In the polar biomes, increasing depths of the permafrost and increasing infestations of bark beetles are the result of:
increased logging of the region. forest fires. construction of the Alaska pipeline. global climate warming.
In the polar biomes, increasing depths of the permafrost and increasing infestations of bark beetles are primarily the result of global climate warming. As temperatures rise due to climate change, permafrost thaws, and warmer conditions can lead to increased bark beetle populations, which thrive in milder climates.