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14 Cards in this Set

  • Front
  • Back
Occurs when two or more species evolve in responce to each other.
Is a close, long term association between two or more species.
The relationship between a parasite and its host.

One benefits; one doesnt.
A symblic relationship in which all participating species benefit.
Is an ecological relationship in which one species benefits and the other is not obviously effected.
Fundamental Niche
The total niche than an organism could potentially use within an ecosystem.
Situations in which two or more organisms attempt to use the same scace resource.
Realized Niche
The part of a fundamental niche that an organism actually occupies as a direct result of competition.
Competitive Exclusion
The process in which one species is ot competed and dies out within an ecosystem.
The regular progession of species replacement in a developing ecosystem.
Primary Succession
When succession takes place on land where there was no previous growth.
Secondary Succession
When succesion occurs in areas where there has been previous growth, such as in abondoned fields or forest clearings.
The ability of an ecosystme to resist change in the face of disturbance
Keystone Species
A species whose niche affecs many others in the ecosystem and that cannot be readily replaced if lost.