Large woody debris removal has been ongoing in the Fraser River Delta since the late 1800’s. I investigated how offshore winds and the absence of large wood may have contributed to the recession of the Sturgeon Bank Marsh. I suggest large wood increases marshland resilience and promotes new marsh establishment by attenuating wave energy, decreasing sediment mobilization, deterring herbivory, and promoting the establishment of vegetated islands from which the marsh can expand. I analyzed historical wind data for patterns in offshore wind duration and installed several pieces of large wood onto the tidal flats of the Sturgeon Bank. I developed a technique for anchoring wood in the intertidal and give my recommendations for further development. Finally, I conclude the recession of the Sturgeon Bank Marsh was the result of multiple interacting stressors and coin the term keystone structural element to describe the function of large wood within a foreshore marsh., large woody debris, keystone structural element, marsh recession, ecological restoration, wave sheltering, coastal marsh
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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.
Relationships between changing environmental variables and amphibian populations have been understudied. Yet, alterations to temperature and precipitation have been suggested as contributors to the decline of some pond-breeding species, such as the Oregon Spotted Frog (Rana pretiosa). R. pretiosa has been classified as the most endangered amphibian in Canada, yet the cause for its decline is unknown. Therefore, this paper examined associations between temperature and precipitation, and R. pretiosa population trends, using a 10-year data set from two breeding populations in the
Lower Mainland of British Columbia. Timing of oviposition was positively related to higher temperature and increased precipitation within both populations (p<0.05). No statistical relationship was determined between egg mass productivity and temperature or precipitation; however, this paper proposes that further research, consistent protocols and longer study periods, is necessary in order to determine environmental variables as possible predictors of population success. This paper recommends the evaluation of breeding success through survivorship studies, as such methods provide insight into
productivity as the primary determinant for population recruitment. Further, ecological restoration efforts can be implemented to help ameliorate negative consequences climate change poses on reproductive success., amphibian, climate change, conservation, ecological restoration, endangered, population dynamics, population monitoring, survivorship