Competition Models

Which growth rate equation is altered in the Lotka-Volterra Model, what does this accommodate for?

Logistic , interspecific competition

What does a(12) represent in the Lotka-Volterra Model

Effect of one individual of species 2 on species 1

What does a(21) represent in the Lotka-Volterra Model

Effect of one individual of species 1 on species 2

a(12) = 0

No competition between species

a(12) = 1

Species 1 and 2 are interchangeable

a(12) > 1

Interspecific competition is greater than intraspecific competition

a(12) < 1

Intraspecific competition is greater than interspecific competition

What type of competition does the Lotka-Volterra Model focus on, what does this determine

Interspecific competition , whether and when two species can coexist

Line indicating point at which no population growth occurs is called..

Isocline .. of zero population growth

What two factors are limiting growth and decline of population growth at this isocline, and which species is this outlined for?

Increasing r and limiting K , species 1

What outcome of the Lotka-Volterra Model is represented in this graph, what does this mean for competition?

Either species wins , interspecific is greater than intraspecific

What outcome of the Lotka-Volterra Model is represented in this graph, what does this mean for competition?

Species coexist , intraspecific is greater than interspecific

What outcome of the Lotka-Volterra Model is represented in this graph, which species is above its isocline?

Species 1 wins , species 2

What outcome of the Lotka-Volterra Model is represented in this graph, which species is above its isocline?

Species 2 wins , species 1

Competitive exclusion principle

Two species can only coexist in a stable environment if there is niche differentiation

What are the two conditions that allow species to coexist

No competition , stable environment