The higher you get, the more difficult the living conditions become, and even beyond 3000m practically impossible:

• drop in temperature: when you go up 100m, the temperature drops by about 1 ° C. So when it’s 20 ° C in Chamonix, it’s 15 ° in Merlet, 2 ° in the Aiguille du Midi and … 12 ° in Mont Blanc!
• increased solar radiation and wind, which promotes dehydration
• increase in quantity and duration of snow, which shortens the vegetative period in plants or the rearing period of young animals
• decrease in soil thickness and humus

Animals and plants have had to adapt to these rigorous conditions … thanks to their different coats, to a behavior “with the saving of energy”, to the hibernation for some.
The plants have found the solution: it is dwarfism. The higher you climb, the smaller they are, the more colorful and the stronger. And yes, because we must hurry to grow, bloom, attract insects to pollinate … Indeed, at 2000m, they have only 5 months to settle all that!