Alpine biomes
are found in the mountain regions all around the world. They are usually
at an altitude of about 10,000 feet or more. The Alpine biome lies just
below the snow line of a mountain. As you go up a mountain, you will
travel through many biomes. In the North American Rocky Mountains you
begin in a desert biome. As you climb you go through a deciduous forest
biome, grassland biome, steppe biome, and taiga biome before you reach
the cold Alpine biome.
In the summer average temperatures range from 10 to
15° C . In the winter the temperatures are below freezing. The winter
season can last from October to May. The summer season may last from
June to September. The temperatures in the Alpine biome can also change
from warm to freezing in one day.
Because the severe climate of the Alpine biome, plants
and animals have developed adaptations to those conditions. There are
only about 200 species of Alpine plants. At high altitudes there is
very little CO2, which plants need to carry on photosynthesis. Because
of the cold and wind, most plants are small perennial groundcover plants
which grow and reproduce slowly. They protect themselves from the cold
and wind by hugging the ground. Taller plants or trees would soon get
blown over and freeze. When plants die they don't decompose very quickly
because of the cold. This makes for poor soil conditions. Most Alpine
plants can grow in sandy and rocky soil. Plants have also adapted to
the dry conditions of the Alpine biome. Plant books and catalogs warn
you about over watering Alpine plants.

Pygmy Bitterroot

Mountain Goat

Alpine Tundra
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