lecture 3 - intra and interspecific competition

Question 1

logistic equilibrium equation

Answer 1

dN/dt = r* (l - N/K)

Question 2

logistic growth equation

Answer 2

dN/dt = rN ( 1 - (n-k) / k)

Question 3

what is a logistic model?

Answer 3

a model of population growth where the rate of reproduction is proportional to both the existing population and the amount of available resources - density dependent

Question 4

what are the 3 assumptions of the logistic model?

Answer 4

1 - density dependence is linear
2 - population reaches k smoothly
3 - k is constant, yet may vary year to year

Question 5

r selected species

Answer 5

high fecundity
small body size
lots of offspring
little parental care
short generation time
live in unstable environment

Question 6

k selected species

Answer 6

live longer
larger body size
lots of parental care
fewer offspring
live in stable environment

Question 7

what is Gause’s law of competitive exclusion

Answer 7

2 species that compete for the exact same resource cannot stably coexist

Question 8

definition of a fundamental niche

Answer 8

the term for what an organisms niche would be in the absence of competition from other species

Question 9

definition of a realised niche

Answer 9

the set of conditions actually used by an animal/species after interactions with other species e.g. competition, have been taken into account