Lecture 7: Community ecology, Mostly competition

Question 1

interspecific competition

Answer 1

competition for resources between different species

Question 2

intraspecific competition

Answer 2

competition for resources within the same species

Question 3

interference competition

Answer 3

physically restricting another species from a portion of habitat

Question 4

exploitative competition

Answer 4

individuals interact indirectly as they compete for common resources, like territory, prey or food, the use of the resource to this individual will leave less for the other individuals

Question 5

Lotka-Volterra model formula for inter specific competition?

Answer 5

dN/dt=r1N1(1-N1/K1-alpha12N2/K1)

dN2/dt=r1N2(1-N2/K2-alpha12N1/K2)

Question 6

what is the Lotka-Volterra model used for?

Answer 6

to describe the dynamics of ecological systems in which two species interact, one a predator and one its prey

Question 7

competitive exclusion

Answer 7

when two species live together one species ends up excluding the other

Question 8

character displacement

Answer 8

evolutionary change that occurs when two similar species inhabit the same environment

Question 9

species coexistence

Answer 9

two species exist together in the same place at the same time

Question 10

paradox of the plankton

Answer 10

situation in which a limited range of resources supports an unexpectedly wide range of plankton species, apparently contradicting the competitive exclusion principle which state that when two species compete for the same resource, one will be driven to extinction.

Question 11

resolving the paradox of the plankton

Answer 11

in reality most species are kept below the carrying capacity from predator, weather, disease