Britannica Sources used in this answer

Why do some taiga regions have grasslands mixed with forests?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Boreal forest in Alaska — Taiga Boreal forest, Alaska, U.S., dominated by spruce trees (*Picea*).

Some regions of the taiga feature a mix of forests and grasslands primarily due to climatic conditions.

In the arid centers of both North America and Eurasia, the closed-canopy boreal forest is often bordered to the south by a forest parkland consisting of trees and grassland. These areas are typically semiarid, receiving 30 cm (12 inches) or less of annual precipitation. This moisture limitation occurs because these regions are located a significant distance from unfrozen oceans or are situated on the leeward side of mountain ranges, which shelter them from moisture-bearing winds.1

Additionally, in some parts of the taiga, forest fires play a role in shaping the landscape. Intense heating during the summer can lead to convective storms that produce lightning, which may ignite fires that remove the forest canopy and allow for the presence of other vegetation types.1