article : Symbiotic Relationships

Symbiotic Relationship	Living Apart (Not Interacting) Organism Organism A B	Living Together (Interacting) Organism Organism A B	Population Effects
Neutralism	0 0	0 0	Neither population affected

Competition

0 0

- -

Elimination of population most affected

Mutualism

- -

+ +

Populations must interact

Commensalism

- 0

+ 0

A must interact; B not affected

Parasitism

- 0

+ -

A (Parasite) must interact; B (Host) negatively affected

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