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alaska.edu
https://www.gi.alaska.edu › alaska-science-forum › cottonwood-and-bals…
Cottonwood and Balsam Poplar | Geophysical Institute
2025年1月9日 · While poplar may grow to 100 feet high and two feet across, cottonwood can reach to 125 feet and be much larger in diameter. Cottonwoods three feet in diameter at …
alaska.edu
https://www.gi.alaska.edu › alaska-science-forum
Northern Tree Habitats - Geophysical Institute
2025年1月9日 · They examined the present range of lodgepole pine and decided that the tree could survive in interior Alaska if given a chance. Lodgepole pine grows from southern …
alaska.edu
https://www.gi.alaska.edu › alaska-science-forum › burls
Burls - Geophysical Institute
2024年12月19日 · Since the hardness of the wood is related to the rate of growth, the wood inside a rapidly growing burl is softer than the wood elsewhere in the tree. Nevertheless, it is hard …
alaska.edu
https://www.gi.alaska.edu › alaska-science-forum › tree-line-changes-ke…
Tree line changes on the Kenai Peninsula | Geophysical Institute
2008年2月6日 · The 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 …
alaska.edu
https://www.gi.alaska.edu › alaska-science-forum › majesty-and-myster…
The majesty and mystery of Alaska yellow cedar
2021年7月23日 · Probably because of chemical compounds within the tree like nootkatin that emit the pleasant odor and tint the wood yellow, Alaska yellow cedar endures like no other tree in …
alaska.edu
https://www.gi.alaska.edu › alaska-science-forum › burls-and-human-ca…
Burls and Human Cancer - Geophysical Institute
2025年1月9日 · Photograph of a section cut from a tree with 5 burls that simultaneously grew at the same level on the tree. Annual growth rings can be followed around the tree trunk at center …
alaska.edu
https://www.gi.alaska.edu › alaska-science-forum › witches-broom
Witches' Broom - Geophysical Institute
2025年1月9日 · In interior Alaska and some parts of Canada, witches' broom (an abnormal outgrowth of branches of the tree resembling the sweeping end of a broom), is commonly …
alaska.edu
https://www.gi.alaska.edu › alaska-science-forum › visit-exotic-tree-plant…
Visit to an exotic tree plantation in Alaska
2021年6月18日 · 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 …
alaska.edu
https://www.gi.alaska.edu › alaska-science-forum
The largest black spruce in Alaska | Geophysical Institute
2010年8月16日 · The tree leans uphill, and its trunk is 45 inches around. When I hugged it, I could barely clasp my hands together. The largest black spruce in Alaska is a lucky tree, because its …
alaska.edu
https://www.gi.alaska.edu › alaska-science-forum › trees-cold-climate
Trees for a Cold Climate - Geophysical Institute
1993年4月1日 · Back on the ground, I did a little research on why so few tree types grow naturally in the neighborhood. Winter's extreme cold easily eliminates some tree species hardy …
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