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LiDAR Individual Tree Detection for Assessing Structurally Diverse Forest Landscapes
Contemporary forest management on public land incorporates a focus on restoration and maintenance of ecological functions through silvicultural manipulation of forest structure on a landscape scale. Incorporating reference conditions into restoration treatment planning and monitoring can improve treatment efficacy, but the ...
Study of the catalytic reactions of ethylene oligomerization in subcritical and supercritical media over a NiBEA catalyst
We report a study of the catalytic reactions of ethylene oligomerization over nickel impregnated in aluminum silicate using subcritical and supercritical media. We found the BET surface area decreases with increasing nickel loading, indicating the deposition of NiO particles in the catalyst surface. We compared the performance ...
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 ...
Impacts of Re-colonizing Gray Wolves on Mule Deer and White-tailed Deer in North-Central Washington
Previous research on gray wolves (Canis lupus) in protected landscapes demonstrates these large carnivores can have consumptive and non-consumptive effects on prey species which lead to top-down trophic cascades. However, much remains to be known about impacts of gray wolves on prey in managed landscapes as well as how these ...
The Effects of Different Harvest Intensities on the Distribution of Soil Phosphorus and Nutrient Stocks in a Brazilian Oxisol
Forest soils form an important reservoir in ecosystem nutrient and carbon budgets, which are crucial for sustained productivity of forests. Nutrient fluxes and transformations in forest soils are a result of a complex interchange between the atmosphere, plants, and soil. Consequently, soils are a critical source of plant ...
Creating Novel Soil Amendments Using Class A Biosolids
By blending Class A biosolids with organic and inorganic materials, thirteen unique soil amendments were created with a goal of developing a product able to access a wider market than unblended Class A biosolids. A set of criteria were developed to assess if the developed blends could be successful general-purpose soil ...
HISTORICAL DISTURBANCE AND RECENT MANAGEMENT FACTORS DRIVING QUERCUS GARRYANA VEGETATION COMMUNITIES IN THE PUGET SOUND LOWLANDS
Garry oak (Quercus garryana) ecosystems used to cover 111,000 hectares in the Puget Sound, yet currently occupy approximately 3% of this former land area. Today, most Garry oak systems are fragmented and remain outside of protected conservation areas, making them particularly prone to additional land development pressures. ...
Ecological interactions between Euphydryas editha larvae and their host plants
I examined ecological interactions between larvae of Euphydryas editha (Lepidoptera: Nymphalidae) and their host plants. These caterpillars, and the plants they eat, provide an intriguing system for studying several aspects of basic and applied ecology. In various chapters I focus on plant-mediated indirect effects, multi-trophic ...
Fire, Charcoal, and the Biogeochemistry of Carbon and Nitrogen in Pacific Northwest Forest Soils
The rain shadow forests of the Olympic peninsula represent a unique, mixed-severity fire regime class in the midst of a highly productive landscape where spatial heterogeneity of fire severity may have significant implications for below and aboveground post-fire recovery. The purpose of this study was to quantify the impacts ...
Breeding Ecology of Golden Eagles in Western Washington
Raptors breeding in novel environments must find sufficient food resources to survive and reproduce. Available prey and landscapes surrounding territories can influence aspects of parental care and reproductive output. I investigated the influence of prey size and landscape on parental care and territory occupancy, respectively, ...