Term
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Definition
Lotka-Volterra Model
- Mathematical expression of competing species
- draws from the logistic population growth model
- Population size at time t is controlled by population size at N.
- Controlled by intraspecific competition
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Term
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Definition
Population Growth of Species 1
ΔN1/Δt=rmaxN1[(K1-N1-αN1)/K1)]
Population Growth of Species 2
ΔN2/Δt=rmaxN2[(K2-N2-αN2)/K2)]
When N1=K1, then N2=0
When αN2=K1, THEN N1=0 |
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Term
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Definition
| Species 1 and 2 can coexist, but environmental variation can cause a decline in either species, thus sending it on a declining trajectory and eventually local extinction |
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Term
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Definition
| Abundances of both species is greater than 0; each species is limited moreo by members of their own species than by members of the other species |
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Term
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Definition
| switched food items and habitat |
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Term
Increased competition
(adding interspecific competition) |
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Definition
| caused two of the species to shift to alternate food resources |
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Term
Tilman's Resource Ratio Competition Model
Mechanistic Model
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Definition
Predicts the outcome of comepetitive interactions based upon the supplu and depletion of resources in the environment
- Utilizes niche theory
- Out come of competition depends upon the ratio of resource supply and the ratio the resources are being used
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Term
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Definition
| Eventually the resource is depleted to some level where the resource supply to the environment is equal to the resource depletion from the environment |
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Term
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Definition
| The steady state concentration in the absence of organisms |
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Term
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Definition
ratio of conspution related to population growth
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Term
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Definition
| the ratio the two resources are supplied |
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