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  • 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
  • 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
  • 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
  • New way to spot beetle-killed spruce can help forest, wildfire managers . . .
    A new machine-learning system developed at the University of Alaska Fairbanks can automatically produce detailed maps from satellite data to show locations of likely beetle-killed spruce trees in Alaska, even in forests of low and moderate infestation where identification is otherwise difficult
  • The secret life of red squirrels | Geophysical Institute
    Stan Boutin has climbed more than 5,000 spruce trees in the last 30 years He has often returned to the forest floor knowing if a ball of twigs and moss within the tree contained newborn red squirrel pups Over the years, those squirrels have taught Boutin and his colleagues many things, including an apparent ability to predict the future
  • The largest black spruce in Alaska | Geophysical Institute
    The Alaska champion black spruce tree stands on the campus of the University of Alaska Fairbanks The tree lives in a mixed forest next to large white spruce trees, mature birch and a few alders and willows The tree leans uphill, and its trunk is 45 inches around When I hugged it, I could barely clasp my hands together
  • Black Spruce | Geophysical Institute
    Somehow black spruce trees seem like the jackasses of the northern forests--sort of ungainly looking, ugly little beasts that somehow can survive under conditions prohibitive to the taller and more elegant birches and white spruce But, like donkeys, black spruce have their likable and interesting qualities
  • Tamarack -- Not A Dead Spruce | Geophysical Institute
    When one of these trees finds itself on a better site, however, it shows a remarkable change of pace Individual tamarack growing in white spruce stands may achieve a size comparable to white spruce 100 to 150 years old The current record tamarack in Alaska stands near mile 311 of the Richardson Highway
  • Maverick red aspens in a world of gold | Geophysical Institute
    From the solution of liquid leaves, they determined that a sugary red pigment was indeed present in red and orange aspens, but not in yellow aspens The scientists hinted that the red occurs on only some trees, meaning it is probably a genetic trait — a red aspen is sort of like a person with red hair
  • 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





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