Population growth and competition

What is competition

When different species need the same resources and have the same,e abiotic and biotic role

What biotic factors can affect population size

Mates

Food availability

Predators

What abiotic factors can affect the population size

Temperature

Water availability

Territory

Explain lag phase

Slow increase in population

Population is small to start with

Explain exponential phase

Rapid increase in population size resources are not limiting

Birth rate bigger then death rate

No competition

Explain stationary phase

Population size plateaus

Carrying capacity reached due to limiting resources

Intraspecific competition for resources

Birth=death

Explain death phase

Death rate is bigger than birth rate

Environment can no longer support population because of how the organism has changed the environment

Describe the predator prey relationship graph

1) prey population increases rapidly because there is a lot of food and mates available and they are not being eaten by predators

2)population of predator begins to increase because there are more gazelles available for them to eat so they can survive and reproduce

3) so prey population decreases because they are being eaten

4)predators population decreases because there is less food available so there is more intraspecific competition

This cycle takes …………

What is a predator

An organism that hunts prey