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This ArcGIS shapefile shows the known locations of beaver dams in the Tualatin Basin. The dam location information was generated by multiple local agencies, groups, and organizations. The local sources had identified the beaver dams between 2011 and 2019. USGS worked with these local sources to combine all data into one inventory.
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Shallow Bay is a 230 hectare wetland at the south end of Lake Laberge in the southern Yukon. It has been central to the original use of the area by the Ta’an Kwachan first nation. It is an important waterfowl staging area; a key fish spawning and rearing area, and is used by moose, beaver, bear, mustelids, muskrats and a host of bird species. We found 36 species of water birds using the area; banded waterfowl showed birds from all North American flyways except the Atlantic were using the area. Most use by water birds was for staging although at least 4 species were breeding. Over 100 species of songbirds were observed and at least 17 species were breeding. Wood frogs, and 9 species of fish were identified. 6 species...
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This ArcGIS shapefile shows the known locations of beaver activity (including beaver chews, lodges, and dams) in the Tualatin Basin. USGS was intending to collect information about the locations of beaver dams. Often, the GPS coordinates of dams were not known, but the beaver-affected areas were known. The information about locations with beaver activity was generated by multiple local agencies, groups, and organizations. The local sources had identified the beaver activity locations between 2013 and 2016. USGS worked with these local sources to combine all data into one inventory.
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The Alaska Highway crosses numerous terrain units underlined by warm and ice-rich discontinuous permafrost highly susceptible to thermal degradation. For years, this infrastructure, which is essential to transportation in northwestern Canada and Alaska, has been showing signs of road damage induced by permafrost degradation. In 2008, Yukon Highways and Public Works, and its international collaborators, implemented a road experimental site near Beaver Creek (Yukon) to test mitigation techniques aiming to control permafrost degradation. Permafrost investigations were done accordingly to a geosystem approach based on the hypothesis that permafrost has a distinctive sensitivity to climate and terrain conditions at a...
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This report presents the results of a harvest survey and ethnographic research project that investigated the subsistence uses of large land mammals and furbearers in Game Management Unit 25 in the Yukon Flats region of Interior Alaska. Large land mammal species harvested and used by Yukon Flats residents include moose Alces alces, caribou Rangifer tarandus, black bear Ursus americanus, and brown bear Ursus arctos. Furbearing species included in this study are marten Martes americana, lynx Lynx canadensis, and wolf Canis lupus. For the 2008–2009 study year a total of 284 of 467 households (approximately 61%) were surveyed in the 7 Yukon Flats communities of Beaver, Birch Creek, Chalkyitsik, Circle, Fort Yukon, Stevens...
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PURPOSE: The implementation of a revised comprehensive conservation plan for the Kenai National Wildlife Refuge of Alaska is proposed. The plan, which would perpetuate or replace the currently in force 1985 management plan, would guide management of the refuge for the next 15 years. The 1.32-mllion-acre refuge, which lies on the Kenai Peninsula along the Turnagain Arm and Cook Inlet, has been described as "Alaska in miniature" with reference to its cross-section of Alaskan habitats. Key issues identified during scoping include those related to large-scale habitat changes and the use of fire, management of existing facilities for public use while ensuring natural resource protection, enhancement of wildlife-dependent...
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In recent years the management of the Copper River has provided an abundance of salmon but there are indications that certain wild stocks of sockeye and Chinook salmon may have declined from historical levels. In particular local people have indicated that climate change, beaver dams, and human use have altered salmon runs on certain tributary streams of the Copper River. Collecting traditional knowledge about past and present runs and correlating that data from the natural and social sciences (e.g. biology, geography, geology, anthropology, and archaeology) would extend our temporal knowledge of the Copper River salmon fishery and supplement and validate indices of abundance for Chinook and sockeye salmon. Eric...
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Dramatic climate changes and expansion of new biomes characterize the late Pleistocene - early Holocene of eastern Beringia. Analysis of plant macrofossils and pollen from three different sites in the Yukon Flats, central Alaska, record the past vegetation during the late Pleistocene - early Holocene (ca. 11,500-6,900 14 C yrs BP) transition. The first paper deals with plant macrofossils associated with one of the earliest post glacial beaver dams (ca. 9,300 14 C yrs BP) found in central Alaska. Vegetation reconstruction suggests a warmer than modern climate during the early Holocene. The second paper examines eight paleosols and their associated plant macrofossils and pollen within eolian deposits at two sites...
    map background search result map search result map Subsistence Land Mammal Harvests and Uses, Yukon Flats, Alaska: 2008-2010 Harvest Report and Ethnographic Update Western toad, Bufo boreas, stewardship in the Yukon: Yukon biodiversity report Adult Salmon Runs and Streamflow Data at a Resistance Board Weir on Beaver Creek, Alaska, 1998-2000 Late Pleistocene - early Holocene plant macrofossils and pollen from the Yukon Flats, central Alaska REVISED COMPREHENSIVE CONSERVATION PLAN, KENAI NATIONAL WILDLIFE REFUGE, ALASKA. [Part 3 of 5] A geosystems approach to permafrost investigations for engineering applications, an example from a road stabilization experiment, Beaver Creek, Yukon, Canada THE SHALLOW BAY WETLAND AN ANALYSIS OF ITS NATURAL HISTORY AND A PLAN FOR PROTECTION Management of beaver for the benefit of fish in the upper Yukon River Basin Traditional Knowledge of Long Term Changes in Salmon Runs in the Copper River: Annual Report Influence of landslides on biophysical diversity; a perspective from British Columbia Beaver dam locations in the Tualatin Basin, Oregon, between 2011 and 2019 Beaver activity locations in the Tualatin Basin, Oregon, between 2013 and 2016 THE SHALLOW BAY WETLAND AN ANALYSIS OF ITS NATURAL HISTORY AND A PLAN FOR PROTECTION Adult Salmon Runs and Streamflow Data at a Resistance Board Weir on Beaver Creek, Alaska, 1998-2000 Beaver activity locations in the Tualatin Basin, Oregon, between 2013 and 2016 A geosystems approach to permafrost investigations for engineering applications, an example from a road stabilization experiment, Beaver Creek, Yukon, Canada Beaver dam locations in the Tualatin Basin, Oregon, between 2011 and 2019 REVISED COMPREHENSIVE CONSERVATION PLAN, KENAI NATIONAL WILDLIFE REFUGE, ALASKA. [Part 3 of 5] Late Pleistocene - early Holocene plant macrofossils and pollen from the Yukon Flats, central Alaska Subsistence Land Mammal Harvests and Uses, Yukon Flats, Alaska: 2008-2010 Harvest Report and Ethnographic Update Traditional Knowledge of Long Term Changes in Salmon Runs in the Copper River: Annual Report Management of beaver for the benefit of fish in the upper Yukon River Basin Western toad, Bufo boreas, stewardship in the Yukon: Yukon biodiversity report Influence of landslides on biophysical diversity; a perspective from British Columbia