1. Niches and Community Interaction
Isabelle Liu
Daniel Liu
Michael Jiang

2. The Niche Examples In this picture, it shows the
function of a tree in our life.
for example, the tree takes
some of the CO2 and makes
it into O2 while some carbon
is also stored in the soil
Textbook Definition: Describes not
only what an organism does, but
also how it interacts with biotic and
abiotic factors in the environment
Online Definition: The position or function of an organism in a community of plants and animals.

3. Niche (Continued) Tolerance Resources
Definition: The ability to survive and
reproduce under certain environmental
circumstances
Definition: The necessity of life for
any animal, such as nutrients.
Examples: Mosquitoes need blood to
survive. Otherwise, they die.
Example: Mosquitoes
Summer
Winter

4. Niche (Continued) Biological aspects of Niche
Definition: The biotic factors it
requires for survival.
Example:
Mosquitoes need our blood to survive, so they stab us with their needles.

5. Competition
Happens when organisms attempt to use the same limited resources.
examples: food, shelter, mates, etc.
Two kinds of Competition:
Intraspecific- between two or more species.
Interspecific- between one kind of species.

6. The Competitive Exclusion Principle
Also known as Gause's Law of Competitive Exclusion
This principle states: “Intraspecific Competition always ends with a winner and loser, and the loser usually dies out. Hence no two species can occupy the same niche in the same habitat at one time.”

7. Mutualism
Interaction between two species in which both of them benefit.

8. Parasitism
Interaction between two species in which one of them benefits and the other is harmed.

9. Commensalism
Interaction between two species in which one benefits and the other is not affected.

10. Sources

11. More Sources

12. More Sources http://www.biology-online.org/dictionary/
Biology Text Book