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Full-Text Articles in Life Sciences
Near-Surface Soil Nitrogen And Vegetation Response To Invasive Emerald Ash Borer In Forested Black Ash Wetlands Of The Western Upper Peninsula, Michigan, Usa, Daniel A. Beyer
Dissertations, Master's Theses and Master's Reports
Invasive emerald ash borer (EAB) (Agrilus planipennis Fairmaire) poses an imminent threat to the structure and function of North American hardwood forests, particularly black ash (Fraxinus nigra Marshall), and alters the hydrologic and ecological services of their wetlands. Black ash trees regularly grow in seasonally saturated soils and are responsible for hydrologic regulation and nutrient cycling. In this study, a gradient of black ash wetlands impacted by EAB were monitored to assess vegetation changes and near-surface soil nitrogen availability. Vegetation community changes were intertwined with nitrogen cycle disturbances following EAB infestation. As black ash died and fell to …
The Interactive Effects Of Microtopography And Hydrology On Ground Layer Vegetation And Soil Gas Flux Responses To A Simulated Emerald Ash Borer Infestation In Black Ash Wetlands, Elisabeth Stimmel
Dissertations, Master's Theses and Master's Reports
Black ash (Fraxinus nigra Marshall) wetlands are at risk of significant ecological and functional changes due to the invasive emerald ash borer (EAB) (Agrilus planipennis Fairmaire (Coleoptera: Buprestidae)), which kills trees in the Fraxinus (ash) genus. Simulated EAB infestations consisting of girdle treatments and ash cut treatments have been implemented in black ash wetlands to study the impacts of black ash canopy dieoff in these systems. Initial findings include ground layer vegetation shifts and impacts to carbon dioxide (CO2) and methane (CH4) release from soils, but these factors and their interactions with microtopography in …