variation in population size

Question 1

maximum population size that an ecosystem can support

Answer 1

carrying capacity (vary’s due to abiotic and biotic factors)

Question 2

abiotic factors

Answer 2

amount of light, water, space available, temperature

Question 3

biotic factors

interspecific competition

Answer 3

1. between different species - compete for same resources
2. resources available to both populations reduced
3. can lead to less energy for growth and reproduction = population size lower
4. one better adapted - outcompetes other

Question 4

biotic factors

intraspecific competition

Answer 4

1. within a species
2. population of a species increases when resources plentiful. higher population - more competition for same amount of space and food
3. resources such as light and food become limiting - isnt enough for all organisms and population declines
4. smaller population less competition better for growth and reproduction population grows again

Question 5

predation

predator prey relationships

Answer 5

1. prey population increase = more food for predators. predator population grows.
2. predator population increases, more prey eaten, prey population falls
3. less food for predators so population decreased