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Reports the results of fall 2003 chum salmon, Oncorhynchus keta, fish wheel mark-recapture studies on the Tanana and Kantishna Rivers.
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The Alaska Division of Public Health recommends the continued unrestricted consumption of traditional subsistence foods in Alaska. Traditional foods provide inexpensive and readily available nutrients, essential fatty acids, antioxidants, calories and protein and many health benefits such as protection from diabetes, cardiovascular disease, improved maternal nutrition, and neonatal and infant brain development. Presence of heavy metals and persistent, man-made chemicals in the arctic food chain generated concerns about the potential threat to the ecosystem and risk to human health. The global distribution of man-made pollutants through atmospheric transport is well documented; human exposures to them in the arctic...
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High-latitude northern ecosystems are experiencing rapid climate changes, and represent a large potential climate feedback because of their high soil carbon densities and shifting disturbance regimes. A significant carbon flow from these ecosystems is soil respiration (RS, the flow of carbon dioxide, generated by plant roots and soil fauna, from the soil surface to atmosphere), and any change in the high-latitude carbon cycle might thus be reflected in RS observed in the field. This study used two variants of a machine-learning algorithm and least squares regression to examine how remotely-sensed canopy greenness (NDVI), climate, and other variables are coupled to annual RS based on 105 observations from 64 circumpolar...
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Carbon emissions from boreal forest fires are projected to increase with continued warming and constitute a potentially significant positive feedback to climate change. The highest consistent combustion levels are reported in interior Alaska and can be highly variable depending on the consumption of soil organic matter. Here we present an approach for quantifying emissions within a fire perimeter using remote sensing of fire severity. Combustion from belowground and aboveground pools was quantified at 22 sites (17 black spruce and five white spruce-aspen) within the 2010 Gilles Creek burn in interior Alaska, constrained by data from eight unburned sites. We applied allometric equations and estimates of consumption...
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Frost heaving is ubiquitous throughout cold regions, causing damage to building foundations, roads, airfields, railways, utilities, and pipelines. Out of the voluminous body of research conducted over the last 80 years, few studies investigated the mineral surface effects on frost heaving. These previous studies were conducted nearly 50 years ago with rudimentary equipment and on homogeneous and artificial soils that have limited applicability to actual field conditions. The purpose of the research presented here is to investigate the adsorbed cation effects on the frost susceptibility of natural soils through experimental testing. A comprehensive suite of laboratory experiments was conducted on five natural heterogeneous...
map background search result map search result map Geological-Geochemical Follow-up Investigations of a Skarn Gold Showing and Reported Higher than Background Airborne Uranium Radiometric Reading and uraniferous sampling on Upper Union Creek, Centered at 59 36.416” North and 133 14.211” West, Atlin Mining Division, British Columbia, Canada A review of Canadian forest vegetation management research and practice Grizzly bear habitat suitability model for the Atlin Lake and Taku River watersheds: Appendix A–summary of grizzly bear habitat suitability ratings based on food plants (Version 1.0) Fall chum salmon abundance estimation on the Tanana and Kantishna Rivers using mark-recapture techniques, 2003 The harvest of non-salmon fish by residents of Aniak and Chuathbaluk, Alaska, 2001-2003 Interim Long-Term Aquatic Monitoring Program for United Keno Hill Mines Multi-Year Lags between Forest Browning and Soil Respiration at High Northern Latitudes Experimental study of adsorbed cation effects on the frost susceptibility of natural soils Quantifying fire-wide carbon emissions in interior Alaska using field measurements and Landsat imagery The Role of Large Fires in the Canadian Boreal Ecosystem Population dynamics and epidemiology of four species of Dendroctonus (Coleoptera: Curculionidae): 100 years since J.M. Swaine Why Do the Boreal Forest Ecosystems of Northwestern Europe Differ from Those of Western North America? Hegemonic and emerging concepts of conservation: a critical examination of barriers to incorporating Indigenous perspectives in protected area conservation policies and practice Who's who in the Kenai River Fishery SES: A streamlined method for stakeholder identification and investment analysis Quantifying fire-wide carbon emissions in interior Alaska using field measurements and Landsat imagery Who's who in the Kenai River Fishery SES: A streamlined method for stakeholder identification and investment analysis Interim Long-Term Aquatic Monitoring Program for United Keno Hill Mines Why Do the Boreal Forest Ecosystems of Northwestern Europe Differ from Those of Western North America? Geological-Geochemical Follow-up Investigations of a Skarn Gold Showing and Reported Higher than Background Airborne Uranium Radiometric Reading and uraniferous sampling on Upper Union Creek, Centered at 59 36.416” North and 133 14.211” West, Atlin Mining Division, British Columbia, Canada Grizzly bear habitat suitability model for the Atlin Lake and Taku River watersheds: Appendix A–summary of grizzly bear habitat suitability ratings based on food plants (Version 1.0) Experimental study of adsorbed cation effects on the frost susceptibility of natural soils The harvest of non-salmon fish by residents of Aniak and Chuathbaluk, Alaska, 2001-2003 Hegemonic and emerging concepts of conservation: a critical examination of barriers to incorporating Indigenous perspectives in protected area conservation policies and practice Fall chum salmon abundance estimation on the Tanana and Kantishna Rivers using mark-recapture techniques, 2003 Multi-Year Lags between Forest Browning and Soil Respiration at High Northern Latitudes A review of Canadian forest vegetation management research and practice Population dynamics and epidemiology of four species of Dendroctonus (Coleoptera: Curculionidae): 100 years since J.M. Swaine The Role of Large Fires in the Canadian Boreal Ecosystem