Northern Tree Habitats | Geophysical Institute
Jun 26, 2025 · 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 …
Cottonwood and Balsam Poplar | Geophysical Institute
Jun 26, 2025 · 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
Jun 12, 2025 · 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 …
Tropical Fossils in Alaska | Geophysical Institute
Jun 26, 2025 · 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. …
Tree line changes on the Kenai Peninsula - Geophysical Institute
Feb 6, 2008 · Tree line didn’t change much on south-facing slopes, but trees and bushes got denser there. Katrina Timm and Alissa McMahon compared photos of the western Kenai hills …
The largest black spruce in Alaska | Geophysical Institute
Aug 16, 2010 · 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 …
Witches' Broom | Geophysical Institute
Jun 12, 2025 · Witches' broom on spruce trees is caused by a rust disease (a kind of fungus disease). The rust lives on the spruce tree throughout the year. Each spring, small yellow …
Tamarack -- Not A Dead Spruce | Geophysical Institute
Jun 26, 2025 · 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 …
Feltleaf willows: Alaska’s most abundant tree | Geophysical Institute
May 25, 2023 · 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.
Orange trees in the Alaska Range | Geophysical Institute
Sep 3, 2020 · While wandering middle Alaska this summer, I noticed orange spruce trees along the entire length of the Denali Highway, from Paxson to Cantwell.