A5052706200- Forest Ecology and Biodiversity Studies
- Forest Management and Policy
- Fire effects on ecosystems
- Tree-ring climate responses
- Forest ecology and management
- Cryospheric studies and observations
- Tree Root and Stability Studies
- Landslides and related hazards
- Soil erosion and sediment transport
- Indigenous Studies and Ecology
- Arctic and Antarctic ice dynamics
- Rangeland and Wildlife Management
- Soil and Water Nutrient Dynamics
- Plant Water Relations and Carbon Dynamics
- Hydrology and Sediment Transport Processes
- Marine animal studies overview
- Peatlands and Wetlands Ecology
- Environmental Conservation and Management
- Pesticide and Herbicide Environmental Studies
- Conservation, Biodiversity, and Resource Management
- Climate change and permafrost
- Ecology and Vegetation Dynamics Studies
- Lichen and fungal ecology
- Winter Sports Injuries and Performance
- Fish Ecology and Management Studies
Pacific Northwest Research Station
2000-2022
US Forest Service
2002-2022
University of Alaska Southeast
2000-2014
Washington Center
2002
Washington Department of Natural Resources
2002
Oregon State University
2000
HR Wallingford
1999
British Antarctic Survey
1998
Natural Environment Research Council
1998
University of Chicago
1933
ABSTRACT: More than 300 landslides and debris flows were triggered by an October 1993 storm on Prince of Wales Island, southeast Alaska. Initiation, runout, deposition patterns that occurred within clearcuts, second‐growth, old‐growth forests examined. Blowdown snags, associated with cedar decline “normal” rates mortality, found adjacent to at least 75 percent all failures regardless land use. Nearly 50 the clearcuts one year following timber harvest; more 70 these sites had hydrophytic...
Abstract The relative importance of suspended (>0.45 µm) and organic colloidal (<0.45 matter in the transport pesticide through across a soil was studied by monitoring from lysimeters over winter (1994–1995) relating it to leaching pesticides. major results were: (i) sediment appeared at different times leachate. (ii) enriched total carbon (TOC). (iii) occurred largely first few samples following rainfall, coinciding with occurrence matter. (iv) Modelling distribution between colloids,...
Ongoing revitalization of the >5000-year-old tradition using trees for vital culture and heritage activities including carving weaving affirms Alaska Native resilience. However, support these sustained cultural practices is complicated by environmental political factors. Carving projects typically require western redcedar (Thuja plicata) or yellow cedar (Callitropsis nootkatensis) more than 450 years age—a tree life stage growth rate inconsistent with current even-aged forest management...
Level-line surveys at a number of sites on the Antarctic Peninsula since early 1970s have shown lowering ice surface elevation in areas where climate is warm enough for melting to occur during summer. Results are presented here from annual ramp Rothcra Point. Over an 8 year period, large proportion shows generally steady reduction elevation. The uppermost part no clear trend. has suffered mean rate ofsurfaee 0.32 ma −1 w.e. over period surveys, which similar that seen other Peninsula....
Microsites, local features having the potential to alter environment for seedling regeneration, may help define likely trends in high-elevation forest regeneration pattern. Although multiple microsites exist any alpine treeline ecotone (ATE) on continent, some appear enhance density of better than others. Known stresses ATE include low temperature, substrate moisture, high radiation, drought, wind, and both snowfall amount. Relationships among various microsite types, annual precipitation,...
Abstract Forested landscapes support a diversity of ecological processes and organisms having direct value to society. Assessments placing monetary on forest can help inform management actions affecting these ecosystem services. The temperate rain ecoregion along the west coast North America is home five species Pacific salmon Oncorhynchus spp. that subsistence, personal‐use, sport, commercial fisheries. This study aimed quantify number commercially caught originating from Alaska's Tongass...
Although climate warming is generally expected to facilitate upward advance of forests, conifer seedling regeneration and survival may be hindered by low substrate moisture, high radiation, both snow accumulation. To better understand substrate-related factors promoting in the alpine treeline ecotone, this study compared 2 substrates supporting seedlings: rotten downed wood adjacent soil. Study locations, each with 3 levels incoming were randomly selected at forest line–alpine meadow borders...
Abstract: Timber harvest may contribute to increased landsliding frequency through soil saturation or loss of strength as roots decay. This study assessed the effects forest on hillslope hydrology and linked hydrologic change before after with a simple model stability. Observations peak water table heights in 56 ground‐water monitoring wells showed that levels hillslopes differed significantly intensity at one two locations following 25%, 75%, 100% harvest. Before was cut 100%, average...
Factors (riparian stand condition, management regimes, and channel properties) affecting distributions of wood, detritus (leaves branches), sediment were examined in headwater streams draining young-growth red alder (Alnus rubra Bong.) conifer riparian forests (< 40 years old) southeast Alaska. More found along affected by both timber harvesting mass movement than alone. Young-growth stands produced little large wood material (diameter ≥10 cm) had effect on altering the size...
The importance of climate warming on forests is recognized worldwide and has increased attention the significance both timberline advance alpine meadow invasion by forests. Successful seedling regeneration in meadows depends availability suitable substrates, or microsites, for establishment. We sought to determine whether wood microsites (i.e., nurse logs), which are sites Pacific Northwest subalpine forests, promoted at timberline-alpine borders. To ecological role we examined mechanisms...
Johnson, A.C.; Noel, J.; Gregovich, D.P.; Kruger, L.E., and Buma, B., 2019. Impacts of submerging emerging shorelines on various biota indigenous Alaskan harvesting patterns. Journal Coastal Research, 35(4), 765–775. Coconut Creek (Florida), ISSN 0749-0208.Future alongshore benthic species shoreline lengths undergoing both sea level rise relative lowering (postglacial isostatic rebound) where SE Alaska Natives regularly conduct traditional cultural harvests were approximated. From 30-km...