people die or leave to a different place
A low birth rate and environmental hazards are two things that can cause a population to decrease.
A low Birth Rate and environmental hazards are two things that can cause a population to decrease.
Death - especially war & disease.
people die or leave to a different place
The deathrate exceeds the birthrate.
A decrease in the birth rate will cause a decrease in population over time.
The population of zoo plankton would decrease.
Death and migration are factors that can decrease hare population.
The biggest thing that can change a population is the availability of jobs in that are. 2 other things that can change the population of an area is what businesses are there and the crime rate.
Population crash
There are many contributing factors that could be the cause for a decrease in fox population. Over population, not enough food, disease, or over hunting or poaching any of these could be the reason for a decrease in the population.
The decrease in population is 900. The Percent change is 900 / 4500 X 100 = 20% Decrease Or = -20%.