SearchSkip to Search Results
- 5Biological Sciences, Department of
- 5Graduate Studies and Research, Faculty of
- 5Graduate Studies and Research, Faculty of/Theses and Dissertations
- 4Biological Sciences, Department of/Journal Articles (Biological Sciences)
- 2Nursing, Faculty of
- 1Agricultural, Food and Nutritional Science, Department of
A mechanistic model for understanding invasions: using the environment as a predictor of population successDownload
Aim We set out to develop a temperature-and salinity-dependent mechanistic population model for copepods that can be used to understand the role of environmental parameters in population growth or decline. Models are an important tool for understanding the dynamics of invasive species; our model...
Are the “ seeds ” of spatial variation in cyclic dynamics apparent in spatially-replicated short time-series ? An example from the forest tent caterpillarDownload
Variation in the pattern of dynamics of the forest tent caterpillar was assessed over a 13-year interval of population collapse and increase among 68 sites within a 420 km2 region. Patterns of population change were compared with the level of forest fragmentation among sites, and interpreted in...
Biology and integrated management of wheat stem sawfly, cephus cinctus norton (hymenoptera: cephidae), with a discussion of needs for future researchDownload
The wheat stem sawfly, Cephus cinctus Norton (Hymenoptera: Cephidae), is historically one of the most important economic insect pests in the northern Great Plains of North America. Within this geographical region, the areas subjected to greatest attack are southern Alberta and Saskatchewan,...
Effects of climate and forest structure on duration of forest tent caterpillar outbreaks across central Ontario, CanadaDownload
Abstract: We examined the effect of forest structure and climate enlarge-scale and long-term patterns of outbreaks of forest tent caterpillar, Malacosoma disstria Hbn., across central Ontario. This was done using previously published data on outbreak duration and forest heterogeneity, combined...
Allee effects are an important component in the population dynamics of numerous species. Accounting for these Allee effects in population viability analyses generally requires estimates of low-density population growth rates, but such data are unavailable for most species and particularly...
For some salmon populations, the individual and population effects of sea lice (Lepeophtheirus salmonis) transmission from sea cage salmon farms is probably mediated by predation, which is a primary natural source of mortality of juvenile salmon. We examined how sea lice infestation affects...
Interactions between the forest tent caterpillar (Malacosoma disstria Hubner) and its natural enemies: the effects of forest composition and implications for outbreak spreadDownload
Forest tent caterpillar (Malacosoma disstria Hübner; FTC), a major defoliator of aspen trees, occupies both aspen and mixedwood forest stands in Alberta’s boreal forest. Forest stand composition could influence the spatial pattern of FTC outbreaks if mortality from natural enemies differs...
Interactions between the mountain pine beetle (Dendroctonus ponderosae Hopkins) and whitebark pine (Pinus albicaulis Engelmann)Download
I compared life history traits between mountain pine beetles (MPB) utilizing whitebark pine and lodgepole pine to better understand how host use could affect MPB impact in the Rocky Mountains of Alberta, Canada. Neither host was obviously better in terms of quality for or susceptibility to the...
Local and regional demography in a migratory forest songbird and effects of forest management intensityDownload
The numerical response of forest birds to habitat alteration has been well documented in North America, but the underlying demographic processes driving these changes remain largely unknown. Among species sensitive to such alterations, the Ovenbird (Seiurus aurocapilla) shows one of the largest...