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Several studies have documented the potential and existing environmental degradation due to all-terrain vehicle (ATV) use in sub-arctic terrain. Impacts include vegetation damage or destruction, changes in vegetation community composition and structure, substrate thermal change and permafrost thaw, and soil erosion and subsequent development of thermokarst features and terrain degradation. One of the most evident effects of prolonged ATV use in sub-arctic tundra is the development of extensive trail braiding. Trail braiding results from alternate trails that are created by users in order to avoid mud bogs and standing water (ponding) that develop on ATV trails which are underlain by ice ridge permafrost. One option...
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The Neversweat Prospect (MMK-092) is located on the right bank of Eldorado Creek, a tributary of Moose Creek. The site is a landscape of the Kantishna Historic Mining District (KHMD). The KHMD is within the boundaries of Denali National Park and Preserve, at the end of the 92 mile Park Road near Wonder Lake. The Neversweat Prospect is a 4.3 acre historic site and contains a small collection of historic buildings and structures, small scale features and landscape features associated with lode mining. The extant features consist of one building (cabin), and 15 structures (three collapsed adits, one partially collapsed adit, one partially collapsed outhouse, a historic road, a historic trail, six rock retaining walls)....
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The ambermarked birch leafminer (AMBLM) (Profenusa thomsoni ) is an invasive leafminer native to the Palearctic from the United Kingdom to Turkey to Japan. It was introduced to the eastern United States in 1921 and has since spread to the mid-western U.S. states and Canadian provinces. This leafminer was introduced to Alaska in 1996, where it has since spread over 140,000 acres, from Haines to Fairbanks. The most severe damage is found throughout the Anchorage bowl, which extends south to Girdwood and North to Wasilla. The damage caused by P. thomsoni can be severe, defoliating entire trees. In 2006, it was noted that urban areas in Alaska experienced higher densities of AMBLM leafminer than adjacent forested areas....
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Invasive species are a concern worldwide as they can displace native species, reduce biodiversity, and disrupt ecological processes. European bird cherry (Prunus padus) (EBC) is an invasive ornamental tree that is rapidly spreading and possibly displacing native trees along streams in parts of urban Alaska. The objectives of this study were to: 1) map the current distribution of EBC along two Anchorage streams, Campbell and Chester creeks, and 2) determine the effects of EBC on selected ecological processes linked to stream salmon food webs. Data from the 2009 and 2010 field seasons showed: EBC was widely distributed along Campbell and Chester creeks; EBC leaf litter in streams broke down rapidly and supported similar...
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This report describes the work performed by the Alaska Exotic Plant Management Team at Yukon-Charley Rivers National Preserve and Gates of the Arctic National Park & Preserve during the 2011 season including objectives, methods, and major conclusions. This field work is a continuation of work done by the Alaska Exotic Plant Management Team in the summer of 2010. The 2011 season was divided into four main regions from highest to lowest priority: Coal Creek Camp; Slaven’s Roadhouse; the Dalton Highway south of Coldfoot, AK; and Gates of the Arctic National Park & Preserve along the Middle Fork of the Koyukuk River. The main area of focus during the 2011 season was the high traffic areas along Coal Creek; a tributary...
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Comparative biogeochemical studies performed on the same plant species in remote areas enable pinpointing interspecies and interregional differences of chemical composition. This report presents baseline concentrations of PAHs and trace elements in moss species Hylocomium splendens and Pleurozium schreberi from the Holy Cross Mountains (south-central Poland) (HCM) and Wrangell–Saint Elias National Park and Preserve (Alaska) and Denali National Park and Preserve (Alaska). Total PAH concentrations in the mosses of HCM were in the range of 473–2970 mg kg1 (dry weight basis; DW), whereas those in the same species of Alaska were 80–3390 mg kg1 DW. Nearly all the moss samples displayed the similar ring sequence: 3 > 4...
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A bald eagle survey protocol specific to LACL was developed and implemented in 1999. Intensive surveys to locate new nests and check the status of existing nests will be conducted in 3 survey areas on a yearly rotational basis. In 2001, the bald eagle early occupancy surveys (EOS) were conducted on nests known to be active or occupied during 2000 and 1999. The late productivity surveys (LPS) were conducted utilizing the active and occupied nests found during the 2001 EOS.
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North American caribou (Rangifer tarandus) herds commonly exhibit little nuclear genetic differentiation among adjacent herds, although available evidence supports strong demographic separation, even for herds with seasonal range overlap. During 1997–2003, we studied the Mentasta and Nelchina caribou herds in south-central Alaska using radiotelemetry to determine individual movements and range overlap during the breeding season, and nuclear and mitochondrial DNA (mtDNA) markers to assess levels of genetic differentiation. Although the herds were considered discrete because females calved in separate regions, individual movements and breeding-range overlap in some years provided opportunity for male-mediated gene...
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Snowmachine use in Alaska has increased substantially during the previous decade. In addition, innovations in the design and performance of these vehicles has allowed riders to travel farther and faster per hour of riding time than was possible in the past. These design innovations have resulted in the elimination of de facto natural barriers (i.e. steep terrain) to snowmachine access. A potential consequence of this trend in use and these technological changes is increased impacts on the resources of Denali National Park and Preserve, including harm to the vegetation resources.
