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 …
The Days of the Shade Trees in Alaska | Geophysical Institute
Aug 26, 1998 · Today, interior Alaska has a climate that allows a handful of tree species to survive. White and black spruce, balsam poplar, aspen, willows and alders are the most common varieties …
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.
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 …
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, …
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 …
Pollen season arrives, blame the trees | Geophysical Institute
May 7, 2008 · The airborne invaders are grains of tree pollen, specks so small that it would take eight of them to cover the period at the end of this sentence. The air is rich with pollen because spring is the …
Boreal owls perform by daylight | Geophysical Institute
Jun 28, 2018 · Just beneath the owl box, hung 20 feet up the stem of a balsam poplar, the backyard barbeque continued late into the evening. Despite the thwap of badminton birdies and the chirp of …