest ...
Analysis of the Potential for Diazotrophic Endophytes to Increase Efficiency of Bioenergy Crop Production: Growth promotion effects of the endophytes isolated from Populus trichocarpa and Salix sitchensis
(2013-04-17)
<bold>Analysis of the Potential for Diazotrophic Endophytes to Increase Efficiency of Bioenergy Crop Production: Growth promotion effects of the endophytes isolated from Populus trichocarpa and Salix sitchensis</bold> Jenny L. Knoth Chair of the Supervisory Committee: Associate Professor, Dr. Sharon L. Doty School of Environmental ...
Relationships between fine root productivity and aboveground forest metrics
(2013-11-14)
Understanding pools and fluxes of belowground living plant C in most ecosystems is a global priority (Clark et al. 2001). There is a pressing need for studies that address the variability of fine roots and to accurately describe the causes for variability of belowground plant C. This study addressed variability in fine root ...
Riparian Vegetation Structure and Composition in the Fire-Prone Ecosystem of Eastern Washington
(2013-11-14)
The objectives of this study were to compare riparian and upland areas, summarize the range of vegetation conditions present in the second half of the 20th century, and correlate vegetation with processes on the landscape. Matching research to management, the spatial extent of the study was the area managed by the Tapash ...
Quantifying vertical and horizontal stand structure using terrestrial LiDAR in Pacific Northwest forests
(2014-04-30)
Abstract Quantifying vertical and horizontal stand structure using terrestrial LiDAR in Pacific Northwest forests Alexandra Kazakova Chair of Supervisory Committee: Dr. L. Monika Moskal School of Environmental and Forest Science Stand level spatial distribution is a fundamental part of forest structure that influences many ...
Effects of Soil Chemistry, Niche Partitioning, and Competitive Exclusion on the Ectomycorrhizal Community Composition of Red Alder (Alnus rubra)
(2013-04-17)
There have been few studies of ectomycorrhizal fungal (EMF) communities in alder forests. The effects of spatial variability, competition, and environmental gradients on EMF community composition have seldom been investigated in sufficient depth to tease out more subtle impacts, particularly in field settings. In an exploratory ...
Modeling habitat suitability of Pinus densiflora in response to climate change in the Korean peninsula and East Asia
(2013-02-25)
The current and future climate suitability of Pinus densiflora in the Korean peninsula, Japan Isles, and parts of northen China was modeled using Random Forest predictors. Pinus densiflora is among the tree species with highest conservation priorities for its historical and cultural importance but distribution of the species ...
Challenges and Opportunities for the Development of a Sustainable Forest Sector in the Russian Far East
(2014-02-24)
Twenty-three percent of global forests are contained within the Russian Federation's nine time zones, which is more than the combined forest area of Canada and Brazil. Despite the fact that Russia contains the largest area of natural forests in the world, its current share in the trade of world forest products is below 4 ...