Artykuły w czasopismach: „Yukon”

1

Grigorieva, Elena. "Yukon". США ܀ Канада: Экономика, политика, культура, nr 8 (2018): 118–27. http://dx.doi.org/10.31857/s032120680000363-3.

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Smith, Jeanette M. "Yukon". JAMA 314, nr 10 (8.09.2015): 976. http://dx.doi.org/10.1001/jama.2014.11965.

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Kanagasabai, L. "Tangible Power Loss Dwindling by Canadian Yukon Cougar Optimization Algorithm". Herald of the Bauman Moscow State Technical University. Series Natural Sciences, nr 5 (104) (październik 2022): 16–30. http://dx.doi.org/10.18698/1812-3368-2022-5-16-30.

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In this paper Canadian Yukon Cougar Optimization Algorithm is applied to solve the power loss lessening problem. Natural deeds of Canadian Yukon Cougar are imitated to model the Canadian Yukon Cougar optimization algorithm. Both male and female Canadian Yukon Cougar switch their positions with reference to the conditions. In the initial population superiority and Migrant classification are done. For each Canadian Yukon Cougar fitness value computed. For superiority matured male Canadian Yukon Cougar fight with other male Canadian Yukon Cougars. Succeeded male will be dominant and defeated male Canadian Yukon Cougars will become as Migrant Canadian Yukon Cougars. In Canadian Yukon Cougar population balance will be there at end of iterations, the amount of existing Canadian Yukon Cougar will be controlled. With reference to the Utmost allowed number of every gender in Migrant Canadian Yukon Cougar; the smallest amount fitness value possessed by Migrant Canadian Yukon Cougar will be removed. Rightfulness of the Canadian Yukon Cougar Optimization Algorithm is corroborated in IEEE 30 bus system (with and devoid of L-index). Actual power loss lessening is reached. Proportion of actual power loss lessening is augmented

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4

Croft, James. "Whitehorse, Yukon". Raven: A Journal of Vexillology 18 (2011): 217–18. http://dx.doi.org/10.5840/raven201118109.

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Croft, James. "Carmacks, Yukon". Raven: A Journal of Vexillology 18 (2011): 28–29. http://dx.doi.org/10.5840/raven20111819.

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Croft, James. "Dawson, Yukon". Raven: A Journal of Vexillology 18 (2011): 42–43. http://dx.doi.org/10.5840/raven20111826.

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Minton, Helena. "Yukon Haunting". Women's Review of Books 15, nr 3 (grudzień 1997): 22. http://dx.doi.org/10.2307/4022830.

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Alpert, Mark. "Yukon Gold". Scientific American 282, nr 6 (czerwiec 2000): 32. http://dx.doi.org/10.1038/scientificamerican0600-32c.

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Diane Simmons. "Yukon River". Missouri Review 33, nr 1 (2010): 136–51. http://dx.doi.org/10.1353/mis.0.0209.

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Olson, Kenneth R., i James M. Lang. "Sediment Delivery by the Yukon River to the Yukon Flats, Yukon Delta and the Bering Sea". Open Journal of Soil Science 10, nr 09 (2020): 410–42. http://dx.doi.org/10.4236/ojss.2020.109022.

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Jung, Thomas S., i Philip J. Merchant. "First Confirmation of Cougar, Puma concolor, in the Yukon". Canadian Field-Naturalist 119, nr 4 (1.10.2005): 580. http://dx.doi.org/10.22621/cfn.v119i4.192.

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Cougar (Puma concolor) have been reported from the Yukon as early as 1944. Despite many sightings, no indisputable, physical evidence of Cougar being present in the Yukon had been obtained. Here, we report on the first. In November 2000, a specimen was secured from near Watson Lake, in southeastern Yukon. Whether this specimen, and the numerous sighting records, are indicative of a low-density breeding population in the Yukon, or represent transients, is unknown.

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Kim Zapf, Michael, i Bob Cole. "Yukon Restitution Study". Canadian Journal of Criminology 27, nr 4 (październik 1985): 477–90. http://dx.doi.org/10.3138/cjcrim.27.4.477.

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Croft, James. "Watson Lake, Yukon". Raven: A Journal of Vexillology 18 (2011): 215–16. http://dx.doi.org/10.5840/raven201118108.

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Croft, James. "Haines Junction, Yukon". Raven: A Journal of Vexillology 18 (2011): 65–66. http://dx.doi.org/10.5840/raven20111836.

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Macdonald, Francis A., Mark D. Schmitz, Justin V. Strauss, Galen P. Halverson, Timothy M. Gibson, Athena Eyster, Grant Cox, Peter Mamrol i James L. Crowley. "Cryogenian of Yukon". Precambrian Research 319 (grudzień 2018): 114–43. http://dx.doi.org/10.1016/j.precamres.2017.08.015.

