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For seven to eight months of the year the Yukon River is ice-covered in the interior of Yukon and Alaska. Between Dawson City, Yukon and Circle, Alaska, the Yukon River is narrowly-confined between steep bedrock valley walls with limited floodplain and the formation of ice jams and their related flooding is the most unpredictable hazard. In over a century of recorded river-ice break-up at Dawson City, the only floods to exceed bankfull have been ice-caused thus overbank sedimentation is the result of low-frequency - high-magnitude ice jam floods. In this thesis, I have developed a methodology to reconstruct paleo-ice jam flood histories on northern rivers for periods beyond the historic record (∼100 years) and in...
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Protected areas are instrumental in preserving the ecological and geographical diversity that define our nation. Park managers face a challenge in protecting natural ecosystems while at the same time providing recreational opportunities. To mitigate negative impacts from visitor use managers are beginning to rely more heavily on direct strategies that restrict or limit human use. Coupled with the pressure to limit human use, there is a greater requirement for park managers to base management decisions on science and public input. This study aimed to determine the direct management techniques that are being implemented in backcountry areas of Western Canadian protected areas. The goals of my research were to determine...
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In theory, co-management is defined as a partnership arrangement in which government, the community of local resource users, and other resource stakeholders, share the responsibility and authority for the management of a resource. In practice, however, co-management has been used to describe a number of resource management regimes, ranging from processes that utilize only community consultation, to partnerships that incorporate equal participant decision-making. Under Northern Canadian Land Claim Settlements, co-management commonly involves joint decision making and shared responsibility regarding resource planning and management. Although these resource management boards have the financial and legal backing of...
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Large lightning-caused fires in the forested areas of Canada and Alaska account for most of the area burnt and are one of the main determiners of the age mosaic of the landscape. Generally such fires occur when positive mid-troposphere pressure anomalies persist for more than ten days during the fire season. Mid-troposphere anomalies are part of teleconnection patterns which are created by internal atmospheric and coupled sea/air dynamics. Large lightning fire occurrence and area burnt data were used to define eight major centres of large fire variability (Fire Regions) in the forested areas of Canada and Alaska between 1959 and 1999. Preferred positions of persistent positive mid-troposphere anomalies correlated...
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Wood bison (Bison bison athabascae ) were reintroduced into southwestern Yukon as part of a national recovery program in the late 1980s. The Yukon Bison Management Plan identified potential impacts of the reintroduced bison on other ecosystem components as a priority management issue. In particular, local residents expressed concern for the indirect effects of bison on the Aishihik woodland caribou ( Rangifer tarandus caribou ) herd resulting from competition for space and forage during late winter. This project assessed the potential for exploitative competition between bison and caribou by determining resource selection (i.e., use vs. availability) and overlap in resource use across 3 spatial scales: the landscape,...
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Baseline 5-Baseline Data,
P2-Changes in Plant and Animal Species Due to Climate Change,
Projecting Future States 2,
Species of Concern: Caribou,
Woodland Herd
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