Related to demarcation: demarcation line, Demarcation point, Demarcation problem See: boundary, definition, differentiation, discrimination, limitation, outline, periphery, restriction, severance Want to thank TFD for its existence?
Alpine plants are plants that grow in an alpine climate, which occurs at high elevation and above the tree line. Alpine plants grow together as a plant community in alpine tundra. Alpine plants are not a single taxon. Rather, many different plant species live in the alpine environment. These include perennial grasses, sedges, forbs, cushion plants, mosses, and lichens. Alpine plants must adapt to the harsh conditions of the alpine environment, which include low temperatures, dryness, ultraviolet radiation, and a short growing season. Some alpine plants serve as medicinal plants.
In alpine tundra, where permafrost is absent or. patchy, the shallow bedrock or layers of rock near the. soilâs surface block water drainage and create some of. the same landscape features that permafrost does. TUNDRA WETLANDS. Although precipitation in arctic tundra is similar to. that of deserts (5 inches â12.7 centimeters â or less), the water has nowhere to go once it hits the. permafrost. The soil above the permafrost or bedrock, called the active layer , becomes saturated like a wet. sponge. The results are (1) wetlands typical of much. wetter environments and (2) freeze-thaw landforms. of tundra topography. The tundra contains ponds, lakes, bogs, marshes, and. river and stream corridor wetlands.