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Winterstein, Mark, Teresa N. Hollingsworth i Carolyn Parker. "A Range Extension for Carex sartwellii in Interior Alaska". Canadian Field-Naturalist 130, nr 3 (30.11.2016): 191. http://dx.doi.org/10.22621/cfn.v130i3.1878.

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Our documentation of Sartwell’s Sedge, Carex sartwellii, on nine shrinking lakes during fieldwork in the central Yukon Flats, Alaska, represents a range extension for this species. Previously, its range extended as far northwest as Yukon, Canada, with a reported, but lost collection, from Alaska in 1895. Two earlier collections from the Yukon Flats have been verified; one was misidentified as Carex praegracilis until 2007. Carex sartwellii’s assumed absence from Alaska and Yukon flora, misidentification of an earlier collection, and the remoteness of the Yukon Flats may have contributed to the rarity of its collection. In Alaska this species is morphologically similar to C. praegracilis, but can be distinguished using traits of the perigynia, leaf sheaths, and the production of true vegetative culms.

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Slough, Brian G., i Thomas S. Jung. "Diversity and Distribution of the Terrestrial Mammals of the Yukon Territory: A Review". Canadian Field-Naturalist 121, nr 2 (1.04.2007): 119. http://dx.doi.org/10.22621/cfn.v121i2.434.

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The diversity and distribution of the terrestrial mammals of the Yukon has not been systematically reviewed since 1975, a time when the occurrences of many species were not well known. Since then, single species and community studies, biological collections and expert observations have increased our knowledge of the land mammals of the Yukon. Taxonomic studies have resulted in some additional species. We provide an update on the diversity and distribution of recent land mammals of the Yukon, including previously unreported range extensions, and include a revised checklist. Research in adjoining jurisdictions has contributed more hypothetical species for the Yukon. The mammalian fauna of the Yukon is in a relatively dynamic state, and human-induced changes, particularly climate warming, will undoubtedly influence mammalian diversity and distributions in the coming decades.

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Gauthier, David A., i Richard F. Farnell. "Comparison of caribou physical characteristics from Yukon and neighboring caribou herds". Rangifer 6, nr 2 (1.06.1986): 131. http://dx.doi.org/10.7557/2.6.2.637.

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Data on seven external body measurements of caribou from six woodland and two barren-ground caribou herds from Yukon, Alaska, Alberta and British Columbia were compared. Comparisons between females in the fall and winter and mature males in the fall revealed that (1) barren-ground Porcupine caribou were consistently smaller than caribou from other herds, (2) British Columbia and Alberta caribou tended to be larger than Yukon caribou, or the Alaskan caribou studied, (3) central Yukon caribou were intermediate in body size, (4) no difference was found between Yukon «mountain» and «woodland» type caribou in body size, and (5) the barren-ground Fortymile caribou were more similar in physical characteristics to Yukon woodland or mountain caribou than to those of the barren-ground Porcupine herd. These data support Banfield's (1961) view of a gradient of decreasing physical size from the northern British Columbia — Alberta herds through the Yukon mountain or woodland herds to the northern barren-ground herds.

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Jung, Thomas S., Amy M. Runck, David W. Nagorsen, Brian G. Slough i Todd Powell. "First Records of the Southern Red-backed Vole, Myodes gapperi, in the Yukon". Canadian Field-Naturalist 120, nr 3 (1.07.2006): 331. http://dx.doi.org/10.22621/cfn.v120i3.324.

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Twenty Southern Red-backed Voles, Myodes gapperi, were collected in July 2004 in the LaBiche River valley of southeastern Yukon. Specimens were identified using morphological characteristics and analysis of cytochrome b gene sequences. These are the first records of this species in the Yukon. No Northern Red-backed Voles, M. rutilus, were collected and it is not known whether the two species are sympatric or parapatric in the Yukon. Further survey work is needed in southeastern Yukon to better delineate the extent of the northwestern range of this species and the extent, if any, of introgression with M. rutilus.

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Moschopedis, Eric. "Bubonic Tourist and Yukon Arts Centre Lay Some Yukon PIPE: Project History". Canadian Theatre Review 126 (marzec 2006): 88–91. http://dx.doi.org/10.3138/ctr.126.018.

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During the summer of 2005, Calgary’s Bubonic Tourist was commissioned by Yukon Arts Centre executive director Chris Dray to workshop and facilitate a group of eight emerging artists in Whitehorse. The objective was to create community through performance by providing Yukon artists with tools for creating original site-specific performance and by curating a Yukon PIPE (Performance in Peculiar Environments) Festival.

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Huscroft, Crystal A., Brent C. Ward, René W. Barendregt, Lionel E. Jackson Jr. i Neil D. Opdyke. "Pleistocene volcanic damming of Yukon River and the maximum age of the Reid Glaciation, west-central Yukon". Canadian Journal of Earth Sciences 41, nr 2 (1.02.2004): 151–64. http://dx.doi.org/10.1139/e03-098.

