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BIOL 206 Chp 11 Competition
Terms in this set (23)
The interaction among two or more species over a limiting resource that results in a decrease in the population size of at least one of the species.
Competition among members of the same species.
A phenomenon in plants in which individuals at high density have smaller population size but larger individuals.
A mechanism of competition in which one species reduces the amount or availability of the limiting resource.
A mechanism of competition in which one species actively inhibits another from obtaining the resource.
Describes a plant that produces and releases chemicals that inhibit the growth of nearby individuals of the same or another species.
A mechanism of competition in which a plant establishes access to resources by establishing itself and occupying space.
The summed effects of all competitors.
A descriptive definition of the niche as the ecological role of the species in the community.
The set of biological and physical resources that determine the growth, survival, and reproduction of a species. Also called Hutchinsonian niche.
The variation among individuals in a population in their resource use.
The difference between two niches measured by the difference in the mean use of a resource.
The extent of common use of a resource by two or more species.
Poor competitors that exploit disturbances, where they face fewer competitors.
The niche in the absence of competition.
The subset of the fundamental niche that results from competition.
The extinction of one species due to competition from another.
competitive exclusion principle
The concept that two species cannot coexist on a single limiting resource.
A shift in the niches of competing species that reduces competition among them. Natural selection favors those individuals in each species whose resource use overlaps less with that of the other species.
Populations occurring in different places.
Describes populations that occur in the same place.
The evolutionary diversification of a group of species, often in newly colonized regions, into a number of new species in new niches.
A measure of the competitive effect of one species on another, determined by the overlap in their resource use.
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