The secret life of red squirrels | Geophysical Institute
Nov 27, 2024 · 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 …
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 birch and a few …
Trees for a Cold Climate | Geophysical Institute
Apr 1, 1993 · The hardiest trees rely on physics more than on chemistry to make it through the winter. When the seasonal chill begins to reach black or white spruce, for example, the sap leaves their …
Tamarack -- Not A Dead Spruce | Geophysical Institute
Dec 18, 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 a size comparable …
Black Spruce | Geophysical Institute
Dec 18, 2025 · Somehow black spruce trees seem like the jackasses of the northern forests--sort of ungainly looking, ugly little beasts that somehow can survive under conditions prohibitive to the taller …
Bering Land Bridge wasn’t such a dry place | Geophysical Institute
Feb 20, 2025 · They found evidence of spruce, alder and birch trees, as well as mosses and other plants that grow in the wetter regions of Alaska today. “We were very excited on the ship to find evidence of …
The majesty and mystery of Alaska yellow cedar | Geophysical Institute
Jul 23, 2021 · Here, in a forest a few hundred feet above a shrinking glacier, Gaglioti is felling one of the most enigmatic trees in Alaska: an Alaska yellow cedar. These trees, which can live longer than …
Northern Tree Habitats | Geophysical Institute
Dec 18, 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 and maintain …
Tropical Fossils in Alaska - Geophysical Institute
Dec 18, 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. These …
Leaves | Geophysical Institute
Dec 18, 2025 · Alaskan trees with determinate growth display a burst of activity in June and complete their shoot growth by early July, although their leaves may continue to grow larger as the month …