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Stratigraphic, paleomagnetic, and radioisotope investigations of the Selkirk Volcanic Group have identified a new eruptive period and constrained the age of the Reid Glaciation, the most extensive middle Pleistocene cordilleran advance recognized in central Yukon. Downstream from Fort Selkirk, a complex of valley-filling compound pahoehoe basalt flows and pillow basalt is exposed for 10 km along the Yukon River and is overlain by outwash deposited during the Reid Glaciation. The flows have an 40Ar/39Ar age of 311 ± 32 ka. This age is consistent with the normal magnetization of the flows and their termination below the level of the contemporary Yukon River flood plain. Taken with the ca. 190 ka Sheep Creek tephra, which overlies Reid drift elsewhere in Yukon Territory, the Reid Glaciation is constrained to oxygen isotope stage 8, not stage 6 as previously thought. The presence of thick foreset-bedded pillow breccia units intercalated with the subaerial flows indicates that this eruption caused damming of the Yukon River. Reevaluation of the stratigraphy of early Pleistocene basalt flows and pillow lavas in the Fort Selkirk area indicates that volcanic damming of the Yukon River has occurred at least once previously.

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Mortensen, J. K., i G. A. Jilson. "Evolution of the Yukon-Tanana terrane: Evidence from southeastern Yukon Territory". Geology 13, nr 11 (1985): 806. http://dx.doi.org/10.1130/0091-7613(1985)13<806:eotyte>2.0.co;2.

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Chikita, Kazuhisa A., Tomoyuki Wada, Isao Kudo, Sei-Ichi Saitoh i Mitsuhiro Toratani. "Effects of River Discharge and Sediment Load on Sediment Plume Behaviors in a Coastal Region: The Yukon River, Alaska and the Bering Sea". Hydrology 8, nr 1 (12.03.2021): 45. http://dx.doi.org/10.3390/hydrology8010045.

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In the Bering Sea around and off the Yukon River delta, surface sediment plumes are markedly formed by glacier-melt and rainfall sediment runoffs of the Yukon River, Alaska, in June– September. The discharge and sediment load time series of the Yukon River were obtained at the lowest gauging station of US Geological Survey in June 2006–September 2010. Meanwhile, by coastal observations on boat, it was found out that the river plume plunges at a boundary between turbid plume water and clean marine water at the Yukon River sediment load of more than ca. 2500 kg/s. Grain size analysis with changing salinity (‰) for the river sediment indicated that the suspended sediment becomes coarse at 2 to 5‰ by flocculation. Hence, the plume’s plunging probably occurred by the flocculation of the Yukon suspended sediment in the brackish zone upstream of the plunging boundary, where the differential settling from the flocculation is considered to have induced the turbid water intrusion into the bottom layer.

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Flather, Patti. "Apprehending the Canadian Landscape: A Profile of Playwright Leslie Hamson". Canadian Theatre Review 73 (grudzień 1992): 33–35. http://dx.doi.org/10.3138/ctr.73.011.

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Playwright Leslie Hamson is sitting down to discuss her work in her cozy, cluttered Whitehorse home when her telephone rings. She takes the call – it’s someone helping her with spellings of Tlingit Indian words for the final draft of Last Rites. Set mainly in a trapper’s cabin in the Yukon bush, it’s the story of a dying woman coming to terms with the unfinished business in her life. The story had audiences in tears during its five-night run in Whitehorse in June. Produced by Nakai Theatre Ensemble and directed by Montrealer Svetlana Zylin, it was the first Yukon play featured at the new 420-seat Yukon Arts Centre in the Yukon capital.

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Plint, Heather E., i Terence M. Gordon. "The Slide Mountain Terrane and the structural evolution of the Finlayson Lake Fault Zone, southeastern Yukon". Canadian Journal of Earth Sciences 34, nr 2 (1.02.1997): 105–26. http://dx.doi.org/10.1139/e17-009.

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The Finlayson Lake Fault Zone forms a fundamental, but little studied, tectonic boundary between strata of autochthonous North America and the accreted Slide Mountain and Yukon–Tanana terranes in southeastern Yukon. A structural and petrologic study was undertaken to examine the depositional environment of the Slide Mountain Terrane, its tectono-thermal evolution in the fault zone, and its relationship with the Yukon–Tanana Terrane. The Slide Mountain and Yukon–Tanana terranes are divisible into units dominated by metavolcanic and metasedimentary rocks. Field observations and whole-rock geochemistry indicate that Slide Mountain greenstone is ocean-floor basalt deposited in a deep submarine basin with a proximal terrigenous sediment influx. Either a marginal- or ocean-basin setting is supported by the data. Slide Mountain greenstone is thrust northeastward over metasedimentary rocks of Slide Mountain Terrane and southwestward over rocks of the Yukon–Tanana Terrane. Regional metamorphic grade ranges from subgreenschist to greenschist facies. Pressure–temperature estimates for the subgreenschist–greenschist facies transition are 270–310 °C and 2.1–3.6 kbar (1 kbar = 100 MPa), based on assumed geothermal gradients and the reaction isograd Pmp + Chl = Act + Ep + H2O. Metamorphic peak postdates motion along the westernmost reverse fault that juxtaposes the Slide Mountain and Yukon–Tanana terranes. We interpret the Finlayson Lake Fault Zone as a northeasterly directed thrust sequence disrupted by synmetamorphic back thrusts. The back thrusting may be the consequence of shortening in the upper crust, or larger scale processes such as "tectonic wedging" of Yukon–Tanana Terrane under Slide Mountain Terrane.

