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  • Cottonwood and Balsam Poplar | Geophysical Institute
    The Klukwan giant belies the belief that trees tend to get smaller the farther north one goes Both balsam poplar and cottonwood have value for fuel wood, pulp and lumber
  • Tropical Fossils in Alaska | Geophysical Institute
    Paleobotanist Jack A Wolfe of the United States Geological Survey at Menlo Park, California, has found a number of tropical rain forest fossils along the eastern Gulf of Alaska These include several kinds of palms, Burmese lacquer trees, mangroves and trees of the type that now produce nutmeg and Macassar oil
  • Northern Tree Habitats | Geophysical Institute
    Why take a chance with exotics, when native trees have proven their ability to survive? Several reasons prompt testing of foreign tree species Human activities often create and maintain new, sometimes artificial habitats that native trees are not adapted to Exotics may have strong wood, large fruits or straight boles that are lacking in the
  • Skinny Trees and Paleoforests - Geophysical Institute
    Growth rings in fossilized trees establish the presence of changing seasons, including warm summers, in high latitudes However, a tree growing in the long-gone warm Arctic wouldn't look like a tree growing in the ancient temperate zone Even then, a high-latitude tree would probably be skinny, like the pipecleaner spruce of Alaska's interior
  • Trees as Earthquake Fault Indicators | Geophysical Institute
    A swath of dead, tilted and broken trees now makes obvious the trace of the Fairweather fault that broke in July 1958 to devastate Lituya Bay and nearby parts of southeastern Alaska Sagging or tilting of the ground along a fault trace causes trees there to tilt or even fall
  • Feltleaf willows: Alaska’s most abundant tree | Geophysical Institute
    The range of the feltleaf willow, probably the most numerous tree in Alaska From Alaska Trees and Shrubs by Les Viereck and Elbert L Little, Jr
  • The Kodiak Treeline | Geophysical Institute
    Spruce trees planted on the islands by the Russians in 1805 are doing just fine and reseeding themselves naturally, although the total tree population hardly amounts to a forest
  • Visit to an exotic tree plantation in Alaska | Geophysical Institute
    These exotic trees — some now 70 feet tall — are a nice legacy for the men who planted shin-high seedlings years before Woodward last visited the plot in 1981 Les Viereck, a renowned ecologist who wrote Alaska Trees and Shrubs, died in 2008
  • The varying colors of fall equinox | Geophysical Institute
    These trees are now responding to fewer hours of sunlight by ceasing to flood their leaves with chlorophyll The sudden lack of that green, energy-converting chemical allows the leaves to show red, orange and yellow pigments that were within the leaves all summer
  • Orange trees in the Alaska Range | Geophysical Institute
    While wandering middle Alaska this summer, I noticed orange spruce trees along the entire length of the Denali Highway, from Paxson to Cantwell





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