Cottonwood and Balsam Poplar - Geophysical Institute
6 天之前 · The Klukwan giant holds the national record for black cottonwood diameter. Its nearest rival, a tree near Salem, Oregon, does hold the national height record. The Klukwan giant …
More on Why Tree Trunks Spiral - Geophysical Institute
2024年11月7日 · More on Why Tree Trunks Spiral. August 25, 1986 / Larry Gedney. In an earlier column , I asked if any readers could explain why the grain in trees seemed to spiral up the …
Northern Tree Habitats - Geophysical Institute
2024年11月7日 · Northern Tree Habitats. February 25, 1982 / Susan Brook. Interior Alaskan forests have only six native tree species: white spruce, black spruce, quaking aspen, balsam …
Feltleaf willows: Alaska’s most abundant tree
2023年5月25日 · The most plentiful moose food in the state — and probably Alaska’s most numerous tree — is the feltleaf willow, which was once called the Alaska willow. As its name …
Trees as Earthquake Fault Indicators - Geophysical Institute
2024年11月7日 · Trees along faults often are killed by drowning because the faults tend to collect normal drainage water. In some instances, there are widespread tree kills caused by general …
The Kodiak Treeline - Geophysical Institute
2024年11月7日 · 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 …
Tree line changes on the Kenai Peninsula | Geophysical Institute
2008年2月6日 · The gradual change in tree line is one of many that people have noticed on the Kenai Peninsula in recent years. The most obvious is the 1980s-to-1990s Spruce bark beetle …
Tropical Fossils in Alaska - Geophysical Institute
6 天之前 · 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. …
Fast-Growing Trees - Geophysical Institute
2024年11月7日 · Fast-Growing Trees. July 21, 1976 / John Zasada. One has the impression that trees in Alaska grow very slowly and cling to life by a thread because of the long, cold winters …
Burls - Geophysical Institute
2024年11月7日 · Burls, spherical woody growths on the trunks of spruce, birch and other trees, are commonly found throughout wooded parts of Alaska. Many are removed from trees and …