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Cronin, Matthew A., William J. Spearman, Richard L. Wilmot, John C. Patton i John W. Bickham. "Mitochondrial DNA Variation in Chinook (Oncorhynchus tshawytscha) and Chum Salmon (O. keta) Detected by Restriction Enzyme Analysis of Polymerase Chain Reaction (PCR) Products". Canadian Journal of Fisheries and Aquatic Sciences 50, nr 4 (1.04.1993): 708–15. http://dx.doi.org/10.1139/f93-081.

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We analyzed intraspecific mitochondrial DNA variation in chinook salmon (Oncorhynchus tshawytscha) from drainages in the Yukon River (Alaska and Yukon Territory), the Kenai River (Alaska), and Oregon and California rivers; and chum salmon (O. keta) from the Yukon River and Vancouver Island, and Washington rivers. For each species, three different portions of the mtDNA molecule were amplified separately using the polymerase chain reaction and then digested with at least 19 restriction enzymes. Intraspecific sequence divergences between haplotypes were less than 0.01 base substitution per nucleotide. Nine chum salmon haplotypes were identified. Yukon River chum salmon stocks displayed more haplotypes (eight) than the stocks of Vancouver Island and Washington (two). The most common chum salmon haplotype occurred in all areas. Seven chinook salmon haplotypes were identified. Four haplotypes occurred in the Yukon and Kenai rivers and four occurred in Oregon/California, with only one haplotype shared between the regions. Sample sizes were too small to quantify the degree of stock separation among drainages, but the patterns of variation that we observed suggest utility of the technique in genetic stock identification.

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Cwynar, Les C., i Ray W. Spear. "Paleovegetation and Paleoclimatic Changes in the Yukon at 6 ka BP". Géographie physique et Quaternaire 49, nr 1 (30.11.2007): 29–35. http://dx.doi.org/10.7202/033027ar.

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ABSTRACTThe most recent paleoenvironmental change to affect the Yukon centres around 6.0 ka. In the forested southern Yukon, black spruce (Picea mariana) and green alder (Alnus crispa) expanded their populations at most sites between 6.5 and 6.0 ka. Even in the semi-arid region of SW Yukon these species increased their populations, although slightly later at 5.5 ka. These vegetation changes in the south imply cooler and wetter growing seasons, i.e. more mesic conditions. In the region of the upper Blackstone River of central Yukon, the modern vegetation consists of shrub tundra with scattered groves of white spruce (Picea glauca) and even fewer black spruce. Open forests of predominantly white spruce occupied the region as early as 9.5 ka, but between 6.5 and 6.0 ka white spruce declined as black spruce became the dominant tree, coincidentally with an increase in green alder. By 5.0 ka the vegetation had acquired its modern composition. As in the south, these changes imply cooling. Less evidence is available on the expansion of alder and black spruce in the northern Yukon. Both species increased in forested areas (forest-tundra) at 6.0 ka. These changes again imply cooling. Because both black spruce and green alder were present in Yukon well before 6 ka, these vegetation changes cannot be ascribed to migration lags.

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Finnamore, Albert T. "A NEW SPECIES OF CRABRO FROM ARCTIC YUKON (HYMENOPTERA: SPHECOIDEA: CRABRONIDAE)". Canadian Entomologist 120, nr 10 (październik 1988): 859–65. http://dx.doi.org/10.4039/ent120859-10.

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AbstractA new species of crabronine wasp, Crabro canningsi, is described from the Yukon. Its relationships with other species are discussed and additional records of Crabro species in the Yukon are presented.

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Newhouse, David. "Introduction". Journal of Aboriginal Economic Development 14, nr 1 (28.05.2024): 35. http://dx.doi.org/10.29173/jaed488.

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In this issue, we present two articles in Lessons from Research. The first article Where exactly are all the First Nation Businesses? Interpreting the First Nation Business Environment in Yukon, 2008-2021 by Ken Coates and Greg Finnegan examines situation of First Nations Businesses in Yukon Territory. As one of the fastest growing economies in Canada and with one of the longest standing land claims agreement the Yukon First Nation Final Agreements, the expectation was that Indigenous business formation would be high. However, Indigenous businesses continue to be underrepresented in the Yukon economy. While there are data challenges in collecting data on Indigenous businesses, a complex picture of factors affecting Indigenous businesses emerges. Future business development will require co-ordinated efforts by First Nations, Territorial, and Canadian governments to address well.

