Transcript Rainforests have more biodiversity than any other biome.

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?
Today’s Objective:
• Compare variations, tolerances, and adaptations in
different biomes
Can be found in the book:
Pg. 74 - 83
Review:
Biomes are a group of ecosystems with
similar climates and organisms.
Rain Forests
found near the equator
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)
Desert Biomes
Desert Biomes
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
Grassland
Grassland
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
Deciduous
Forest
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.
Trees in this biome
drop their leaves in
the fall and new ones
sprout each spring.
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
Tundra
Tundra
Abiotic 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
Taiga:
also known as northern coniferous
Abiotic Factors:
A little warmer, and wetter than tundra
Long severe winter, short mild summer
Soil- poor in minerals and acidic
Coniferous trees- aspen, birch
Large animals
Animals with thick fur and that
hibernate in severe conditions