Northern Tree Habitats - Geophysical Institute
2024年11月27日 · However, after seven growing seasons in Fairbanks, trees from the most northern homelands of the Dezadeash, Carmacks and Mayo areas of the Yukon are among the tallest, and the early starters from the south are now ranked at the bottom; although some of the trees from the Ft. Nelson area of British Columbia have maintained their relatively fast ...
Cottonwood and Balsam Poplar - Geophysical Institute
2024年11月27日 · 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 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.
More on Why Tree Trunks Spiral - Geophysical Institute
2024年11月27日 · 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. It is well known that you can make it spiral out in either direction, if you give it a little shove first.
Burls - Geophysical Institute
2024年11月22日 · Trees with burls seem to be found in a cluster; if one tree in an area has burls, it is likely that other trees around it has them too. This clumping is suggestive of leafhoppers or aphids transmitting the disease, but no conclusive evidence of this is known yet. Burls weaken trees but do not kill them.
Feltleaf willows: Alaska’s most abundant tree
2024年11月22日 · 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.
The majesty and mystery of Alaska yellow cedar
2021年7月23日 · These trees, which can live longer than 1,000 years, grow on the rainy coast from the Oregon/California border through British Columbia and as far north as Prince William Sound. The giants have in many areas died in large numbers, puzzling scientists who later came up with a non-intuitive theory of what killed them.
The Kodiak Treeline - Geophysical Institute
2024年11月27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 forest. In recent years, trees have been planted at military bases along the chain, and the State is now shipping out seedlings for reforestation projects all over Alaska.
Black Spruce - Geophysical Institute
2024年11月27日 · Black spruce are the climax trees on cold, poorly drained soils in Alaska and Yukon. They rarely exceed 45 feet (15 meters) in height or 9 inches (23 centimeters) in diameter. In a typical stand, the diameter of most trees is less than 5 inches, and growth is very slow. Half the trees in a 30-year-old stand may be less that 2 inches in diameter.
Southcentral Alaska: a Natural Experiment in Plant Succession
1996年4月18日 · About 9,100 years ago, white and black spruce trees made it to Southcentral. Ager said the winged seeds of both tree species probably blew down through mountain passes from the unglaciated Interior. Once white and black spruce made it through the Alaska Range, the trees migrated southward at a rate of eight-tenths of a kilometer per year.
Visit to an exotic tree plantation in Alaska
2021年6月18日 · These exotic trees — some now 70 feet tall — are a nice legacy for the men who planted shin-high seedlings years before Woodward last visited the plot in 1981. Les Viereck, a renowned ecologist who wrote Alaska Trees and Shrubs, died in 2008.