http://www.bing.com:80/search?q=Tree+Chart+Audio+Visual+AidsSearch resultshttp://www.bing.com:80/s/a/rsslogo.gifhttp://www.bing.com:80/search?q=Tree+Chart+Audio+Visual+AidsCopyright © 2026 Microsoft. All rights reserved. These XML results may not be used, reproduced or transmitted in any manner or for any purpose other than rendering Bing results within an RSS aggregator for your personal, non-commercial use. Any other use of these results requires express written permission from Microsoft Corporation. By accessing this web page or using these results in any manner whatsoever, you agree to be bound by the foregoing restrictions.https://www.gi.alaska.edu/alaska-science-forum/northern-tree-habitats-0Interior 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 of those, plus jack pine, balsam fir and lodgepole pine. Since northern Canada and interior Alaska share the same grueling climate and extremes of daylength, why are the Canadian tree species absent from ...Tue, 31 Mar 2026 02:28:00 GMThttps://www.gi.alaska.edu/alaska-science-forum/more-why-tree-trunks-spiralI eventually found a tree with a spiral lightning mark and it followed the spiral grain exactly. One tree, of course, proves nothing. "But why should the tree spiral? More speculation here: Foliage tends to be thicker on the south side of the tree because of better sunlight.Wed, 01 Apr 2026 04:14:00 GMThttps://www.gi.alaska.edu/alaska-science-forum/tree-rings-and-historyA tree's age can be easily determined by counting its growth rings, as any Boy or Girl Scout knows. Annually, the tree adds new layers of wood which thicken during the growing season and thin during the winter. These annual growth rings are easily discernible (and countable) in cross-sections of the tree's trunk. In good growing years, when sunlight and rainfall are plentiful, the growth rings ...Fri, 20 Feb 2026 02:02:00 GMThttps://www.gi.alaska.edu/alaska-science-forum/feltleaf-willows-alaskas-most-abundant-treeThe most plentiful moose food in the state — and probably Alaska’s most numerous tree — is the feltleaf willow, which was once called the Alaska willow. As its name implies, the feltleaf sprouts canoe-shaped green leaves that feel fuzzy on the underside.Sat, 04 Apr 2026 01:18:00 GMThttps://www.gi.alaska.edu/alaska-science-forum/tree-line-changes-kenai-peninsulaThe gradual change in tree line is one of many that people have noticed on the Kenai Peninsula in recent years. The most obvious is the 1980s-to-1990s Spruce bark beetle invasion, during which the insects killed 30 million mature spruce trees on the Kenai and a wide swath of southern Alaska.Mon, 30 Mar 2026 10:28:00 GMThttps://www.gi.alaska.edu/alaska-science-forum/bark-beetles-spruce-treesBark beetles attack spruce trees in early summer. These brownish black beetles are common throughout Alaska and Yukon Territory where they kill trees by boring through the bark and feeding and breeding in the phloem (inner bark)--the thin layer of soft tissue directly beneath the bark. If the beetles girdle the phloem, the tree will die since the phloem is the vital path that transports food ...Sun, 29 Mar 2026 16:27:00 GMThttps://www.gi.alaska.edu/alaska-science-forum/visit-exotic-tree-plantation-alaskaThe 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 borrowed the key from a researcher with UAF’s Agricultural and Forestry Experiment Station, Woodward has invited me to join him inside the chain-link fence.Tue, 31 Mar 2026 02:49:00 GMThttps://www.gi.alaska.edu/alaska-science-forum/bark-beetles-take-connecticut-size-bite-out-alaskaKnowing that, forest managers might be able to anticipate an outbreak and plan tree harvests ahead of the beetles or try preventative measures that might work on small outbreaks, such as tree thinning, pruning, setting out hormone traps for beetles, and getting rid of piles of logs that attract beetles.Thu, 26 Mar 2026 11:30:00 GMThttps://www.gi.alaska.edu/alaska-science-forum/tamarack-not-dead-spruceIt is not possible to foretell if tamarack may some day become a commercial crop, but one thing is certain: the "spruce that dies" each fall has some unique qualities that make it a desirable tree for ornamental, subsistence and commercial uses in interior Alaska.Wed, 01 Apr 2026 19:30:00 GMThttps://www.gi.alaska.edu/alaska-science-forum/pinhole-natures-lensSunlight passing through minor apertures between tree leaves is focused like the rays in a pinhole camera (and, just as with a simple lens, the image is upside-down).Thu, 02 Apr 2026 16:01:00 GMT