What does permafrost do to the the soil? (in the tundra)

The permafrost keeps melted water near the surface, where plants need it. However, this balance is fragile. If the plant cover is damaged, the permafrost can thaw. Thawing permafrost can make the ground collapse and disturb and deepen the active layer.

Explanation:

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emerald ash borer

the emerald ash borer is a green buprestid or jewel beetle native to north-eastern asia that feeds on ash species. females lay eggs in bark crevices on ash trees, and larvae feed underneath the bark of ash trees to emerge as adults in one to two years. hope this !