- Slides: 36
Biomes of the World
What is a biome? A BIOME is a community of plants and animals adapted to a range of temperature and moisture
• A BIOME ……… is a LIFE - ZONE
How are biomes formed? Climate. ( Temperatures and Precipitation ) Climate is determined by : * Latitude * Closeness to large body of water * Elevation Typically, a climb of 100 feet in elevation is equivalent to traveling 600 miles northward.
How many biomes are there?
How many biomes are there? • • • Tropical Rainforest Tropical Savanna Desert Chaparral Grassland Temperate Deciduous Forest • Temperate Boreal Forest • Tundra
Tropical Rainforest • Near the equator. • 200 cm or more of rain per yr. ( that much rain would fill a rain guage as tall as Mr. Mork ! ) • Temps usually 20 o. C to 25 o. C all year. = year round photosynthesis! Lots of food • Over half of the world’s animal species may be found here.
Tropical Savanna • Grasslands with some trees • wet season and dry season • Hot temps • 50 cm to 127 cm rain / yr • More species of grazing mammals than any other biome
Desert • Most deserts = 25 o to 40 o latitude • Less than 25 cm rain per year • 20 o. C to 25 o. C is usual. • As high as 38 o. C as low as – 15 o. C
Chaparral • Found between 32 o and 40 o latitude on the west coast of continents • Receives between 35 and 70 cm of rain, usually in the winter • Extremely resistant to drought and weather events
Grassland * Too Dry For Trees • 50 to 90 cm rainfall per year • Summer temps up to 38 o. C, Winter temps as low as – 40 o. C
Prairie… Not just grass
Temperate Deciduous Forest • 4 seasons. • Trees lose leaves in the winter • Temps – 30 o. C to 30 o. C • 75 to 150 cm of precipitation
Temperate Boreal Forest Also called the Taiga Or the Northern Coniferous Forest • • 45 o to 60 o North latitude Cold climate. Very few reptiles Snow is primary form of precipitation (40 – 100 cm annually)
TAIGA … Northern hemisphere only .
TAIGA …. . Tree branches adapted to carry a heavy snow load without breaking.
Red squirrel = a primary consumer in the Northern coniferous forest ( Taiga )
Tundra • Means treeless or marshy plain • Permafrost – permanently frozen soil severely limits plant growth • Winter temperatures average – 34 o. C while summer temperatures usually average below 10 o. C • Low precipitation (15– 25 cm per year) but ground is usually wet because of low evaporation
Tundra plants and lichens… low to the ground = an adaptation
Caribou = primary consumers in the tundra biome
Arctic Fox …. secondary consumer
Credits • Text: – http: //www. physicalgeography. net/fundamentals/9 k. html – http: //www. ucmp. berkeley. edu/glossary/gloss 5/biome/index. html • Pictures: – http: //www. worldbiomes. com/ – http: //www. ucmp. berkeley. edu/glossary/gloss 5/biome/index. html – http: //www. blueplanetbiomes. org/ • Power. Point: – Arizona Game and Fish Department, 2005