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Taliaferro, C. M., D. L. Martin, J. A. Anderson, M. P. Anderson, G. E. Bell i A. C. Guenzi. "Registration of ‘Yukon’ Bermudagrass". Crop Science 43, nr 3 (maj 2003): 1131–32. http://dx.doi.org/10.2135/cropsci2003.1131.

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Bradford, Charlene T., i Sharon D. L. Kroeker. "Educational Psychology in Yukon". Canadian Journal of School Psychology 31, nr 3 (24.07.2016): 271–74. http://dx.doi.org/10.1177/0829573516655230.

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Zack, Richard S. "Insects of the Yukon". Annals of the Entomological Society of America 91, nr 6 (1.11.1998): 893–94. http://dx.doi.org/10.1093/aesa/91.6.893.

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Johnson, P. G. "ROCK GLACIERS, SOUTHWEST YUKON". Canadian Geographer/Le Géographe canadien 32, nr 3 (wrzesień 1988): 277–80. http://dx.doi.org/10.1111/j.1541-0064.1988.tb00880.x.

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Lauriol, Bernard. "CRYOPLANATION TERRACES, NORTHERN YUKON". Canadian Geographer/Le Géographe canadien 34, nr 4 (grudzień 1990): 347–51. http://dx.doi.org/10.1111/j.1541-0064.1990.tb01276.x.

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Dacks, Gurston. "Implementing First Nations Self-Government in Yukon: Lessons for Canada". Canadian Journal of Political Science 37, nr 3 (wrzesień 2004): 671–94. http://dx.doi.org/10.1017/s0008423904030367.

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Abstract: The experience of implementing self-government in the Yukon offers important insights into the future of self-government nationally. Yukon First Nations have created institutions that reflect their traditional values, that achieve creditable levels of accountability and that have limited their responsibilities to what their staff resources can handle. Yukon First Nations have assumed relatively few jurisdictional responsibilities because they reject the financial terms presented by the federal and territorial governments. This pattern is likely to weaken inherence-based governments as they appear elsewhere in Canada. This prospect raises the question of how First Nations should divide their energy and resources between pursuing inherence and strengthening the capacity of their existing institutions.Résumé.La mise en oeuvre d'un gouvernement autonome au Yukon offre d'importants aperçus sur l'avenir de l'autonomie sur le plan national. Les autochtones du Yukon ont créé des institutions qui reflètent leurs valeurs traditionnelles, atteignent des niveaux estimables de responsabilité et ont limité leurs engagements en fonction de leurs ressources en personnel. Les autochtones du Yukon ont assumé relativement peu de responsabilités juridictionnelles parce qu'ils rejettent les conditions financières présentées par le gouvernement fédéral et le gouvernement territorial. Ce dilemme va vraisemblablement affaiblir les gouvernements inhérents qui verront le jour ailleurs au Canada. La question se pose dès lors de savoir comment les autochtones devraient diviser leur énergie et leurs ressources entre la poursuite de l'inhérence et le renforcement de la capacité de leurs institutions existantes.

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Klimaszewski, Jan, Benoit Godin, Georges Pelletier i Karine Savard. "Six new species and records of aleocharine beetles from the Yukon and Alaska (Coleoptera: Staphylinidae: Aleocharinae)". Canadian Entomologist 140, nr 3 (czerwiec 2008): 265–91. http://dx.doi.org/10.4039/n07-054.

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AbstractSix new aleocharine species are described and illustrated from the Yukon and Alaska: Atheta (Dimetrota) cadeti Klimaszewski and Godin, sp. nov.; Atheta (Hypatheta) pseudomet lakatlana Klimaszewski and Godin, sp. nov.; Cypha inexpectata Klimaszewski and Godin, sp. nov.; Oxypoda yukonensis Klimaszewski and Godin, sp. nov., Oxypoda pseudoconvergens Klimaszewski and Godin, sp. nov.; and Clusiota antennalis Klimaszewski and Godin, sp. nov.Atheta (Rhagocneme) subsinuata (Erichson), known from the western Palaearctic region, was discovered in the Yukon and is reported in North America for the first time as an adventive species. Amischa tersa Casey is recorded from Canada and the Yukon for the first time. Twenty-four new records of aleocharine species from the Yukon are provided in addition to species described as new to science. One hundred and fifteen digital images of external and genital structures are provided for species identification.

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Cody, William J., Catherine E. Kennedy, Bruce Bennett i Jennifer Staniforth. "New Records of Vascular Plants in the Yukon Territory V". Canadian Field-Naturalist 117, nr 2 (1.04.2003): 278. http://dx.doi.org/10.22621/cfn.v117i2.707.

