Download Name: Population Changes and Ecosystems PRICE POPULATION

Name:________________________
Population Changes and Ecosystems
PRICE
POPULATION DENSITY
 Number of____________ of the same _________ living in a given area
What affects population density?
 _______________ between organisms
 Movement _________ and out of the area
 Resources
 _________________
CARRYING CAPACITY
 The ______________ population that an environment can support over a _________ period of time.
 The carrying capacity is __________________ for different species.
 When can the carrying capacity change?
When _______________ in the environment change
EXAMPLE:
A change in the ______________ of deer may change the carrying capacity for _______________ that prey on deer.
If an area starts getting more ____________________……..
Its carrying __________________ for trees may increase.
NICHE
 Each population in a __________________ occupies a unique niche.
 What is a ____________?
An organisms _______ in its environment ( interactions with other organisms and with the _________________
environment)
What would be a chickens niche? _________________
ABIOTIC
-The ________________ parts of an organisms environment.
-Affects an organisms life
-Air currents, ______________, moisture, light and __________
BIOTIC
-All the ___________ organisms that __________ an environment
-All organisms depend on others ____________ or indirectly for food, shelter, __________________, and protection
VIDEO QUESTIONS:
 Which factor is abiotic?
A) # of predators
C) soil
B) disease
D) competition
 What is a habitat?
A) one of the world’s major ecosystem types that is classified according to its predominant vegetation and climate
B) An area that is suitable for a particular organism to live in
C) The entire area that an organism is found in
 Which of the following is not an abiotic factor?
A) amount of tree cover B) sources of water
C) elevation
D) climate
 Cheetahs and lions can coexist together on the plains of the Masai Mara National Reserve because:
A) Their different hunting styles allow them different niches
B) Lions and cheetahs mark their territory. Lions stay out of cheetah territory
 What is a niche
A) an area that is suitable for a particular organism to live in
B) the role that is played by a particular species in the ecosystem
Organisms and Their Environment (Some may be review)
What is Ecology??
• The __________ of _______________ that take place between __________________ and their
environment.
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• It explains how _____________ organisms affect each other and the ____________ they live in.
Population Density
The ______________ of individuals of the _________ species living in a given area.
Habitat & Niche
• Habitat is the _________ a plant or animal ____________
• Niche is an organism’s __________ way of ____________
The Nonliving Environment
• Abiotic factors- the _______________ parts of an organism’s environment.
• Examples include air currents, temperature, moisture, light, and soil.
• Abiotic factors affect an organism’s life.
POPULATION GROWTH
• Immigration-movement of organisms
into an area.
•
Emigration-movement of organisms out
of an area.
Exponential Growth
• Exponential Growth (J-Curve)
- Occurs when a population doubles at a regular rate.
DRAW J-CURVE:
LIMITING FACTORS
• Density-dependent limiting factors
- Competition
- _________________
- Parasitism
- Need for __________________
st
1 Level of Organization
• ___________________:
An individual living thing that is made of __________, uses energy, reproduces, responds,
grows, and develops
2nd Level of Organization
• Population:
A group of organisms, all of the same species, which _________________ and live in the same
place at the same time.
rd
3 Level of Organization
• Biological _________________:
All the populations of ________________ species that live in the same place at the same time.
4th Level of Organization
• ____________________: Populations of plants and animals that ____________ with each other
in a given area with the _____________ components of that area. (terrestrial or aquatic)
5th Level of Organization
Biosphere: The portion of Earth that _______________ life.
• Life is found in _________, on land, and in fresh and salt water.
• The _____________________ is the portion of Earth that supports living things.
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