1. KEY CONCEPT Every organism has a habitat and a niche.

2. A habitat differs from a niche.
A habitat is all aspects of the area in which an organism lives.
biotic factors
abiotic factors
An ecological niche includes all of the factors that a species needs to survive, stay healthy, and reproduce.
food
abiotic conditions
behavior

3. Resource availability gives structure to a community.
Species can share habitats and resources.
Competition occurs when two species use resources in the same way.
Competitive exclusion keeps two species from occupying the same niche.

4. Competitive exclusion has different outcomes.
One species is better suited to the niche and the other will either be pushed out or become extinct.
The niche will be divided.
The two species will further diverge.

5. Ecological equivalents are species that occupy similar niches but live in different geographical regions.
Madagascar
South America

6. All of the environmental features in an area where an organisms lives are known as its
Niche
Habitat
Community
Behavior

7. The lion’s ecological niche includes its behavior and
The shade trees on the savannah
Its position on the food web
An ecological equivalent
All the nearby watering holes

8. The idea that two species cannot occupy the same niche is known as
Ecological equivalence
Niche partitioning
Evolutionary response
Competitive exclusion

9. When two species compete for the same resources, their ecological niche may
Become extinct
Adapt to one species
Not favor one of them
Split into two niches

10. Ecological equivalents are species that occupy similar niches
In different geographical regions
With plenty of food
In different types of habitats
After niche partitioning