Regional climates:
For example~ a state or country with
a ocean borderign it is involved in a
cold ocean current that flows north
to south, which makes summers
cooler.
4.4 BIOMES
Moist air will travel and expand to
make clouds.
Rain or snow will drop from the
clouds to change the weather
pattern
BIOMES
• Groups of regional climate communities
described in terms of the abiotic factors like:
• Climate
• Soil type
• And biotic factors like:
• Plants
• Animals
CHARACTERIZED BY
• The adaptations that allow them to survive and reproduce.
TROPICAL RAIN FOREST
A tropical rain forest is home to more species than any other biome
As you would probably guess from name they do get a lot of rain
At least 2 meters a year
CANOPY
Dense layer formed by tall leafy trees clustered together everywhere
Range from 50 to 80 meters tall above forest floor
UNDERSTORY
Smaller trees and vines under the canopy form this layer
2 ABIOTIC FACTORS AND 2 BIOTIC FACTORS
2 abiotic would be that its hot and wet year round and there is nutrient poor soil
2 biotic factors are the plant and animal life
4.4 Biomes
(Tropical Dry Forests)
Tropical dry foresT’s
• Tropical dry forests grow in areas with rainy
seasons alternate with dry seasons. In some
cases after a period of rain is instantly
followed by prolonged periods of drought.
Abiotic factors
Tropical dry forests are warm all year round,
and have rich soils that are subject to erosion.
Biotic
Factors
Plant Life: plants
have adapted to
survive the dry
seasons by loss of
leaves.
Plant Life: Some
plants also have an
extra thick waxy
layer over their
leaves to lower water
loss and to store
water in their tissue.
Biotic factors (Continued)
• Animal Life: to survive
the dry seasons animals
can reduce their needs for
water by entering long
periods of inactivity
called estivation. Other
animals including many
birds and primates move
to the areas where water
is available for them
during a dry season.
•
•
What is a plant that sheds its leaves during a
specific season?
What are the two biotic factors of tropical dry
forests?
ANSWER 1: DECIDUOUS
ANSWER 2: PLANT LIFE, ANIMAL LIFE
4.4 Biomes
Kirsten Barnes
Tropical Grassland/ Savanna
•
•
•
•
More rainfall than deserts but less than tropical dry forests
Grassy area usually with trees and shrubs
Frequent fires
Action of larger animals sometimes prevents area from
turning dry
• IE: rhinoceroses and elephants
Abiotic and Biotic Factors
• Abiotic
• Seasonal rainfall
• Fires set by lightning
• Biotic
• Plant life (adaptations)
• Animal life (migration)
Desert
• Less than 25 centimeters of rain annually
• Deserts undergo extreme daily temperature changes
• 100⁰ F during the day to under 30⁰ F at night
Abiotic and Biotic Factors
• Abiotic
• Low rainfall
• Soil rich in minerals but
low in organic material
• Biotic
• Plant life (cacti)
• Animal life (avoid heat, get
water)
Section 4.4
#’s 57-60


Grasslands are areas where the vegetation is
dominated by grasses.
Temperatures don’t get too hot or too cold

Abiotic factors- non-living tings that shape
an ecosystem.
◦ Examples- warm to hot summers; cold winters;
moderate sea soil precipitation, fertile soils;
occasional fires.


Biotic factors- living things that shape an
ecosystem.
Examples- grasses and birds.

Abiotic factors- non-living things that shape
an ecosystem.
◦ Examples- hot bry summers; cool moist winters;
thin, nutrient- poor soils; periodic fires.


Biotic factors- living things that shape an
ecosystem.
Examples- plants and white-tailed deer.
4.4
Temperature forests
Clayton welch
Conifers

Conifers produce seed
bearing cones.
 They have leaves
shaped like needles.
 Waxy substance
reduces water loss.
Soils are rich in
humus, formed from
decaying leaves
and other organic
matter.
Abiotic
factors

Cold to moderate
winters.
 Warm summers
 Year round
precipitation
 Fertile soils
Biotic
factors
Plant life- Deciduous trees.
Animal life- Animals cope
with changing weather
others migrate to warmer
climates.
Animals that do not
migrate may use
camouflage to escape
predators in the winter
when bare trees leave
them exposed
FIN
By: Derrick Branas 
Jaylin Clossen
ABIOTIC
BIOTIC

Long cold winters


High humidity

Plants: conical shape sheds
Animal: migrate to warmer
area
 Permafrost's
border a tundra and are cold
all year round.
 Typical animals
• Marine animals
• Insects
• Mites
 Mountain
ranges exist on all continents
and in many biomes.
• Conditions vary with elavation
• Soil types change
• Organisms change