QUESTIONS AND TASKS. 1. What is altitudinal zonation? 2. What are the main reasons for the different manifestations of altitudinal zonation? 3. How does altitudinal zonation manifest in the mountains of the Caucasus? 4. The boundaries of altitudinal belts in mountains are not constant and can shift due to climate change. For example, in the Polar Urals, scientists have recorded the advancement of tree and shrub vegetation up the slopes in recent decades. As a result of climatic changes, the upper boundary of larch sparse forests has risen by 50-80 m. The advancement of shrubs up the slope by 50 m or more is also noted in the Khibiny. On which peninsula are the Khibiny Mountains located? Which altitudinal belt in the Polar Urals is shrinking as a result of the advancement of tree vegetation up the slopes? Explain what climatic changes in recent decades have led to the shift in the boundaries of altitudinal belts.

Analysis of the Questions:

• Question 1: Asks for a definition of altitudinal zonation.
• Question 2: Inquires about the primary factors causing variations in altitudinal zonation.
• Question 3: Seeks specific examples of how altitudinal zonation appears in the Caucasus mountains.
• Question 4: This is a multi-part question that:
  • States that altitudinal belt boundaries are dynamic and influenced by climate change.
  • Provides an example from the Polar Urals (larch sparse forests rising 50-80m) and Khibiny (shrubs rising 50m+).
  • Asks to identify the peninsula where the Khibiny Mountains are located.
  • Asks which altitudinal belt is shrinking in the Polar Urals due to advancing vegetation.
  • Requires an explanation of recent climatic changes causing these shifts.

Information Extraction:

• Khibiny Mountains: Located on the Kola Peninsula.
• Shrinking Altitudinal Belt (Polar Urals): Likely the forest-tundra or mountain-tundra zone is being compressed or pushed higher due to the upward movement of the tree line.
• Climatic Changes: Global warming, leading to increased temperatures, is the primary driver for the observed shifts in vegetation zones.