1. Biomes are a group of ecosystems with similar abiotic and biotic factors (example: hot/dry desert in Nevada and North Africa)

2. Rain Forests found near the equator

3. Abiotic Factors:
Warm temps (Avg. 25° C, 77° F)
Large Amounts of Moisture (Humidity Avg. 88%)
High levels of Rainfall (more than 100 inches per year: 8 feet)
Very Poor Soil (nutrients washed away/lots of plants)

4. Rainforests have more biodiversity than any other biome.
Biotic Factors:
Rainforests have more biodiversity than any other biome.
Animals that can live in trees (tails, fly, grip)
Organisms that need a lot of moisture (frogs/fungi)
Organisms that don’t need a lot of light (under the canopy)

5. Rainforests make 40% of the Earth’s oxygen.
Biotic Factors:
Rainforests make 40% of the Earth’s oxygen.
Not a lot of light under canopy/ need to absorb light/ lots of vines
300 different types of species of trees every 2 acres, 70% of the plants are trees

6. Desert Biomes

7. Desert Biomes

8. Drastic Temp changes from day to night
Abiotic Factors:
Drastic Temp changes from day to night
(49°C, 120°F to °C, -1°F)
Windy
Very dry (less than 9 in. of rain a year, less than one foot)
Sand/ Little or no topsoil

9. In the Desert Biome, plants (cactus) have the ability to hold water for later use and most animals (scorpion) are nocturnal.

10. Animals usually have thick shells or skin
Get water from food, or store water (plants)
Come out at night and burrow during the day

11. Grassland

12. Grassland

13. Abiotic Factors:
Temperatures vary throughout the year, warm summer, cold winter
Windy
Has a rainy season and a dry season (10 to 30 in. a year, not enough rain to naturally support trees, but plenty for grass and shrubs)
Nutrient-rich soil

14. Dominated by grasses
Grazing animals
Plants and Animals that can adjust to fit season- ex. thicker coats in winter, burrow during extreme temps

15. Deciduous Forest

16. Abiotic Factors:
Temperatures vary greatly- very cold winter, hot summer
Four distinct seasons
Annual rainfall (50-300cm, in.)
Soil- rich top layer, deep clay layer

17. Deciduous Forest
The weather in this area changes with the seasons. It becomes very cold in the winter and hot in the summer. There is enough rainfall to support large trees.

18. Trees in this biome drop their leaves in the fall/winter and new ones sprout each spring.

19. Nesting birds
Diverse animals
Animals that can adjust to fit season- thicker coats in winter, hibernating during extreme temps
A lot of brown and green organisms

20. Taiga: also known as northern coniferous

21. Abiotic Factors:
Long, Very cold winter season, below freezing for six months out of the year.
Cold season, Rainy Season
Snow is the main precipitation
Soil- poor in minerals and acidic

22. Coniferous trees- aspen, birch
Large animals
Animals with thick fur and that hibernate in severe conditions

23. Tundra

24. Tundra Abiotic Factors: Very cold (avg. -70°) very windy
Dry, Little annual rainfall
Soil- underneath thin topsoil- frozen ground, no nutrients in the soil

25. Treeless land
Limited organisms due to low vegetation and extreme cold
Only shallow-rooted grass and small plants
Migration animals, very insulated
Lot of white animals