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  • 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
  • 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
  • Burls - Geophysical Institute
    Burls weaken trees but do not kill them The weakening effect, however, makes the trees vulnerable to other diseases which can kill them Relatively little is known about burls, for several reasons: It takes a long time for a burl to grow--nearly as long as the tree on which it is found--so research is stretched out over a long period of time
  • 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
  • More on Why Tree Trunks Spiral | Geophysical Institute
    Granted, not all trees exhibit the same twist, but the majority of them do The phenomenon can be likened to the claim that water will always spiral out of a drain in a counter-clockwise direction in the northern hemisphere
  • 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
  • Mummified forest tells tale of a changing north - Geophysical Institute
    Pollen samples from lake-bottom muck also show that basswoods, hickories, elms and other trees grew in Alaska and other northern places millions of years ago Those fair-weather trees suggest a very warm period in the far north, while the mummified forest of Ellesmere Island suggests a climate in transition from comfortable to bitter cold
  • Pollen season arrives, blame the trees | Geophysical Institute
    The air is rich with pollen because spring is the mating season for trees The first step in a tree's reproductive dance is to release sperm, safely held in the center of a pollen grain Trees release an incredible amount of pollen to improve the odds of finding a female flower
  • 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
  • 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





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