Chapter 5 key terms
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13 terms
Terms | Definitions |
|---|---|
 population | group of organisms of the same species that live together at one at one time and interbreed |
| carrying capacity | the largest population that an environment can support at any given time |
| predation | an interaction between two organisms in which one organism, the predator, kills and feeds on the other organism, the prey |
| coevolution | the evolution of two or more species that is due to mutual influence, often in a way that makes the relationship more mutually beneficial |
| parasitism | a relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed |
| symbiosis | a relationship in which two different organisms live in close association with each other |
| mutualism | a relationship between two species in which both species benefit |
| commensalism | a relationship between two organisms in which one organism benefits and the other is unaffected |
| niche | the unique position occupied by a species,both in terms of its physical use of its habitat and its function within an ecological community |
| fundamental niche | the largest ecological niche where an organism or species can live without competition |
| realized niche | the range of resources that a species uses, the conditions that the species can tolerate, and the functional roles that the species plays as a result of competition in the species' fundamental niche |
| competitive exclusion | the exclusion of one species by another due to competition |
| keystone species | a species that is critical to the functioning of the ecosystem in which it lives because it affects the survival and abundance of many other species in its community |
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