Thursday, February 11, 2010

Artic and Alphine Tundra( Chen Jei Min)

Artic Tundra-
Arctic tundra occurs in the far Northern Hemisphere, north of the taiga belt.
Teperature of Artic Tunda-The Arctic tundra is a vast area of stark landscape and is frozen for much of the year. The soil there is frozen from 25–90 cm (9.8–35.4 inches) down, and it is impossible for trees to grow. Instead, bare and sometimes rocky land can only support low growing plants such as moss, heath (Ericaceae varieties such as crowberry and black bearberry), and lichen. There are two main seasons, winter and summer, in the polar tundra areas. During the winter it is very cold and dark, with the average temperature around −28 °C (−18.4 °F), sometimes dipping as low as −50 °C (−58.0 °F). - (Cold season)
( Warm Season) During the summer, temperatures rise somewhat, and the top layer of the permafrost melts, leaving the ground very soggy. The tundra is covered in marshes, lakes, bogs and streams during the warm months. Generally daytime temperatures during the summer rise to about 12 °C (54 °F) but can often drop to 3 °C (37 °F) or even below freezing.
Animals-1,700 species of vascular plants and only 48 land mammals can be found, although thousands of insects and birds migrate there each year for the marshes. There are also a few fish species such as the flatfish. There are few species with large populations. Notable animals in the Arctic tundra include caribou (reindeer), musk ox, arctic hare, arctic fox, snowy owl, lemmings, and polar bear. Plants- Instead, bare and sometimes rocky land can only support low growing plants such as moss, heath (Ericaceae varieties such as crowberry and black bearberry), and lichen
Alphine Tundra- is an ecozone that does not contain trees because it has high altitude
Soils- alpine soils are generally better drained than arctic soils.
Temperature of Alphine Tundra-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. Animals- There are only about 200 species of Alpine plants.

1 comment:

  1. Jie Min, you spelt 'Arctic' as 'Artic'! Be careful next time! I should say that to myself too since I also had a spelling mistake! Check out mine if you don't believe me. :)


    from,
    Adrian

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