Week 3 Flashcards
what is the competitive exclusion principle
two species that use a limiting resource in the same way cannot coexist
what is resource partitioning
species using a limited resource in a different way
what kind of competition is inveigled with resource partitioning
interspecific
what are the two niche types
fundamental versus realized
what did connell look at
niche factors (distribution, survival, reproduction) of barnacles in scotland
what did peter and rosemary grant do
looked at competition in galapagos finches (beak size based on seed size)
what elements of competition are shown in the finch study done by Grant
interspecific competition, resource patitioning
what is a way to look at predator-prey relations
lotka-volterra models
what is the lotka volterra model equation
(dN)/(dt)=(rN)-(aNP)
N=number prey, P=number predators, r=population growth rate, a=capture efficiency
what is aNP
overall rate of prey removal
what happens when P=0
prey population grows exponentially
what is the equation for exploitation and population cycle
(dP/dt)=baNP-mP
m=mortality rate
b=efficiency with which prey are converted to predator offspring
what can prey do to avoid predation
behavioral or biochemical changes
what can predators do to gain prey
try to counteract prey advantages
what is the predatory arms race
prey and predators fighting to have the better advantage
