8-2 How Species Interact with Each Other

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A. An Organism’s Niche

• 1. A niche can be a range of conditions in which a species can survive.

B. Competition

• 1. Relationship in which different individuals or populations attempt to use the same limited resource.

C. Predation

• 1. When a predator feeds upon its prey.

C. Predation

• 2. The predator is the organism that feeds on another organism.

C. Predation

• 3. The prey is the organism fed upon.

D. Parasitism

• 1. Relationship between a parasite and its host.

D. Parasitism

• 2. A parasite lives and feeds on another organism.

D. Parasitism

• 3. The host is the organism a parasite gets it nourishment (food) from.

E. Mutualism

• 1. Relationship in which 2 species benefit each other for survival.

F. Commensalism

• 1. Relationship in which one organism benefits and another is not harmed or helped (neutral).

G. Symbiosis and Coevolution

• 1. Relationship in which 2 species live in close association.

G. Symbiosis and Coevolution

• 2. Over time, these relationships may coevolve their adaptations in response to each other.

Organism 1

Example Organism 2

Example

Commensalism

Mutualism

Parasitism