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The taiga ecoregion includes much of interior Alaska as well as the Yukon forested area, and extends on the west from the Bering Sea to the Richardson Mountains in on the east, with the Brooks Range on the north and the Alaska Range on the south end.
The plant life here is varied for Alaska, composted of a mixture of conifers and other trees, shrubs, and herbs. The dominant trees in this region are black spruce (Picea mariana), white spruce (Picea glauca), lutz spruce (Picea x lutzii), quaking aspen (Populus tremuloides), balsam poplar (Populus balsamifera), black cottonwood (Populus trichocarpa) and paper birch (Betula papyrifera).
This ecoregion is a mountainous area of ridges up to 1200m between peaks up to 2500m, located on the southern, Pacific Ocean side of the Alaska Peninsula from Cook Inlet west through the Kodiak Archipelago to Unimak Island at the beginning of the Aleutian Islands chain, while the area around Cook Inlet at the head of the peninsula is the neighboring Cook Inlet taiga ecoregion.
This ecoregion consists of a large flat plateau in southeastern Alaska at 400-900m above sea level, surrounded by the high mountains and dotted with many lakes and marshes. The area is almost entirely within the Wrangell – St. Elias National Park and Preserve while the Denali Highway crosses the ecoregion in the northwest.
The "taiga", as it is called there, of Eurasia occupies a similar range on those continents. Throughout the Northern Hemisphere, the boreal forest covers 2.3 million square miles, a larger area than the remaining Brazilian Amazon rainforest .
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 ...
Boreal forest near Shovel Point in Tettegouche State Park, along the northern shore of Lake Superior in Minnesota.. A boreal ecosystem is an ecosystem with a subarctic climate located in the Northern Hemisphere, approximately between 50° and 70°N latitude.
Alaska is the most biodiverse state with 15 ecoregions across three biomes in the same realm. California comes in a close second with 13 ecoregions across four biomes in the same realm. By contrast, Rhode Island is the least biodiverse with just one ecoregion—the Northeastern coastal forests —encompassing the entire state.