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13 terms

Chapter 5 key terms

STUDY
PLAY
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