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The northern treeline is generally limited by available warmth. However, in recent years, more and more studies have identified drought stress as an additional limiting factor for tree growth in northern boreal forests and at treelines. Three growth responses to warming have been identified: increase in growth, decrease in growth, and nonsignificant correlation of tree growth with climate. Here we investigate the effect of drought stress on radial growth of white spruce at northern treelines along a longitudinal gradient spanning the entire Brooks Range in Alaska. We systematically sampled 687 white spruce at seven treeline sites. Where possible, we sampled three site types at a given site: high-density forest,...
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Summary: "Total Hg (THg) and methylmercury (MeHg) were examined in muscle and liver samples of salmon species (Chinook: Oncorhynchus tshawytscha; Chum: O. keta; Sockeye: O. nerka; Coho: O. kisutch) and freshwater fish species (Pike: Esox lucius; Grayling: Thymallus arcticus; Whitefish: Caregonus nelsoni) collected in 1999 and 2000 from the Western Alaska rivers (Yukon, Kuskokwim, Nushagak and Kvichak). The THg in salmon muscles has a mean value of 62 ng/g (ww). In Pike muscles, THg has a mean value of 879 ng/g. The mean concentrations of THg in Grayling and Whitefish muscle are 153 ng/g and 32 ng/g respectively. In salmon muscle and liver the MeHg levels constitute 77% and 62% of the THg levels, respectively. In...
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All parties to the subsistence controversy in Alaska (the state and the federal government, sportsmen’s associations, outdoor organizations, and Native groups) have assumed that the Alaska National Interest Lands Conservation Act (ANILCA) grants residents of rural Alaska an exclusive right to engage
map background search result map search result map Assessment of total mercury and methyl mercury in selected subsistence fish in Western Alaska Grizzly bear food plant/habitat suitability model for the Atlin Lake and Taku River watersheds (Version 1.0) Land cover disturbances and feedbacks to the climate system in Canada and Alaska Upper Cook Inlet commercial herring and smelt fisheries, 2004 Deformation driven by subduction and microplate collision: geodynamics of Cook Inlet basin, Alaska Spectral decomposition and inversion : case study of a production area in the Cook Inlet Basin, Alaska, USA Stock assessment of late-run Chinook salmon in the Kenai River, 1999-2006 Chisana Caribou Range Lichen Assessment, September, 2011 Quaternary glacial, lacustrine, and fluvial interactions in the western Noatak basin, northwest Alaska Effects of Spatial Aggregation of Initial Conditions and Forcing Data on Modeling Snowmelt Using a Land Surface Scheme Density dependence in an experimental boreal forest understory community Population dynamics of black spruce and white spruce near the arctic tree line in the southern Brooks Range, Alaska Longitudinal variation of radial growth at Alaska's northern treeline; recent changes and possible scenarios for the 21st century Population dynamics of interior and southwest Alaska caribou herds Glacial transport of human waste and survival of fecal bacteria on Mt. McKinley’s Kahiltna Glacier, Denali National Park, Alaska Growing together: A principle-based approach to building collaborative Indigenous partnerships in Canada’s forest sector Impacts of Climate Warming on River Ice Break-up and Snowmelt Freshet Processes on the Porcupine River in Northern Yukon Effects of Spatial Aggregation of Initial Conditions and Forcing Data on Modeling Snowmelt Using a Land Surface Scheme Impacts of Climate Warming on River Ice Break-up and Snowmelt Freshet Processes on the Porcupine River in Northern Yukon Density dependence in an experimental boreal forest understory community Stock assessment of late-run Chinook salmon in the Kenai River, 1999-2006 Chisana Caribou Range Lichen Assessment, September, 2011 Grizzly bear food plant/habitat suitability model for the Atlin Lake and Taku River watersheds (Version 1.0) Glacial transport of human waste and survival of fecal bacteria on Mt. McKinley’s Kahiltna Glacier, Denali National Park, Alaska Quaternary glacial, lacustrine, and fluvial interactions in the western Noatak basin, northwest Alaska Deformation driven by subduction and microplate collision: geodynamics of Cook Inlet basin, Alaska Upper Cook Inlet commercial herring and smelt fisheries, 2004 Spectral decomposition and inversion : case study of a production area in the Cook Inlet Basin, Alaska, USA Population dynamics of black spruce and white spruce near the arctic tree line in the southern Brooks Range, Alaska Longitudinal variation of radial growth at Alaska's northern treeline; recent changes and possible scenarios for the 21st century Population dynamics of interior and southwest Alaska caribou herds Assessment of total mercury and methyl mercury in selected subsistence fish in Western Alaska Land cover disturbances and feedbacks to the climate system in Canada and Alaska Growing together: A principle-based approach to building collaborative Indigenous partnerships in Canada’s forest sector