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Based on field reconnaissance in 2000 and 2001 throughout Yukon but particularly in the areas of the Upper Bonnet Plume River, Wind River, Eagle Plains and Vuntut National Park, information is provided on geographically significant plant occurrences. Three native taxa, Draba kananaskis, Hieracium albiflorum and Prunella vulgaris ssp. lanceolata and five introduced taxa, Alopecurus geniculatus, Dactylis glomerata, Elymus junceus, Lotus corniculatus, and Verbena hastata are reported new to the known flora of the Yukon Territory. Signifigant range extensions for 190 native and 24 introduced taxa are included. Maianthemum dilatatum is excluded from the Yukon flora.

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Jung, Thomas S., Troy D. Pretzlaw i David W. Nagorsen. "Northern Range Extension of the Pygmy Shrew, Sorex hoyi, in the Yukon". Canadian Field-Naturalist 121, nr 1 (1.01.2007): 94. http://dx.doi.org/10.22621/cfn.v121i1.402.

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A Pygmy Shrew, Sorex hoyi, was captured in a pitfall trap on the Blackstone River (65°04.6'N, 138°10.8'W) in central Yukon. This represents a northern range extension of about 110 km for S. hoyi in the Yukon.

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Golding, M. L., J. K. Mortensen, F. Ferri, J. P. Zonneveld i M. J. Orchard. "Determining the provenance of Triassic sedimentary rocks in northeastern British Columbia and western Alberta using detrital zircon geochronology, with implications for regional tectonics". Canadian Journal of Earth Sciences 53, nr 2 (luty 2016): 140–55. http://dx.doi.org/10.1139/cjes-2015-0082.

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Triassic rocks of the Western Canada Sedimentary Basin (WCSB) have previously been interpreted as being deposited on the passive margin of North America. Recent detrital zircon provenance studies on equivalent Triassic rocks in the Yukon have suggested that these rocks were in part derived from the pericratonic Yukon–Tanana terrane and were deposited in a foreland basin related to the Late Permian Klondike orogeny. Detrital zircons within a number of samples collected from Triassic sediments of the WCSB throughout northeastern British Columbia and western Alberta suggest that the bulk of the sediment was derived from recycled sediments of the miogeocline along western North America, with a smaller but significant proportion coming from the Innuitian orogenic wedge in the Arctic and from local plutonic and volcanic rocks. There is also evidence of sediment being derived from the Yukon–Tanana terrane, supporting the model of terrane accretion occurring prior to the Triassic. The age distribution of detrital zircons from the WCSB in British Columbia is similar to those of the Selwyn and Earn sub-basins in the Yukon and is in agreement with previous observations that sediment deposited along the margin of North America during the Triassic was derived from similar source areas. Together these findings support the model of deposition within a foreland basin, similar to the one inferred in the Yukon. Only a small proportion of zircon derived from the Yukon–Tanana terrane is present within Triassic strata in northeastern British Columbia, which may be due to post-Triassic erosion of the rocks containing these zircons.

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40

Giberson, Donna J., i Steven K. Burian. "How valid are old species lists? How archived samples can be used to update Ephemeroptera biodiversity information for northern Canada". Canadian Entomologist 149, nr 6 (20.07.2017): 755–73. http://dx.doi.org/10.4039/tce.2017.27.

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AbstractBroad-scale aquatic insect ecological studies are an important potential source of biodiversity information, though taxa lists may contain outdated names or be incompletely or incorrectly identified. We re-examined over 12 000 archived Ephemeroptera (mayfly) specimens from a large environmental assessment project (Mackenzie Valley pipeline study) in Yukon and the Northwest Territories, Canada (1971–1973) and compared the results to data from five recent (post-2000) collecting expeditions. Our goals were to update the species list for Ephemeroptera for Yukon and the Northwest Territories, and to evaluate the benefits of retaining and re-examining ecological samples to improve regional biodiversity information, particularly in isolated or inaccessible areas. The original pipeline study specimen labels reported 17 species in 25 genera for the combined Yukon and Northwest Territories samples, of which six species and 15 genera are still valid. Re-examination of specimens resulted in 45 species in 29 genera, with 14 and seven newly recorded species for Northwest Territories and Yukon, respectively. The recent collecting resulted in 50 species, 29 of which were different from the pipeline study, and five of which were new territorial records (Northwest Territories: four species; Yukon: one species). Re-examination of archived ecological specimens provides a cost-effective way to update regional biodiversity information.

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Sedinger, James S., Mark P. Herzog, Brian T. Person, Morgan T. Kirk, Tim Obritchkewitch, Philip P. Martin, Alice A. Stickney i C. Bosque. "Large-Scale Variation in Growth of Black Brant Goslings Related to Food Availability". Auk 118, nr 4 (1.10.2001): 1088–95. http://dx.doi.org/10.1093/auk/118.4.1088.

