6 Flashcards
Resource partitioning?
Species use a limited resource in different ways
Resource partitioning is important for?
Establish coexistence for two species that use the same resource in the same way.
The shift in phenotypes through time in response to competition is known as?
Character displacement.
Character displace reduces the strength of?
Interspecific competition.
Some factors that can weight in the strength of competition?
How good species are at finding, acquiring, and defending a recourse, and how fully they can deplete it.
alpha and beta are related to the degree of?
Niche overlap between competing species.
Are alpha dependent to beta?
No
!!!The precise competition coefficient also depends on which shared resources are in short supply and how these resources are reduced by each species.
If we know alpha, do we know anything abt beta?
No
When alpha < 1?
Species 2 decreases growth of species 1 by a smaller amount that does an individual of species 1
When alpha > 1?
Individual of species 2 decreases growth of species 1 by a larger amount than does the individual of species 1
When alpha = 1?
The population growth of both species are the same: interspecific competition = intraspecific competition
If you have a Lotka-volterra growth model with two isoclines, competitive co-existence occur at?
The interaction of the isoclines when N1 & N2 > 0.
When species 1 or 2 wins depending on initial conditions, the equilibrium at the interaction of the two isoclines are?
Unstable.
