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- 419University of Alberta, Department of Biological Sciences
- 138Sawchuk, Matthew
- 81Mark A. Lewis
- 52Lewis, Mark A.
- 52Stockey, R.A.
- 23Wishart, D.S.
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Duabanga-like leaves from the Middle Eocene Princeton chert and comparative leaf histology of Lythraceae sensu lato
Download2004
Little, S.A., Keating, R.C., Stockey, R.A.
A permineralized lythraceous leaf type found in close association with fruits, stems, and roots of Decodon allenbyensis Cevallos- Ferriz et Stockey in the Middle Eocene Princeton chert of British Columbia, Canada, is described. Midribs have a prominent C-shaped midvein surrounded by sclerenchyma,...
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2018
University of Alberta, Department of Biological Sciences
This image is of a Durham Vial. This laboratory equipment is used in Introduction to Cell Biology: Biology 107 and MolecuLar Genetics and Heredity: Biology 207. This image was created as part of the University of Alberta OER image database project in Biological Sciences. Identifier 3005I.
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2020-01-01
TOM E. X. MILLER, AMY L. ANGERT, CARISSA D. BROWN, JULIE A. LEE-YAW, MARK LEWIS, FRITHJOF LUTSCHER, NATHAN G. MARCULIS, BRETT A. MELBOURNE, ALLISON K. SHAW, MARIANNA SZ}UCS, OLIVIA TABARES, TAKUJI USUI, CHRISTOPHERWEISS-LEHMAN, JENNIFER L. WILLIAMS
Understanding the movement of species’ ranges is a classic ecological problem that takes on urgency in this era of global change. Historically treated as a purely ecological process, range expansion is now understood to involve eco-evolutionary feedbacks due to spatial genetic structure that...
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Ecological applications of pheromone trapping of Malacosoma disstria and Choristoneura conflictana
Download2008
Abstract: The forest tent caterpillar, Malacosoma disstria Hubner (Lepidoptera: Lasiocampidae), and large aspen tortrix, Choristoneura conflictana (Walker) (Lepidoptera: Tortricidae), are important pests of trembling aspen, Populus tremuloides Michx. (Salicaceae), in western Canada. Populations...
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1995-01-01
Sherratt, J. A., Lewis, Mark A., Fowler, A. C.
Irregularities in observed population densities have traditionally been attributed to discretization of the underlying dynamics. We propose an alternative explanation by demonstrating the evolution of spatiotemporal chaos in reaction-diffusion models for predator-prey interactions. The chaos is...
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2003
Tonn, W.M., Katopodis, C., Jones, N.E., Scrimgeour, G.J.
We examined spatiotemporal variation in the physical, chemical, and biological characteristics of pristine streams that represent a range of conditions near Lac de Gras in the Barrenlands region of the Northwest Territories, Canada. Principal component analysis organized streams into four groups...
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1998
Abstract: Sporocarps of fungi belonging to ectomycorrhizal genera were collected between 1993 and 1997 at two sites at the upper elevational limit of the subalpine forest in montane Alberta. Host plants include Abies lasiocarpa, Picea engelmannii, Larix lyallii, Betula glandulosum, and Dryas and...
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Effect of age of the intermediate host Tribolium confusum (Coleoptera) on infection by Hymenolepis diminuta (Cestoda).
Download2008
A cross-sectional study of 27 cohorts of Tribolium confusum aged 2–78 wk was done to examine effects of host age on exposure to eggs of Hymenolepis diminuta under standardized conditions. Pre-exposure, fasting, and postexposure mortality were low, sex ratio was equal, and fecundity of hosts was...