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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Diversity and zoogeography of Brachycera (Diptera) in disjunct grasslands of the southern Yukon

Boucher, Stéphanie, 1974- January 1998 (has links)
The diversity and zoogeography of Diptera (Brachycera) of disjunct xeric grasslands in the southern Yukon were studied. Over 20,000 flies were collected representing 32 families and 213 species. In terms of abundance, the predacious guild dominated (54% of total specimens) due mostly to the family Chamaemyiidae which represented 45% of all specimens. In terms of diversity, the phytophagous and parasitoid guilds were dominant (25.5% of total species each). The most diverse families were Agromyzidae (32 species), Chloropidae (31 species), Tachinidae (23 species) and Pipunculidae (20 species). Thirty-four undescribed species were collected and 58 species were recorded for the first time in the Yukon. Zoogeographic analysis indicates that the Diptera fauna of these grasslands is dominated by widespread Nearctic or Holarctic species, but the fauna also includes southern grassland species with disjunct distributions, and species endemic to Beringia. The presence of endemic and disjunct species suggests that these grasslands were present in Beringia during the Wisconsinan and acted as a refugium for grassland Diptera.
2

Place identity, guides, and sustainable tourism in Canada's Yukon Territory

De la Barre, Suzanne. January 2009 (has links)
Thesis of (Ph.D.)--University of Alberta, 2009. / Title from pdf file main screen (viewed on September 14th, 2009). "Fall, 2009." At head of title: University of Alberta. A thesis submitted to the Faculty of Graduates Studies and Research in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Faculty of Physical Education and Recreation, University of Alberta. Includes bibliographical references.
3

Diversity and zoogeography of Brachycera (Diptera) in disjunct grasslands of the southern Yukon

Boucher, Stéphanie, 1974- January 1998 (has links)
No description available.
4

Petrology of quaternary alkaline lavas from the Alligator Lake volcanic complex, Yukon Territory, Canada

Eiché, Greg. January 1985 (has links)
No description available.
5

Petrology of quaternary alkaline lavas from the Alligator Lake volcanic complex, Yukon Territory, Canada

Eiché, Greg. January 1985 (has links)
No description available.
6

Shades of Green: the social nature of Yukon forests

Asselin, Jodie D Unknown Date
No description available.
7

Pattern, composition and resource selection of terrestrial vertebrates across the Yukon forest to tundra transition

Pretzlaw, Troy. January 2006 (has links)
Ecotones are gradients of change between expanses of similar species composition. These regions often mark co-occurring range limits for several species, and thus are ideal for elucidating ecological and biogeographical phenomena. The forest to tundra transition (FTT) is one of the world's most prominent ecotones, but remains poorly studied especially with regard to vertebrate species occurrence. Vertebrate diversity, ecological structure and resource selection were characterized across the Yukon FTT using diversity metrics, ordination, hierarchical clustering, and resource modeling. The FTT represents an abrupt drop in vertebrate species richness within the more gradual, continental scale diversity gradient. Despite the patchiness and complexity in vegetative structure over this ecotone, the terrestrial vertebrate community is divisible into boreal, taiga, and tundra compartments. Most species conform to resource associations reported closer to the core of their range, generating remarkably consistent habitat and species associations despite a complex patchwork of contrasting habitat types.
8

Pattern, composition and resource selection of terrestrial vertebrates across the Yukon forest to tundra transition

Pretzlaw, Troy. January 2006 (has links)
No description available.
9

Process and rates of development of talus slopes and protalus rock glaciers in the Ogilvie and Wernecke Mountains, central Yukon Territory.

Gray, James Telfer. January 1971 (has links)
No description available.
10

Gravity and temperature measurements on the Fox Glacier, Yukon

Crossley, David John January 1969 (has links)
During the summer of 1968 a gravity survey was conducted over the Fox* Glacier, Yukon Territory, for the purpose of finding ice depths. Choice of the Fox Glacier was as a result of its predicted surge, and the survey was part of a long-term analysis of the physical condition of the glacier. Although seismic sounding was attempted, the thinness of the glacier prevented successful results. Analysis of the gravity measurements indicated 88m as the maximum depth; comparison with depths from three drilled holes showed that the gravity results were not seriously in error. A small near-surface temperature program was completed and the results identify the Fox as a sub-polar glacier. *This is not an officially accepted name. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

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