In physical geography, tundra is a type of biome where the tree growth is hindered by low temperatures and short growing seasons. There are three types of tundra: Arctic tundra, alpine tundra, and Antarctic tundra. In tundra, the vegetation is composed of dwarf shrubs, sedges and grasses, mosses, and lichens. The ecotone (or ecological boundary region) between the tundra and the forest is known as the tree line or timberline. Arctic tundra occurs in the far Northern Hemisphere, north of the taiga belt. The word “tundra” usually refers only to the areas where the subsoil is permafrost, or permanently frozen soil. Climatic classification, polar antarctic alpine climate. Cold and dry vegetation. Slider dolly. Soil surface floor ground texture background. 4K UHD 3840×2160 30p.