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Bioremediation has gained traction for its sustainable principles. Although, advancements in effectiveness are still needed to enable widespread application. This research has two major components. First, priming fungi could prove to be a useful tool to increase efficiency of white-rot fungi when used to bioremediate petroleum hydrocarbons contaminated soil. This study evaluated T. versicolor colonized in two substrates to test this theory. TPH was extracted from the soils using hexane shaking method, and measured on a CG-MS. The study results were not conclusive, and more research should be conducted to determine if priming white-rot fungi can increase the effectiveness of degradation of TPH in contaminated soils. Second, historical and unethical oil production in Ecuador has left an environmental and human health disaster. The goal of this study was to produce a high-level bioremediation plan that can be used and amended for site specific applications in Ecuador.
Reed canarygrass (Phalaris arundinacea) is an invasive grass common in wetlands and riparian areas throughout the Pacific Northwest. It is highly adaptable and resistant to many control methods, but is vulnerable to shading. We sought to control reed canarygrass by establishing desirable native shrubs to overtop and shade it. Plots were rototilled, mulched, live-staked, and monitored for 2-6 growing seasons. We tested 1) effective planting densities by live-staking hardhack (Spiraea douglasii) at 50, 30, and 15 cm spacing, 2) relative species performance by planting hardhack, red-osier dogwood (Cornus sericea), and thimbleberry (Rubus parviflorus), all at 30 cm densities, and 3) alternative site preparation methods by using cardboard mulch or excavating the top 20 cm of topsoil. Higher planting density significantly reduced reed canarygrass cover and biomass. Both hardhack and red-osier dogwood successfully suppressed reed canarygrass, though thimbleberry did not. No significant differences between site preparation methods were observed., reed canarygrass, Phalaris arundinacea, invasive species management, live staking, planting density, Spiraea douglasii