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How is closed-canopy taiga different from lichen woodland?
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Taiga
Boreal forest, Alaska, U.S., dominated by spruce trees (Picea).
The taiga biome is organized into three distinct zones, with the closed-canopy forest and lichen woodland representing different structural and environmental conditions.1
- Closed-Canopy Forest: Located in the southernmost portion of the taiga, this zone features the highest productivity, the warmest soils, and the longest growing season within the boreal region. It is characterized by a dense forest structure where tree crowns form a continuous canopy.1
- Lichen Woodland: Situated north of the closed-canopy forest, this zone is defined as a sparse forest or woodland where tree crowns do not form a closed canopy. Unlike the closed-canopy zone, the ground cover here is significantly composed of lichen mats and tundralike vegetation.1
While lichens are present throughout the taiga—often found on tree trunks and in the canopies of older conifers—they serve as a dominant feature of the ground cover specifically within the sparse lichen woodland zone.2