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.
Increase: Survival and Immigration Decrease: Death and Emigration
When a living thing is removed from a food web the population of it's predators will decrease and the population of its prey will increase, disrupting the ecosystem of the living thing.
Death - especially war & disease.
Two consequences of the Great Famine of Ukraine were a significant decrease in the health of the population due to malnutrition and starvation, and a decrease in industrial productivity as the workforce was severely impacted by the famine.
The population of zoo plankton would decrease.
A decrease in the birth rate will cause a decrease in population over time.
Death and migration are factors that can decrease hare population.
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%.