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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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Ecological controls on net ecosystem productivity of a mesic arctic tundra under current and future climates
Download2011
Dimitrov, D. D., Grant, R. F., Lafleur, P. M., Humphreys, E. R.
Abstract: Changes in arctic C stocks with climate are thought to be caused by rising net primary productivity (NPP) during longer and warmer growing seasons, offset by rising heterotrophic respiration (Rh) in warmer and deeper soil active layers. In this study, we used the process model ecosys to...
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2013-01-01
McNickle, G. G., Deyholos, M. K., Cahill Jr, J. F.
Background Ecologists recognize that plants capture nitrogen in many chemical forms that include amino acids. Access to multiple nitrogen types in plant communities has been argued to enhance plant performance, access to nitrogen and alter ecological interactions in ways that may promote...
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Economic justice and free trade: An analysis of the libertarian foundations of the free market paradigm
Download1996-01-01
While liberal political theory tacitly governs the domestic policy concerning international trade advocated by influential analysts such as Professor Michael E. Porter of the Harvard Business School, libertarian political theory animates the international trading regime. This incongruity merits...
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Ecophysiological adaptations of black spruce (Picea mariana) and tamarack (Larix laricina) seedlings to flooding.
Download2004
Macdonald, S. Ellen, Islam, M. Anisul
Black spruce and tamarack are the predominant tree species in boreal peatlands. The effects of flooding on morphological and physiological responses were investigated in greenhouse grown (18 months old) black spruce (Picea mariana) and tamarack (Larix laricina) seedlings for 34 days. Flooding...