Cottonwood and Balsam Poplar | Geophysical Institute
Dec 18, 2025 · Balsam poplar is the most widespread broadleaf tree in Alaska; it ranges even farther north and west than another close relative, the quaking aspen. Close up, it is easy to distinguish …
Northern Tree Habitats | Geophysical Institute
Dec 18, 2025 · Interior Alaskan forests have only six native tree species: white spruce, black spruce, quaking aspen, balsam poplar, larch (tamarack) and paper birch. Northern Canadian forests have all …
Calling lost chickadees in far north poplars | Geophysical Institute
Aug 28, 2025 · Balsam poplar is the largest tree species on Alaska's North Slope. Photo by Sara Wilbur A gray-headed chickadee feeds along the Canning River in northern Alaska in 2015. Photo by Aaron …
Beavers slapping tails on far-north waters | Geophysical Institute
Nov 16, 2017 · Signs of the American beaver in Alaska: A cut poplar tree on the upper Tanana River and a dam on Phelan Creek near Isabel Pass in the Alaska Range. Ned Rozell photos.
The American robin returns on time | Geophysical Institute
May 22, 2025 · American robins have returned to northern Alaska. A male is now perched above me in a balsam poplar tree on this bench of well-drained land upon which sits the University of Alaska …
Leaves | Geophysical Institute
Dec 18, 2025 · Obviously there is a greater chance of wide variation in the leaves growing from those trees and shrubs such as poplar and highbush cranberry that have indeterminate shoot growth. Also, …
Visit to an exotic tree plantation in Alaska | Geophysical Institute
Jun 18, 2021 · The two-acre exotic tree plantation is part of a much-larger “boreal arboretum” on the UAF campus, which mostly consists of native spruce, birch, aspen, poplar and willow trees. Having …
The largest black spruce in Alaska | Geophysical Institute
Aug 16, 2010 · The tallest trees are not always the winners of The Big Tree Challenge; foresters score trees on height, circumference and the spread of a tree’s crown. The black spruce on the UAF …
Trees for a Cold Climate | Geophysical Institute
Apr 1, 1993 · The forests contain only a handful of families, white spruce, black spruce, poplar, birch, willow, with the odd tamarack or over-grown alder thicket providing scant variety. Back on the …
Aspen miners leave few leaves unturned | Geophysical Institute
Jun 2, 2005 · Aspen leaf miners, tiny insects that turn quaking aspen leaves into silvery medallions, have been thorough in their coverage of interior Alaska the past few years.