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Picea glauca (Moench) Voss., the White Spruce, [4] is a species of spruce native to the northern temperate and boreal forests in Canada and United States, North America.. Picea glauca is native from central Alaska all through the east, across western and southern/central Canada to the Avalon Peninsula in Newfoundland, Quebec, Ontario and south to Montana, North Dakota, Minnesota, Wisconsin ...
Climate change is a threat to taiga, [5] and how the carbon dioxide absorbed or emitted [6] should be treated by carbon accounting is controversial. [7] White spruce taiga in the Alaska Range, Alaska, United States
White spruce is the predominant tree species in the Boreal White and Black Spruce (BWBS), except in the Fort Nelson area where the poorly drained lowlands are dominated by black spruce. Engelmann spruce is absent, though some white × Engelmann hybrids may occur at southern margins of the zone bordering the SBS zone.
The taiga forests are mainly white spruce (Picea glauca), alaskan birch (Betula neoalaskana), balsam poplar (Populus balsamifera), and quaking aspen (Populus tremuloides) in the warmer drier areas, and black spruce (Picea mariana), and american larch (Larix laricina) where it is marshier but the ecoregion also contains scrubby areas of dwarf birch (Betula nana) and riverbanks of willows ...
He noted that according to the Intergovernmental Panel on Climate Change, even in a world that is, on average, 2.7 degrees warmer than its late 19th-century average temperature, global snowfall ...
White spruce, black spruce and tamarack are most prevalent in the four northern eco-zones of the Taiga and Hudson Plains, while spruce, balsam fir, jack pine, white birch and trembling aspen are most common in the lower boreal regions. Large populations of trembling aspen and willow are found in the southernmost parts of the Boreal Plains. [12]
The dominant trees of the taiga are black spruce (Picea mariana) and tamarack (Larix laricina), mixed with smaller numbers of white spruce (Picea glauca), dwarf birches, willows, laurels, and rhododendrons. The boglands are a habitat of sedges and sphagnum moss.
Mast-year effects on the density of white spruce are long-lasting; 40 years after fire, mast-year fires still had 2.5 times more spruce regeneration than non-mast-year fires. [ 18 ] The interaction of mast seeding, climate, and tree growth creates notable effects in tree ring chronologies , and in many tree species reduced growth has been ...