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Skip to Search Results- 19Population dynamics
- 4Allee effects
- 4Climate change
- 3Parkinson disease
- 2Biological invasions
- 2Dispersal
- 5Lewis, Mark A.
- 4Mark A. Lewis
- 2Roland, J.
- 1Andrew E. Derocher
- 1Armstrong, P.
- 1Bampfylde, Caroline J.
- 12Biological Sciences, Department of
- 11Biological Sciences, Department of/Journal Articles (Biological Sciences)
- 8Graduate and Postdoctoral Studies (GPS), Faculty of
- 8Graduate and Postdoctoral Studies (GPS), Faculty of/Theses and Dissertations
- 6Mathematical and Statistical Sciences, Department of
- 6Mathematical and Statistical Sciences, Department of/Research Publications (Mathematical and Statistical Sciences)
- 2Boutin, Stan (Biological Sciences)
- 1Bayne, Erin (Biological Sciences)/ Villard, Marc-André (Biologie; Université de Moncton)
- 1Boonstra, Rudy (Biological Sciences, University of Toronto Scarborough)
- 1Brown, Cary ( Occupational Therapy)
- 1Langor, David W (Canadian Forest Services)
- 1Lewis, Mark (Mathematical and Statistical Sciences)
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A mechanistic model for understanding invasions: using the environment as a predictor of population success
Download2011-01-01
DiBacco, C., Lewis, Mark A., Strasser, C. A.
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...
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A Pilot Study to Determine the Consistency of Simultaneous Sleep Actigraphy Measurements Comparing All Four Limbs of Patients with Parkinson Disease
DownloadFall 2018
Background: Wrist actigraphy is a form of objective sleep measurement that has gained a central role in research and clinical settings. Although actigraph data is available for sleep disorders concerning medical and neurobehavioral disorders, the literature identifies that sensitivity of...
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2021-01-01
Mariana Nagy-Reis, Jody R. Reimer, Mark A. Lewis, William F. Jensen, Mark S. Boyce
Models of population dynamics are a central piece for harvest management, allowing managers to evaluate alternative strategies and to identify uncertainty. Here we present a density-dependent population dynamics model that can be used in conjunction with adaptive management to optimize big game...
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Are the “ seeds ” of spatial variation in cyclic dynamics apparent in spatially-replicated short time-series ? An example from the forest tent caterpillar
Download2005
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...
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Biology and integrated management of wheat stem sawfly, cephus cinctus norton (hymenoptera: cephidae), with a discussion of needs for future research
Download2011
Dosdall, Lloyd M., Spaner, Dean M., Cárcamo, Hector A., Beres, Brian L.
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,...
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2009-01-01
Bampfylde, Caroline J., Jerde, Christopher L., Lewis, Mark A.
We formalize the establishment process for a sexual, semelparous organism through the use of hierarchical probability modeling from parameters of survival, probability of being female, probability of being fertilized, and expected fecundity.We show how to calculate the expected per capita growth...
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Coupling mountain pine beetle and forest population dynamics predicts transient outbreaks that are likely to increase in number with climate change
Download2023-09-27
Mountain pine beetle (MPB) in Canada have spread well beyond their historical range. Accurate modelling of the long-term dynamics of MPB is critical for assessing the risk of further expansion and informing management strategies, particularly in the context of climate change and variable forest...
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1996-01-01
Mark Kot, Mark A. Lewis, P. van den Driessch
Models that describe the spread of invading organisms often assume that the dispersal distances of propagules are normally distributed. In contrast, measured dispersal curves are typically leptokurtic, not normal. In this paper, we consider a class of models, integrodifference equations, that...
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Effects of climate and forest structure on duration of forest tent caterpillar outbreaks across central Ontario, Canada
Download1998
Cooke, B., Roland, J., Mackey, B. G.
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...
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2014
Lewis, M.A., Derocher, A.E., Molnár, P.K.
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...