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Biomes of the World

Discover the largest geographic biotic units - biomes, major plant and animal communities with similar life forms. Learn about the Tropical Rainforest, Desert, Grassland, Temperate Deciduous Forest, Taiga Forest, and Tundra. Understand the distinct characteristics, climates, and biodiversity of each biome.

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Biomes of the World

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  1. Biomes of the World

  2. What is a biome? A BIOME is the largest geographic biotic unit, a major community of plants and animals with similar life forms and environmental conditions.

  3. Tropical Rainforest Desert Grassland Temperate Deciduous Forest Tundra How many biomes are there? Although there is some disagreement among scientists on how to divide up the Earth’s biomes, most can agree on the following six of the eight major biomes:

  4. Tropical Rainforest • Typically found near the equator • Receives more than 200 cm to 450cm of rain annually • Temperatures typically fall between 20oC and 28oC for the entire year • As many as 50% of all the world’s animal species may be found here

  5. Desert • Typically found between 25o and 40o latitude • Receives 0- 25 cm of rain each year • Temperatures typically range between 1oC and 50oC but some dessert can be extreme (-15 oC)

  6. Grassland • Because of the dry climate, trees are found only near water sources such as streams • Usually receives between 38 and 76 cm of rainfall each year • Summer temperatures can reach up to 26oC, and winter temperatures can fall to –6oC

  7. Temperate Deciduous Forest • Moderate climate • Most trees will lose their leaves in the winter • Temperatures range between 0oC and 28oC • Averages from 76 to 250 cm of precipitation • Well developed understory

  8. Taiga Forest • Also known as Boreal Forest • Typically found between 45o and 60o North latitude • Avg. Temperature Range oC • -10oC -15oC • Very few reptiles • Snow is primary form of precipitation (40 – 61cm annually)

  9. Tundra • Means treeless or marshy plain • Characterized by permafrost – permanently frozen soil starting as high as a few centimeters below the surface – which severely limits plant growth • Winter temperatures average : -27oC while summer temperatures usually average below 5oC • Low precipitation (0–25 cm per year) but ground is usually wet because of low evaporation

  10. Credits • Text: • http://www.physicalgeography.net/fundamentals/9k.html • http://www.ucmp.berkeley.edu/glossary/gloss5/biome/index.html • Pictures: • http://www.worldbiomes.com/ • http://www.ucmp.berkeley.edu/glossary/gloss5/biome/index.html • http://www.blueplanetbiomes.org/ • PowerPoint: • Arizona Game and Fish Department, 2005

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