Sunday, October 9, 2011

Tundra Plants

Arctic tundra plantsThe arctic tundra around the Arctic and extends more to the pine forests of the taiga biome. The average temperature is about -34°C, with summer, a bit "less negative, at about 3-12°C. The permafrost, the permafrost is a sub-material and fine gravel. The growing season is only 50-60 day year . no plants to contend with deep roots in these extreme climatic conditions. This is the source of water for the vegetation available to help when the water saturation in the upper marshes and ponds that form. In addition, these plants are resistant cold. Surprisingly, the persistent snow cover protects plants against the cold winds of the tundra. These plants photosynthesis at low temperature, depending on the light intensity. Plant breeding in the Arctic is mostly by budding and flowering of the division or not.
A good example of a dwarf plant Tundra is the Arctic willow, feeding close to the ground by developing shallow roots. It is also known to the steel plant. These plants are also known as a cushion of plants, which at their growth low density clumps have a cushion. Their formation explains capture warm air in them to protect them from cold air. An example of this plant cushion is purple saxifrage. It is remarkable with purple star shaped flowers during the snow melt. The stem of this plant with small leaves, the tiny hairs that trap heat treated in the factory.
Then there are mosses and lichens, which grow in abundance in the arctic tundra. Lichen is a plant that is a combination of algae and fungi. These plants are different and there are more and more like a flaky crust on tree trunks and rocks. Some even seem bushy plants outbreak of tree trunks, while others hang from the trees. A good example is the Arctic reindeer. This lichen can grow without soil. They grow on rocks and are also a source of food for other animals such as caribou, tundra. Some mammals also this plant to fill in their burrows and nests. Moreover, these foams flowerless plants the little child rhizoids, because the roots) moisture. They grow in a region that has enough moisture and less land. You can also grow on the rocks.