1. How is the number of sea urchins affected by the number of sea otters in this community?
2. How is the number of sea otters affected by the number of sea urchins?
• Compare variations, tolerances, and adaptations in different biomes
Today’s Objective:
Can be found in the book: Pg. 74 - 83
Abiotic Factors:
Warm temps (Avg. 25° C)
Large Amounts of Moisture
High levels of Rainfall
Rich Soil
Biotic Factors:Rainforests have more biodiversity than any other biome.
Animals that can live in trees
Organisms that need a lot of moisture (frogs/fungi)
Organisms that don’t need a lot of light (under the canopy)
Deserts: areas that receive less than 25 cm of rain per year.
Most deserts get very hot during the day and get very cold at night.
Abiotic Factors:
Drastic Temp changes from day to night
Very dry
Very low levels of Rainfall
Little or no topsoil
In the Desert Biome, plants (cactus) have the ability to hold water for
later use and most animals (scorpion) are nocturnal.
Animals usually have thick shells or skin
Get water from food, or store water (plants)
Come out at night and burrow during the day
Grasslands receive more rain than the desert - enough to support grasses and bushes, but
not enough to support a lot of trees.
Abiotic Factors:
Has a rainy season and a dry season
Rich soil
Temperatures vary throughout the year
Dominated by grasses
Grazing animals
Animals that can adjust to fit season- thicker coats in winter, burrow during extreme temps
Abiotic Factors:
Temperatures vary greatly- very cold winter, hot summer
Annual rainfall (50-300cm)
Soil- rich top layer, deep clay layer
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.
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 animals
TundraAbiotic Factors:
Little annual rainfall
Dry, very cold
Soil- underneath thin topsoil- frozen ground, no nutrients in the soil
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
Abiotic Factors:
A little warmer, and wetter than tundra
Long severe winter, short mild summer
Soil- poor in minerals and acidic
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