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Skip to Search Results- 8Biological Sciences, Department of
- 8Biological Sciences, Department of/Journal Articles (Biological Sciences)
- 3Cahill Lab of Experimental Plant Ecology
- 3Cahill Lab of Experimental Plant Ecology/Journal Articles (Cahill Lab)
- 2Roy Berg Kinsella Research Ranch
- 2Roy Berg Kinsella Research Ranch/Journal Articles (Kinsella Ranch)
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2009-01-01
Cahill, J. F., Mitchell, M. G. E., Hik, D. S.
We investigated whether plant interaction intensity in a subarctic-alpine meadow is important for determining community structure and species abundance. Using two common species as phytometers, we measured interaction intensity using a neighbor removal approach. Eight biotic and abiotic variables...
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Performance and stability of performance of spring wheat variety mixtures in organic and conventional management systems in western Canada
Download2009
O'Donovan, John T., Navabi, Alireza, Kaut, A. H. E. E., Spaner, Dean, Mason, Heather E.
Wheat (Triticum aestivum L.) variety mixtures represent a relatively unexplored avenue for maintaining and stabilizing yield for both organic and conventional producers. The present study examined the responses of three Canadian western red spring wheat varieties in sole crop and in variety...
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Density-Dependent Effects and the Regulation of Crucian Carp Populations in Single-Species Ponds
Download1994
Tonn, W. M., Holopainen, I. J., Paszkowski, C. A.
Crucian carp (Carassius carassius) is often the only fish species present in small ponds of northern Europe. Such populations are typically at high densities and consist primarily of small, relatively slender, and short-lived fish; populations in multispecies assemblages in lakes display opposite...
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2008-01-01
We examined whether the intense root competition in a rough fescue grassland plant community in central Alberta, Canada, was important in structuring plant species diversity or community composition. We measured competition intensity across gradients of species richness, evenness, and community...
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Light, wind, and touch influence leaf chemistry and rates of herbivory in Apocynum cannabinum (Apocynaceae)
Download2006-01-01
Cahill, J.F., Ingersoll, C.M., Niesenbaum, R.A.
Simply visiting and manipulating plants in a way consistent with measurement in typical ecological studies influences the amount of leaf herbivory experienced by some plant species. We examined the mechanistic basis for why Apocynum cannabinum is particularly responsive to such visitation and...
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2008
We examined whether the intense root competition in a rough fescue grassland plant community in central Alberta, Canada, was important in structuring plant species diversity or community composition. We measured competition intensity across gradients of species richness, evenness, and community...
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The effect of sex, size and habitat on the incidence of puncture wounds in the claws of the porcelain crab Petrolisthes cinctipes (Anomura: Porcellanidae)
Download2007
Many porcelain crabs have an unusual claw (cheliped) form that is broad, flat and thin. This seemingly flimsy form suggests claws may be used more for display than for feeding or aggressive interactions. However, in the flat-topped porcelain crab Petrolisthes cinctipes, one of the most abundant...
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Factors influencing size inequality in peatland black spruce and tamarack: Evidence from post-drainage release growth
Download1999
1 We used tree ring analysis to determine stem radius and thus examine size variation over time in two even-aged (approximately 40-year-old) mixed populations of black spruce and tamarack established on peatlands in a boreal forest. We also followed the response of one of these populations to...
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2004
Boyce, M. S., Fortin, D., Merrill, E. H.
Mammalian herbivores can carry out multiple tasks without interrupting food processing, but this possibility is not considered in existing foraging models. We develop a mechanistic functional response to account for herbivores' ability to search for their next food bite and walk away from...