Pine grove near Yakutat is farthest north - Geophysical Institute
2021年8月12日 · Pine grove near Yakutat is farthest north. YAKUTAT — “There they are,” Ben Gaglioti said, after a short hike off a gravel road leading away from this small fishing town. Gaglioti walked in rubber boots on a green, squishy carpet of muskeg — a wild garden of water-loving plants growing on acidic soil that has for centuries prevented the ...
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 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.
Witches' Broom - Geophysical Institute
2024年10月10日 · Witches' Broom. 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 seen on black and white spruce trees. From late fall through the winter, the brooms are dark brown or "dead"looking and are often mistaken for birds' and squirrels' nests ...
More on Why Tree Trunks Spiral - Geophysical Institute
2024年10月10日 · Prevailing winds, in most of the tree-growing northern hemisphere, are from the west. Combine these factors, and the westerly wind pushing on the thicker south side of the tree, year after year, causes an asymmetrical wind loading which slowly twists the tree around in the observed direction.
Mummified forest tells tale of a changing north
2011年1月6日 · The mummy trees of northern Ellesmere Island include a trunk of a pine tree four feet long and six inches in diameter. Each of the trees was at least 75 years old when it died. The ancient forest holds samples of the last real trees in the area before it became too cold and dry to support large plants, Barker said.
Burls - Geophysical Institute
2024年10月10日 · Burls. Burls, spherical woody growths on the trunks of spruce, birch and other trees, are commonly found throughout wooded parts of Alaska. Many are removed from trees and used for furniture making and for decorative roof or mailbox supports or just to set out in the yard as curiosities. A burl begins life as a gall--a tumor on plant tissue ...
Nature's Diaries: The Bristlecone Pine and Glacier Ice
2024年9月12日 · Bristlecone pines, found only in the White Mountains of California and Nevada, are among the oldest living things on earth.
A green system of carbon-dioxide removal - Geophysical Institute
2024年10月10日 · Plants suck up six molecules of carbon dioxide and combine it with six molecules of water and a spark of energy to produce one molecule of sugar. The plant uses the sugar to make, among other things, cellulose, the building material of stems and tree trunks. A byproduct of the photosynthesis reaction is six molecules of oxygen.
The largest black spruce in Alaska | Geophysical Institute
2010年8月16日 · The black spruce on the UAF campus is taller than the state record western paper birch, a 67-footer near Haines, and Alaska’s tallest balsam poplar, a 60-foot tree on the Kuskokwim River. Alaska’s current champion white spruce will soon give up its title, Malone said. The 112-foot tree in the floodplain of the Tok River is dying from an ...
Red Squirrels Show Signs of Adapting to Climate Change
2024年10月10日 · Canadian scientists have found that red squirrels in the Yukon give birth 18 days earlier on average than their great-grandmothers, perhaps in response to warmer springtime temperatures. The researchers say it's the first time a mammal has shown a genetic response to climate change. The red squirrel is familiar to anyone who has stepped into ...
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