(par 4.2.3.2.1) Alpine Tundra Ecosystem
https://wildtracks.wordpress.com/world-ecosystems/tundra-ecosystems/alpine-tundra-ecosystem/ Alpine tundra is located around the world on high alitutude mountains above the tree line. These windswept areas are characterised by an abundance of barren rocks or thin soils. Frequent drops in temperature to freezing followed by thaws cause the rocks to break up. In the well drained soil, the growing season is only 180 […]
(par 4.2.3.2.1) Tundra (taken from World Biomes)
http://www.blueplanetbiomes.org/world_biomes.htm What is a Biome? A biome is a large geographical area of distinctive plant and animal groups, which are adapted to that particular environment. The climate and geography of a region determines what type of biome can exist in that region. Major biomes include deserts, forests, grasslands, tundra, and several types of aquatic environments. […]