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Northern pike, Esox lucius, are not native to aquatic habitats of southcentral Alaska south of the Alaska Range. Introduction of northern pike into these freshwater systems may have deleterious effects on native fish, including various species of Pacific salmon. This report summarizes the continued effort to restore salmonid habitat by removing invasive northern pike from four freshwater lakes on the Kenai Peninsula.
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This report describes the work performed by the Alaska Exotic Plant Management Team at Wrangell-St. Elias National Park and Preserve during the 2010 season. Six Alaska Exotic Plant Management Team staff members were stationed at Park Headquarters in Copper Center while working at various locations within the park and preserve. Invasive plant inventories and treatments occurred around the following locations: along the McCarthy and Nabesna roads, along the Copper, Chitina, and Nizina rivers, at other locations in the Copper Basin, and at several backcountry destinations within park lands. Invasive plant infestations were mapped using Trimble GeoXT units and manual weeding was performed with the help of volunteers,...
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The ambermarked birch leafminer, Profenusa thomsoni Konow (Hymenoptera: Tenthredinidae), was first discovered in Alaska in 1991 but was not correctly identified until 1996 when it invaded Anchorage and became a widespread and damaging pest to forest and urban birches. In 2003, the parasitoid wasp, Lathrolestes thomsoni Reshchikov (Hymenoptera: Ichneumonidae), was selected as a candidate for a classical biological control program against P. thomsoni. Parasitized leafminer larvae were collected from the Northwest Territories and Alberta, Canada, where it was previously introduced and causing injury to Betula spp., and transferred to Alaska in soil as pre-pupae for emergence. From 2004 to 2008, 3636 adult L. thomsoni...
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Alaska has one of the most rapidly changing climates on earth and is experiencing an accelerated rate of human disturbance, including resource extraction and transportation infrastructure development. Combined, these factors increase the state’s vulnerability to biological invasion, which can have acute negative impacts on ecological integrity and subsistence practices. Of growing concern is the spread of Alaska’s first documented freshwater aquatic invasive plant Elodea spp. (elodea). In this study, we modeled the suitable habitat of elodea using global and state-specific species occurrence records and environmental variables, in concert with an ensemble of model algorithms. Furthermore, we sought to incorporate...
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Until recently, baseline information on the numbers and distribution of exotic plants in Alaska’s national parks was lacking, and factors influencing their establishment and spread were poorly understood (Spencer 2001). The purpose of fieldwork during summer 2003 was to survey areas of current and historical human use within Wrangell-St. Elias National Park and Preserve (WRST) and add to a statewide database containing the locations and identities of exotic vascular plants encountered in these areas. In addition, I initiated data collection for my masters thesis to determine factors influencing the diversity and abundance of exotic plants species in areas of anthropogenic disturbance in WRST. This report details...
The increasing trends in aerosol concentrations observed by the Interagency Monitoring of Protected Visual Environments (IMPROVE) network in the wilderness areas along the Gulf of Alaska during low insolation periods and in Denali National Park and Preserve (Denali NP) during high insolation periods have raised the concerns about air quality degradation and visibility impairment in these pristine areas. This dissertation aims to investigate the reason for those observed increases in aerosol concentrations in Alaska wilderness areas by performing a series of simulation sets with the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem). These simulation sets use the same meteorological conditions...
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The Alaska Natural Heritage Program (AKNHP), University of Alaska Anchorage, visited Rohn Cabin 31 July 2013 to inventory and remove non-native plant species from BLM property at the site. This is the fourth year in which AKNHP has surveyed and treated non-native plants at Rohn Cabin. The ongoing treatment and survey activities occur for several reasons. First, this remote location is a hub of activity during the Iditarod Trail Sled Dog Race; many people and large amount of materials are introduced to the site, including straw for sled dog bedding, which is a known vector for invasive plant propagules. This is a relatively well-known stop along the Iditarod Trail, and successful weed treatment here may encourage...
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This report describes the work performed by the Exotic Plant Management Team (EPMT) at Wrangell-St. Elias National Park and Preserve (WRST) during the 2009 season. Four EPMT members were stationed at three locations in the park: Copper Center, Slana, and McCarthy-Kennecott. Invasive plant inventories and weeding occurred around these three locations, along the McCarthy and Nabesna Roads, along the Copper River, at other locations in the Copper Basin, and at seven backcountry destinations within the park. Invasive plant populations were mapped using GeoXT Trimble units and manual weeding was performed with the help of volunteers, a Southeast Alaska Guidance Association (SAGA) crew, and seasonal National Park Service...
map background search result map search result map Monitoring & controlling invasive plants at Rohn Cabin: 2013 update Non-native plant surveys on public lands affected by forest fires 2009-2010 The Status and Management of Exotic and Invasive Species in National Wildlife Refuge Wilderness Areas Control and removals of invasive norther pike on the Kenai Peninsula, 2004 Alaska aquatic plant survey report 2005 A Network Model to Help Land Managers Predict and Prevent Spread of Invasive Plants from Roads to River Systems in Alaska Introduction, establishment, and impact of Lathrolestes thomsoni (Hymenoptera: Ichneumonidae) for biological control of the ambermarked birch leafminer, Profenusa thomsoni (Hymenoptera: Tenthredinidae), in Alaska Results of the 2007 invasive plants roadside inventory in Yukon Invasive plant management for Wrangell-St. Elias National Park & Preserve: 2010 Summary report.  Exotic Plants in Alaska National Parks: 2003 Field Season Report Invasive plant management in Wrangell-St. Elias National Park & Preserve: 2012 summary report Exotic Plant Management in Wrangell-St. Elias National Park & Preserve: 2005 Field Season Report Invasive and exotic species management for Wrangell-St. Elias National Park and Preserve: 2009 Summary report Integrating subsistence practice and species distribution modeling: assessing invasive elodea’s potential impact on Native Alaskan subsistence of Chinook salmon and whitefish Sensitivity to herbicide in the north: toxicity of imazapyr and triclopyr to Yukon ROW target and non-target plants Monitoring & controlling invasive plants at Rohn Cabin: 2013 update Control and removals of invasive norther pike on the Kenai Peninsula, 2004 Sensitivity to herbicide in the north: toxicity of imazapyr and triclopyr to Yukon ROW target and non-target plants Invasive plant management for Wrangell-St. Elias National Park & Preserve: 2010 Summary report.  Exotic Plants in Alaska National Parks: 2003 Field Season Report Invasive plant management in Wrangell-St. Elias National Park & Preserve: 2012 summary report Exotic Plant Management in Wrangell-St. Elias National Park & Preserve: 2005 Field Season Report Invasive and exotic species management for Wrangell-St. Elias National Park and Preserve: 2009 Summary report Introduction, establishment, and impact of Lathrolestes thomsoni (Hymenoptera: Ichneumonidae) for biological control of the ambermarked birch leafminer, Profenusa thomsoni (Hymenoptera: Tenthredinidae), in Alaska Alaska aquatic plant survey report 2005 Non-native plant surveys on public lands affected by forest fires 2009-2010 Results of the 2007 invasive plants roadside inventory in Yukon Integrating subsistence practice and species distribution modeling: assessing invasive elodea’s potential impact on Native Alaskan subsistence of Chinook salmon and whitefish A Network Model to Help Land Managers Predict and Prevent Spread of Invasive Plants from Roads to River Systems in Alaska The Status and Management of Exotic and Invasive Species in National Wildlife Refuge Wilderness Areas