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AbstractWe examined variation in growth of Black Brant (Branta bernicla nigricans) goslings among two colonies on the Yukon-Kuskokwim Delta in southwestern Alaska and the Colville River Delta on Alaska's Arctic coast. We simultaneously measured abundance and quality of a key food plant, Carex subspathacea, and grazing pressure on that plant at the three colonies. Our goal was to measure variation in gosling growth in relation to variation in grazing pressure and food abundance because growth of goslings is directly linked to first-year survival, and consequently is the principal mechanism for density-dependent population regulation. Goslings grew substantially faster on the arctic coast and were nearly 30% larger than those on the Yukon-Kuskokwim Delta at four to five weeks old. Faster growth on the arctic coast was associated with 2× greater standing crop of C. subspathacea during brood rearing than on the Yukon-Kuskokwim Delta. Dispersal rates are high enough (Lindberg et al. 1998) to rule out local adaptation and genetic variation as explanations for observed variation in growth. Our results are consistent with lower survival of goslings from the Yukon-Kuskokwim Delta during their first fall migration and stronger density-dependent regulation on the Yukon-Kuskokwim Delta than on the Arctic coast.

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Bender, Adrian M., Richard O. Lease, Lee B. Corbett, Paul R. Bierman, Marc W. Caffee, James V. Jones i Doug Kreiner. "Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma". Earth Surface Dynamics 10, nr 5 (28.10.2022): 1041–53. http://dx.doi.org/10.5194/esurf-10-1041-2022.

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Abstract. River erosion affects the carbon cycle and thus climate by exporting terrigenous carbon to seafloor sediment and by nourishing CO2-consuming marine life. The Yukon River–Bering Sea system preserves rare source-to-sink records of these processes across profound changes in global climate during the past 5 million years (Ma). Here, we expand the terrestrial erosion record by dating terraces along the Charley River, Alaska, and explore linkages among previously published Yukon River tributary incision chronologies and Bering Sea sedimentation. Cosmogenic 26Al/10Be isochron burial ages of Charley River terraces match previously documented central Yukon River tributary incision from 2.6 to 1.6 Ma during Pliocene–Pleistocene glacial expansion, and at 1.1 Ma during the 1.2–0.7 Ma Middle Pleistocene climate transition. Bering Sea sediments preserve 2–4-fold rate increases of Yukon River-derived continental detritus, terrestrial and marine organic carbon, and silicate microfossil deposition at 2.6–2.1 and 1.1–0.8 Ma. These tightly coupled records demonstrate elevated terrigenous nutrient and carbon export and concomitant Bering Sea productivity in response to climate-forced Yukon River incision. Carbon burial related to accelerated terrestrial erosion may contribute to CO2 drawdown across the Pliocene–Pleistocene and Middle Pleistocene climate transitions observed in many proxy records worldwide.

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Lamoureux, Ryan P., Melanie R. Boudreau i Jacob L. Seguin. "New Breeding Record for Merlin (Falco columbarius) in Southwestern Yukon". Canadian Field-Naturalist 131, nr 4 (23.05.2018): 344–46. http://dx.doi.org/10.22621/cfn.v131i4.1910.

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On 3 May 2016, we observed two Merlins (Falco columbarius) copulating near Hungry Lake in southwestern Yukon. We recorded Merlins frequently from May until the beginning of July and observed them defending the area from Common Ravens (Corvus corax) on two occasions, an activity indicative of a nesting pair. This is the first breeding record for Merlins in southern Yukon, as previous records have documented the breeding range only in central and northern parts of the territory. Here, we summarize historical sightings and breeding reports throughout southern Yukon since 1975 and fill a gap in the breeding range of this species.

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Mackenzie-Grieve, Jody L., i John R. Post. "Projected impacts of climate warming on production of lake trout (Salvelinus namaycush) in southern Yukon lakes". Canadian Journal of Fisheries and Aquatic Sciences 63, nr 4 (1.04.2006): 788–97. http://dx.doi.org/10.1139/f05-257.

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We used existing models to predict changes in lake surface temperature and thermocline depth, in combination with a newly developed model to describe lake thermal profiles, to determine how thermal properties of a series of lakes located predominantly in the southern Yukon could change under three realistic climate-warming scenarios. We then used existing models to determine how relative changes in potential harvest of lake trout (Salvelinus namaycush) in southern Yukon lakes could change as availability of optimal thermal habitat was altered under the three warming scenarios. With warming, an overall decrease in availability of optimal thermal habitat and in lake trout potential harvest is predicted in southern Yukon lakes, although considerable lake-specific variation in direction and magnitude of change exists. For southern Yukon lakes overall, 2, 4, and 6 °C increases in mean annual air temperature lead to 12%, 35%, and 40% decreases in thermal habitat volume, respectively, and 8%, 19%, and 23% reductions in potential harvest, respectively.

