All living things need food, water, shelter and space to survive. Aas long as organisms have
all of these things available to them their population will continue to grow. However,
populations cannot grow forever. Some form of environmental resistance will stop the
population’s growth. The form of environmental resistance is called a limiting factor since it
limits the population. However, limiting factors may also increase a population. We will look at
many different limiting factors and classify them into density independent factors and density
dependent factors.