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  • Alaska Map of Bark Beetle Presence in 2016 and 2017

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (United States Department of Agriculture - US Forest Service, 2019)
    This is a shape file of 68 species locations surveyed by the USFS from 2016 to 2017 that consists of 3 bark beetle species. The geographic projection of the map is NAD 1983 Alaska Albers.
  • Alaska Map of 1-km Space Grid Points

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
    This is a lattice point grid with a 1-km Euclidean distance in a total point number of 1,522,655 in Alaska. The map is prepared as a shape file and the geographic projection is NAD 1983 Alaska Albers.
  • Alaska Map of Bark Beetle Pseudo-Absence

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
    This is a shape file of 5000 pseudo-absence points created across the state of Alaska without prior assumption such as a minimum or a maximum distance between these points or from bark beetle presence locations. The geographic projection is NAD 1983 Alaska Albers.
  • Alaska Map of Bark Beetle Presence

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (University of Alaska Museum; http://arctos.database.museum/SpecimenSearch.cfm, 2019)
    For this study, we created a shape file from 838 records of 68 bark beetle species, as the presence points for the model, provided by the University of Alaska Museum (UAM; http://arctos.database.museum/SpecimenSearch.cfm) as a tabulated file. The year the species were identified varied from 1953 to 2018, with nearly half being observed after 2011. Among the pooled bark beetle species, the most dominant genera were, Dryocoetes (n=133), Trypodendron (n=107), Ips (n=104), and Dendroctonus (n=83) (Appendix I). And, the most common species were the striped ambrosia beetle (Trypodendron lineatum (n=74)), Dryocoetes affaber (n=69), the spruce beetle (Dendroctonus rufipennis (n=66)), and the northern spruce engraver (Ips perturbatus (n=52)). The host evergreen trees from which the bark beetle specimens were collected consisted of white spruce (Picea glauca), black spruce (P. mariana), Sitka spruce (P. sitchensis), western hemlock (Tsuga heterophylla), lodgepole pine (Pinus contorta), mountain hemlock (Tsuga mertensiana), Lutz spruce (P.a x lutzii), Tamarack (Larix laricina), Yellow cedar (Cupressus nootkatensis), and Western red cedar (Thuja plicata)). The geographic projection of the map is NAD 1983 Alaska Albers.
  • Final Map (Figure 7)

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2020)
    This map shows bark beetles absent from mixed and evergreen forests (value 0), present in mixed forest (value 1) and present in evergreen forest (value 2), all as derived from the binary map of model 2 (Figure 6). The 2011 NLCD was the reference map to extract forest type and area across the state of Alaska. The map is prepared at 1 km spatial resolution and the geographic projection is NAD 1983 Alaska Albers.
  • Binary Map (Figure 6)

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2020)
    Classified prediction map of multi-species bark beetle occurrence using 95% confidence interval of validation points to differentiate predicted index of relative occurrence (RIO) of the ecological model (model without spatially-dependent predictors). Value 1 (presence) represents the potential ecological niche and value 0 (absence) represents regions that may not be occupied by scolytines community based on the current climatic conditions and biophysical attributes of the landscape. The map is prepared at 1 km spatial resolution and the geographic projection is NAD 1983 Alaska Albers.
  • Model 3 (Appendix IV)

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2020)
    Predicted distribution map of bark beetles in Alaska using model 3 (model with excluded roads). The map is prepared at 1 km spatial resolution and the geographic projection is NAD 1983 Alaska Albers.
  • Model 2 (Figure 3)

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2020)
    Predicted distribution map of bark beetles in Alaska using model 2 or ecological model (model without spatially-dependent predictors). The map is prepared at 1 km spatial resolution and the geographic projection is NAD 1983 Alaska Albers.
  • Model 1 (Appendix III)

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2020)
    Predicted distribution map of bark beetles in Alaska using model 1 (full model). The map is prepared at 1 km spatial resolution and the geographic projection is NAD 1983 Alaska Albers.
  • Alaska Map of Distance to Infrastructure

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
    The Alaska map of distance to infrastructure is a raster image file that includes Euclidean distance value from the Alaska infrastructure. The map is prepared at 60 m spatial resolution using vector map of the Alaska infrastructure. The geographic projection is NAD 1983 Alaska Albers.
  • Alaska Map of Distance to Main Roads

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
    The Alaska map of distance to main roads is a raster image file that includes Euclidean distance value from the Alaska main roads. The map is prepared at 60 m spatial resolution using vector map of the Alaska main roads. The geographic projection is NAD 1983 Alaska Albers.
  • Alaska Map of Distance to Towns

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
    The Alaska map of distance to towns is a raster image file that includes Euclidean distance value from the Alaska towns and cities. The map is prepared at 60 m spatial resolution using vector map of the Alaska towns and cities. The geographic projection is NAD 1983 Alaska Albers.
  • Alaska Map of Distance to Drainage Network

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
    The Alaska map of distance to drainage network is a raster image file that includes Euclidean distance value from the Alaska drainage network with more ephemeral water channels. The map is prepared at 60 m spatial resolution using vector map of the Alaska drainage network. The geographic projection is NAD 1983 Alaska Albers.
  • Alaska Map of Distance to Lakes and Rivers

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
    The Alaska map of distance to lakes and rivers is a raster image file that includes Euclidean distance value from the Alaska lakes and rivers with more permanently standing or flowing water. The map is prepared at 60 m spatial resolution using vector map of the Alaska lakes and rivers. The geographic projection is NAD 1983 Alaska Albers.
  • Alaska Map of Distance to Coastline

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
    The distance to coastline map of Alaska is a raster image file that includes Euclidean distance value from the Alaska coastline. The map is prepared at 60 m spatial resolution using vector map of the Alaska coastline. The geographic projection is NAD 1983 Alaska Albers.
  • Alaska Aspect Map

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
    The aspect map is a raster image file that includes aspect value at 60 m spatial resolution derived from the Alaskan Digital Elevation Model (DEM). The geographic projection is NAD 1983 Alaska Albers.
  • Alaska Slope Map

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
    The slope map is a raster image file that includes slope value at 60 m spatial resolution derived from the Alaskan Digital Elevation Model (DEM). The geographic projection is NAD 1983 Alaska Albers.
  • Alaska Digital Elevation Model (DEM)

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2019)
    The Digital Elevation Model (DEM) is a raster image file that includes elevation value at 60 m spatial resolution. The geographic projection is NAD 1983 Alaska Albers.
  • Alaska Mean Monthly Temperature in 2010

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2010)
    The folder includes 2010 average monthly temperature across the state of Alaska as a raster image file. The spatial resolution is 60 m and the geographic projection is NAD 1983 Alaska Albers.
  • Alaska Mean Monthly Precipitation in 2010

    Zabihi, Khodabakhsh; Huettmann, Falk; Young, Brian (2010)
    The folder includes 2010 average monthly precipitation across the state of Alaska as a raster image file. The spatial resolution is 60 m and the geographic projection is NAD 1983 Alaska Albers.

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