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The National Park Service (NPS) approved the use of Calcium Chloride as a dust suppressant on the Park road after four years of research. A formal monitoring program to track the spatial and temporal movement of CaCl2 concentrations along the Park road began in 2005. Fifteen terrestrial sites and fourteen water body locations were selected to monitor the movement of chloride from the roadbed into roadside soils and surface waters. Initial results showed wide variability in chloride concentrations in soil adjacent to the roadbed, while waterbodies generally had low concentrations (ABR 2006). This report presents 2007 results for the dust palliative chloride monitoring program.During the summer of 2007, 35 applications...
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PURPOSE: The deployment of a national missile defense (NMD) program in Alaska, California, Massachusetts, and North Dakota is considered. The NMD system would be a fixed, land-based, non-nuclear missile defense system with a land- and space-based detection system capable of responding to limited strategic ballistic missile threats to the United States. The proposed Alaskan sites include Clear Air Force Station (AFS) in Denali Borough, Eareckson Air Station (AS) on Shemya Island, Eielson Air Force Base (AFB) in Fairbanks North Star Borough, Fort Greely, and Yukon Training Area in Fairbanks North Star Borough. The proposed California site is Beale AFB. The proposed Massachusetts site is Cape Cod AFS. The proposed...


map background search result map search result map Fish habitats and use in the Tanana River floodplain near Big Delta, Alaska, 1999-2000 Ecological effects of invasive European bird cherry (Prunus padus) on salmonid food webs in Anchorage, Alaska streams Biogeography of select avian species in Alaska’s National Parks Differences in Ecosystem Carbon Distribution and Nutrient Cycling Linked to Forest Tree Species Composition in a Mid-Successional Boreal Forest Moose: Competing and Complementary Values Methods and tools for addressing natural disturbance dynamics in conservation planning for wilderness areas Biological control of the ambermarked birch leafminer (Profenusa thomsoni) in Alaska Fishery Management Report for Sport Fisheries in the Lower Yukon-lower Kuskokwim Management Area for 1999 and 2000 Invasive plant management in Yukon-Charley Rivers National Preserve and Gates of the ARctic National Park and Preserve: 2011 Summary Report All-Terrain Vehicle (ATV) Trail Mitigation Study: Comparison of Natural and Geosynthetic Materials for Surface Hardening within Wrangell-St Elias National Park and Preserve, Alaska Soil environment characteristics inventory and long-term monitoring in the Rock Creek Watershed, Denali National Park and Preserve, Alaska Monitoring chloride migration from dust palliative applications on the Park road, Denali National Park and Preserve, Alaska: 2007 summary report Neversweat Prospect: Cultural Landscape Inventory, Denali National Park, National Park Service Cooperative Monitoring of River Flow on the Nabesna River (CAKN Streams & Rivers Resource Brief) Interspecies and interregional comparisons of the chemistry of PAHs and trace elements in mosses Hylocomium splendens (Hedw.) B.S.G. and Pleurozium schreberi (Brid.) Mitt. from Poland and Alaska Range overlap and individual movements during breeding season influence genetic relationships of caribou herds in south-central Alaska Raptor populations inventory - bald eagles Brief Summary of Impacts of Snowmachine Traffic on Vegetation in Denali National Park Sonar estimation of chum salmon passage in the Aniak River, 2009 NATIONAL MISSILE DEFENSE DEPLOYMENT; FORT GREELY, SHEMYA ISLAND, AND DENALI AND FAIRBANKS NORTH STAR BOROUGHS, ALASKA, CALIFORNIA, MASSACHUSETTS, AND CAVALIER, GRAND FORKS, PEMBINA, RAMSEY, AND WALSH COUNTIES, NORTH DAKOTA Differences in Ecosystem Carbon Distribution and Nutrient Cycling Linked to Forest Tree Species Composition in a Mid-Successional Boreal Forest Raptor populations inventory - bald eagles Soil environment characteristics inventory and long-term monitoring in the Rock Creek Watershed, Denali National Park and Preserve, Alaska Monitoring chloride migration from dust palliative applications on the Park road, Denali National Park and Preserve, Alaska: 2007 summary report Neversweat Prospect: Cultural Landscape Inventory, Denali National Park, National Park Service Brief Summary of Impacts of Snowmachine Traffic on Vegetation in Denali National Park Range overlap and individual movements during breeding season influence genetic relationships of caribou herds in south-central Alaska Fish habitats and use in the Tanana River floodplain near Big Delta, Alaska, 1999-2000 All-Terrain Vehicle (ATV) Trail Mitigation Study: Comparison of Natural and Geosynthetic Materials for Surface Hardening within Wrangell-St Elias National Park and Preserve, Alaska Cooperative Monitoring of River Flow on the Nabesna River (CAKN Streams & Rivers Resource Brief) Interspecies and interregional comparisons of the chemistry of PAHs and trace elements in mosses Hylocomium splendens (Hedw.) B.S.G. and Pleurozium schreberi (Brid.) Mitt. from Poland and Alaska Invasive plant management in Yukon-Charley Rivers National Preserve and Gates of the ARctic National Park and Preserve: 2011 Summary Report Fishery Management Report for Sport Fisheries in the Lower Yukon-lower Kuskokwim Management Area for 1999 and 2000 Biogeography of select avian species in Alaska’s National Parks Moose: Competing and Complementary Values Methods and tools for addressing natural disturbance dynamics in conservation planning for wilderness areas NATIONAL MISSILE DEFENSE DEPLOYMENT; FORT GREELY, SHEMYA ISLAND, AND DENALI AND FAIRBANKS NORTH STAR BOROUGHS, ALASKA, CALIFORNIA, MASSACHUSETTS, AND CAVALIER, GRAND FORKS, PEMBINA, RAMSEY, AND WALSH COUNTIES, NORTH DAKOTA