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2018-01-01

University of Alberta, Department of Biological Sciences

This image is of a Glass Spreader. 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 3003I.

2018-01-01

University of Alberta, Department of Biological Sciences

This image is part of a series displaying proper streaking and spreading laboratory techniques. This image illustrates how to spread a plate on a turntable, while holding the petri dish lid open at a 45 degree angle to ensure proper aseptic technique. This laboratory technique is taught in...

2018-01-01

University of Alberta, Department of Biological Sciences

This image is part of a series displaying proper streaking and spreading laboratory techniques. This image illustrates how to spread a plate while holding the petri dish lid open at a 45 degree angle to ensure proper aseptic technique. This laboratory technique is taught in Introduction to Cell...

2002-01-01

Lewis, Mark A., Bingtuan Li, Hans F. Weinberger

 One crucial measure of a species' invasiveness is the rate at which it spreads into a competitor's environment. A heuristic spread rate formula for a spatially explicit, two-species competition model relies on `linear determinacy' which equates spread rate in the full nonlinear model with spread...

2021-07-06

Jingjing Xu, Evelyn H. Merrill, Mark A. Lewis

Chronic wasting disease (CWD) is a fatal disease of cervid species that continues to spread across North America and now in Europe. It poses a threat to cervid populations and the local ecological and economic communities that depend on them. Although empirical studies have shown that host home...

2012-01-01

Mark A. Lewis, Bingtuan Li

How growth, mortality, and dispersal in a species affect the species' spread and persistence constitutes a central problem in spatial ecology. We propose impulsive reaction-diffusion equation models for species with distinct repro- ductive and dispersal stages. These models can describe a...

2007

Smith, D. W., Anderson, D. P., Ives, A. R., Turner, M. G., Beyer, H. L., Boyce, M. S., Forester, J. D., Fortin, D.

Explaining and predicting animal movement in heterogeneous landscapes remains challenging. This is in part because movement paths often include a series of short, localized displacements separated by longer-distance forays. This multiphasic movement behavior reflects the complex response of an...

2016-01-01

Auger-Méthé, Marie, Field, Chris, Albertsen, Christopher M., Derocher, Andrew E., Lewis, Mark A., Jonsen, Ian D., Mills Flemming, Joanna

State-space models (SSMs) are increasingly used in ecology to model time-series such as animal movement paths and population dynamics. This type of hierarchical model is often structured to account for two levels of variability: biological stochasticity and measurement error. SSMs are flexible....

2014-01-01

Potts, Jonathan R., Mokross, Karl, Stouffer, Philip C., Lewis, Mark A.

Understanding the behavioral decisions behind animal movement and space use patterns is a key challenge for behavioral ecology. Tools to quantify these patterns from movement and animal–habitat interactions are vital for transforming ecology into a predictive science. This is particularly...

2011

Lewis, M. A., Muirhead, J. R., Potapov, A., Lele, S. R.

Freshwater aquatic systems in North America are being invaded by many different species, ranging from fish, mollusks, cladocerans to various bacteria and viruses. These invasions have serious ecological and economic impacts. Human activities such as recreational boating are an important pathway...