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Using a bioclimatic envelope approach, University of Alberta investigators project how the distribution and abundance of boreal forest birds across North America will respond to different scenarios of future climate-change. Investigation emphasis is on mapping and quantifying potential range expansions of boreal bird species into Arctic and subarctic regions across Alaska and Canada. The final products demonstrate a broad continental-scale overview of potential shifts in avian distribution.
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Climate models project the rapid warming of boreal and arctic regions of NorthAmerica. This has led to predictions that boreal forest vegetation and fauna will track these changes andshift northward into the arctic over the next century. We used a comprehensive dataset of avian pointcountsurveys from across boreal Canada and Alaska, combined with the best-available interpolatedclimate data, to develop bioclimatic niche models of current avian distribution and density for 102 nativespecies of forest songbirds. We then used a downscaling of projected climates in future periods (2011–2040, 2041–2070, 2071–2100) to assess the potential for these species to shift their ranges and increasetheir abundance across North...
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Schaft Creek is a calc-alkaline porphyry Cu-Mo-Au deposit located in northwestern British Columbia. Hosted by Late Triassic basaltic to andesitic volcanic rocks of the Stuhini Group, the deposit formed as a result of crystallization of the underlying Hickman/Yehiniko batholith complex which released granodioritic porphyritic dykes and fluids into the overlying volcanic sequence. The age of the Hickman/Yehiniko batholith complex is approximately constrained by a composite U-Pb zircon date of 222.1 c 9.6 Ma, which is in broad agreement with a well-constrained age for mineralization of 222.0 c 0.8 Ma (Re-Os molybdenite). The deposit shares characteristics of both the classic and diorite porphyry models, with silica-poor...
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In this dissertation, tephrostratigraphy is used as the central method to address issues of chronology in the late Quaternary sedimentary record of eastern Beringia (non-glaciated Yukon and Alaska) at a variety of spatial and temporal scales. The Palisades, central Alaska, preserves paleoenvironmental records thought to span, with major unconformities, the Holocene to early Pleistocene (~2 Ma). Two paleomagnetic transects of normal polarity and tephrostratigraphic data show the Palisades are Middle to Late Pleistocene in age, with no major unconformities. Of 19 tephra beds identified, nine are Middle Pleistocene beds known from other sites. The Variegated (VT) tephra has a known distribution second only to the Old...
    map background search result map search result map Ecological Genetics of Northern Wolves and Arctic Foxes The Schaft Creek porphyry copper-gold-molybdenum-silver deposit, northwestern British Columbia People of the lakes: stories of our Van Tat Gwich’in Elders/Googwandak Nakhwach’anjoo Van Tat Gwich’in Tephrostratigraphy and paleoenvironments of the late Quaternary in eastern Beringia Dissolved Organic Carbon Mobilization and Degradation Patterns in Retrogressive Thaw Slumps of the Peel Plateau, Northwest Territories, Canada Analyzing and Characterizing Hydroclimatic Extremes over Canada Fuel Moisture Changes from Sprinkler-watering Treatments in Interior Alaska Boreal Forests Spatiotemporal Patterns and Population Characteristics of Harvested Wolverine (Gulo gulo) in Yukon RESOURCE ECONOMICS AND ENVIRONMENTAL SOCIOLOGY Records of atmospheric mercury deposition and post-depositional mobility in peat permafrost archives from central and northern Yukon, Canada Stressor response and spatial dynamics of mountain lake communities Yukon lce Patches: Role of lce-entombed Bryophytes in Alpine A Functional Approach Reveals Zooplankton Responses to Environmental Change in Mountain Lakes Modeling Avifaunal Responses Executive Summary Modeling avifaunal responses to climate change in North America's boreal-Arctic transition zone The Schaft Creek porphyry copper-gold-molybdenum-silver deposit, northwestern British Columbia Records of atmospheric mercury deposition and post-depositional mobility in peat permafrost archives from central and northern Yukon, Canada Yukon lce Patches: Role of lce-entombed Bryophytes in Alpine Dissolved Organic Carbon Mobilization and Degradation Patterns in Retrogressive Thaw Slumps of the Peel Plateau, Northwest Territories, Canada People of the lakes: stories of our Van Tat Gwich’in Elders/Googwandak Nakhwach’anjoo Van Tat Gwich’in Fuel Moisture Changes from Sprinkler-watering Treatments in Interior Alaska Boreal Forests Tephrostratigraphy and paleoenvironments of the late Quaternary in eastern Beringia Spatiotemporal Patterns and Population Characteristics of Harvested Wolverine (Gulo gulo) in Yukon A Functional Approach Reveals Zooplankton Responses to Environmental Change in Mountain Lakes Ecological Genetics of Northern Wolves and Arctic Foxes Stressor response and spatial dynamics of mountain lake communities Analyzing and Characterizing Hydroclimatic Extremes over Canada RESOURCE ECONOMICS AND ENVIRONMENTAL SOCIOLOGY Modeling Avifaunal Responses Executive Summary Modeling avifaunal responses to climate change in North America's boreal-Arctic transition zone