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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
The Turkey and the Tambalacoque Tree - Geophysical Institute The elderly trees still produced seeds, but none of the seeds gerrninated, even when carefully tended under ideal nursery conditions It was tempting to think the old trees were incapable of producing healthy seeds, but Temple didn't accept that reasoning For one thing, the seeds (and their encasing fruit) looked fine
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
Bark beetles take Connecticut-size bite out of Alaska The result was an area the size of Connecticut in which spruce trees died en masse, giving the forest ecosystem a makeover from which it won’t soon recover Now, most of the beetles are gone, but not because things have cooled down “Conditions are still warm here, but they’ve eaten themselves out of house and home,” Berg said
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
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 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
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