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Wilmot, Richard L., Rebecca J. Everett, William J. Spearman, Ramone Baccus, Natalya V. Varnavskaya i S. V. Putivkin. "Genetic Stock Structure of Western Alaska Chum Salmon and a Comparison with Russian Far East Stocks". Canadian Journal of Fisheries and Aquatic Sciences 51, S1 (19.12.1994): 84–94. http://dx.doi.org/10.1139/f94-297.

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Substantial genetic divergence was found among chum salmon (Oncorhynchus keta) populations collected from North America and Russia. Five major groups of populations can be identified by geographic region: (1) lower Yukon River summer run; (2) upper Yukon River fall run; (3) Bristol Bay area; (4) Alaska Peninsula; and (5) Russia. Mean heterozygosities were 0.064, 0.062, 0.065, 0.064, and 0.063, respectively; and the percent polymorphic loci values at the 0.99 level were 33.7, 31.3, 32.6, 30.6, and 30.9%, respectively. The hierarchical gene diversity analysis showed that 95.42% of the diversity can be explained by heterogeneity within sites, 1.36% among sites, 0.49% between Yukon River run timing, 1.69% among areas, and 1.04% among countries. The Alaska Peninsula populations are genetically more similar to populations from Russia than to those from western Alaska, and two populations from the upper Yukon River are distinct from other nearby populations. Possible reasons for these findings concern the complex glacial histories of the watersheds.

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Coates, Ken. "Where Exactly are all the First Nation Businesses?" Journal of Aboriginal Economic Development 14, nr 1 (28.05.2024): 36–73. http://dx.doi.org/10.29173/jaed12.

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The Yukon has one of the fastest growing, albeit smallest, economies in Canada, with an increasing population and a tight labour market. Modern treaties and self-government agreements have empowered First Nations government and Supreme Court decisions and treaty rights secured Indigenous governments a significant place in the resource sector. Yet Yukon First Nation businesspeople are not yet benefiting fully from this positive political and economic situation. This paper explores the underrepresentation of the Yukon First Nation businesspeople in the economy through an exploration of the available data from the Yukon business survey, census of Canada self-employment data and a new national program at Statistics Canada that is working to better define the presence of Indigenous businesses within the national economy. The research shows that work still needs to be done to better support the development of Indigenous businesspeople as they strive to break through the barriers that have left on the margins of the northern economy.

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Coates, Ken, i Greg Finbegan. "Where Exactly are all the First Nation Businesses?" Journal of Aboriginal Economic Development 14, nr 1 (30.05.2024): 36–73. http://dx.doi.org/10.29173/jaed11.

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The Yukon has one of the fastest growing, albeit smallest, economies in Canada, with an increasing population and a tight labour market. Modern treaties and self-government agreements have empowered First Nations government and Supreme Court decisions and treaty rights secured Indigenous governments a significant place in the resource sector. Yet Yukon First Nation businesspeople are not yet benefiting fully from this positive political and economic situation. This paper explores the underrepresentation of the Yukon First Nation businesspeople in the economy through an exploration of the available data from the Yukon business survey, census of Canada self-employment data and a new national program at Statistics Canada that is working to better define the presence of Indigenous businesses within the national economy. The research shows that work still needs to be done to better support the development of Indigenous businesspeople as they strive to break through the barriers that have left on the margins of the northern economy.

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Mortensen, J. K. "Pre-Mid-Mesozoic tectonic evolution of the Yukon-Tanana Terrane, Yukon and Alaska". Tectonics 11, nr 4 (sierpień 1992): 836–53. http://dx.doi.org/10.1029/91tc01169.

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Piercey, Stephen J., Donald C. Murphy, James K. Mortensen i Suzanne Paradis. "Boninitic magmatism in a continental margin setting, Yukon- Tanana terrane, southeastern Yukon, Canada". Geology 29, nr 8 (2001): 731. http://dx.doi.org/10.1130/0091-7613(2001)029<0731:bmiacm>2.0.co;2.

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Wilson, Frederic H., James G. Smith i Nora Shew. "Review of radiometric data from the Yukon Crystalline Terrane, Alaska and Yukon Territory". Canadian Journal of Earth Sciences 22, nr 4 (1.04.1985): 525–37. http://dx.doi.org/10.1139/e85-054.

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The results of more than 20 years of geochronological studies in the Yukon Crystalline Terrane in east-central Alaska and the western Yukon Territory suggest at least six igneous and thermal (metamorphic?) events. Plutonism during Mississippian, Early Jurassic, mid-Cretaceous, Late Cretaceous, and early Tertiary times is indicated. Evidence also indicates that Mississippian, Early Jurassic, late Early Cretaceous, and late Cretaceous thermal (metamorphic?) events have affected parts of the terrane. The western part of the terrane was affected by a significant regional metamorphic event in late Early Cretaceous time, followed by a terrane-wide mid-Cretaceous plutonic event. The pattern of K–Ar ages allows division of the terrane into domains, bounded by northeast-trending lineaments.

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