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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 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
- Formerly Frosty Footing Causes Drunken Forests
In a drunken forest, trees--often pipe-cleaner black spruce--tilt in all directions like a group of rowdy revelers stumbling along the street Unlike pendulous pub patrons, drunken forests aren't caused by beer, but by unique soil conditions found in the north Melting permafrost is the most common cause of the drunken forest
- 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
- 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
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