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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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Paleozoic Seed Ferns: Heterangium kentuckyensis sp. nov., from the Upper Carboniferous of North America.
Download1987
Stockey, R.A., Pigg, K.B., Taylor, T.N.
Heterangium kentuckeyensis sp. nov. is described from Lower/Middle Pennsylvanian sediments of eastern Kentucky, based on permineralized stems, petioles, frond members, laminar foliage, and roots, including several organs in attachment. Stems 2.2 to 5.8 mm in diameter are known in several...
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Paralygodium vancouverensis sp. nov. (Schizaeaceae), additional evidence for filicalean diversity in the Paleogene of North America.
Download2006
Stockey, R.A., Beard, G., Trivett, M.L., Rothwell, G.W.
Several fertile pinnules with abaxially borne sporangia have been discovered in calcareous marine nodules from the Middle or Late Eocene Appian Way locality on the east coast of Vancouver Island, British Columbia, Canada. Fertile pinnules are attached in groups of two or three. They are deeply...
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2015-01-01
Peacock, Stephanie J., Krkošek, Martin, Bateman, Andrew W., Lewis, Mark A.
There is an increasing realization of the diverse mechanisms by which parasites and pathogens influence the dynamics of host populations and communities. In multi‐host systems, parasites may mediate food web dynamics with unexpected outcomes for host populations. Models have been used to explore...
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1997
Lafferty, K.D., Shostak, A.W., Bush, A.O., Lotz, J.M.
W: e consider 27 populationa nd communityt erms used frequentlyb y parasitologistsw hen describingt he ecology of parasites. We provide suggestions for various terms in an attempt to foster consistent use and to make terms used in parasite ecology easier to interpret for those who study...
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1994
Veit, R. R., Banks, J. E., Holmes, E. E., Lewis, M. A.
Most of the fundamental elements of ecology, ranging from individual behavior to species abundance, diversity, and population dynamics, exhibit spatial variation. Partial differential equation models provide a means of melding organism movement with population processes and have been used...
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2018-01-01
University of Alberta, Department of Biological Sciences
This image is part of a series displaying key features of pastuer pipetting. This image illustrates a 5 ¾ inch pasteur pipette without a bulb. This laboratory equipment is used in Introduction to Cell Biology: Biology 107 and Molecular Genetics and Heredity: Biology 207. This image was created...
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2018-01-01
University of Alberta, Department of Biological Sciences
This image is part of a series displaying key features of pastuer pipetting. This image illustrates a 1mL pasteur pipette bulb. 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...
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2018-01-01
University of Alberta, Department of Biological Sciences
This image is part of a series displaying key features of pastuer pipetting. This image illustrates a 5 ¾ inch pasteur pipette with a 1mL bulb. This laboratory equipment is used in Introduction to Cell Biology: Biology 107 and Molecular Genetics and Heredity: Biology 207. This image was created...
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2018-01-01
University of Alberta, Department of Biological Sciences
This image is part of a series illustrating proper laboratory pastuer pipetting technique. This image demonstrates the process of drawing up liquid into the pastuer pipette by squeezing the bulb. This technique is taught in Introduction to Cell Biology: Biology 107 and Molecular Genetics and...