This decommissioned ERA site remains active temporarily to support our final migration steps to https://ualberta.scholaris.ca, ERA's new home. All new collections and items, including Spring 2025 theses, are at that site. For assistance, please contact erahelp@ualberta.ca.
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Effects of Changing Climate on Interactions Among Mountain Pine Beetle, Host Tree, and Microorganisms
DownloadFall 2024
Environmental factors such as elevated levels of CO2 and O3 are increasingly affecting forest trees globally. Changes in climate have led to shifts in the geographic distribution of pests and pathogens associated with forests, with predictions of more native and invasive pests in the future. In...
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Fall 2010
Neotyphodium are fungal endosymbionts of grasses that reproduce asexually by infecting the host’s seed. This relationship has traditionally been considered mutualistic, with the fungus improving host fitness by alleviating important stresses. To determine the importance of biotic and abiotic...
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Fall 2017
Bacteria of the genus Lactobacillus can be found associated with plants, insects and vertebrate hosts, and their lifestyle can range from free-living to strictly host specific. Of the lactobacilli associated with vertebrates, the lifestyle of L. reuteri is particularly well understood. The...
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Physiological, ecological and environmental factors that predispose trees, stands and landscapes to infestation by tree-killing Dendroctonus beetles
DownloadSpring 2013
In the last century the frequency and severity of outbreaks of tree-killing Dendroctonus beetles (Coleoptera: Curculionidae) have increased. Small-scale drivers within trees likely drive outbreak dynamics across landscapes. At a small scale, variation in carbohydrate availability within the stems...
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The Effect of Snail-Associated Chaetogaster (Annelida: Naididae) on Host Behaviour and Fitness.
DownloadFall 2023
Members of the genus Chaetogaster (Annelida: Clitellata: Naididae) are small oligochaete worms found in freshwater habitats around the world. Most are free living predators or omnivores, but members of one species group are symbionts of molluscs, particularly snails. Despite being a common...
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Unique cellular interactions between the obligate intracellular bacteria Wolbachia pipientis and its insect host
DownloadFall 2011
Wolbachia are maternally inherited obligate intracellular bacteria found in arthropods, where they induce feminization, male-killing, parthenogenesis, and cytoplasmic incompatibility (CI). CI is conditional male sterility, in which Wolbachia-infected males successfully mate with infected females,...