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The Tundra

My biome PowerPoint project for Biology--3rd Hour

Sakila Islam

on 11 May 2012

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Transcript of The Tundra

Tundra The tundra is a pretty much treeless plain. Due to permafrost covering most of the land, the only growth there are mosses, lichens, and shrubs. It is somewhat rocky. The tundra is the coldest biome in the world. It is characterized by its lack of trees and permanently frozen soil--although permafrost does not cover all of the soil and you may be able to find a few scattered trees. The tundra is found in the most extreme locations on the Earth--either the utmost south or north or the places with the highest elevation.
There are three types of tundra: the arctic and antarctic tundra, which depend on location, and the alpine tundra, which depends on elevation. World Distribution Geography The tundra is found in the northernmost and southernmost latitudes. The elevation at both is generally high. Tundras that are created due to high elevation may be anywhere in the world. Climate The tundra is, again, the coldest biome in the world. There are two major seasons in the Arctic tundra: winter and summer. During the winter, the temperature is typically -28 degrees Celsius but can drop down to -50 degrees Celsius. During the summer, the temperature is usually 12 degrees Celsius but can go down to 3 degrees Celsius.
The tundra is actually quite desert-like, with only 6-10 inches of snow per year. However, the amount of evaporation is low.
Alpine tundras are characterized by places that usually have temperatures lower than 10 degrees Celsius yearlong. Not many plants are able to adapt to the harsh environment of the tundra. Thus, the lack of trees. Mostly moss, grass, lichen, sedge, and shrubs grow in the tundra. There are also few animals that can adapt to the tundra. These animals have thick coats to protect them from the cold. The polar bear is the top predator in the arctic tundra. Therefore, it is crucial to the population of its prey. It eats walruses, fish, and seals. Natural resources, such as oil and uranium have been discovered in the tundra, but due to its harsh environment, not many countries have endeavored to harvest the resources. One of the major human impacts on the arctic and antarctic tundra is global warming. The melting of the polar ice caps is due to too much carbon dioxide in the atmosphere. This extra carbon dioxide comes from human activities.
Some people hunt and trap deer in the tundra as well. By Sakila Islam
3rd Hour Biology
Biome Project Human Impacts How Plants Adapt How Animals Adapt Resources The Habitat and Niche of the Polar Bear Polar bears live near areas where ice meets water for easy access to food. Bibliography http://www.ucmp.berkeley.edu/glossary/gloss5/biome/tundra.html https://php.radford.edu/~swoodwar/biomes/?page_id=89 http://en.wikipedia.org/wiki/Polar_bear#Habitat http://en.wikipedia.org/wiki/Tundra http://www.google.com/webhp?hl=en&tab=ww END
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