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A low birth rate and environmental hazards are two things that can cause a population to decrease.
Disease. By the time the first colonists arrived, early visits by fishermen and explorers had exposed the natives to European diseases which devastated the populations along the East coast of North America.
A population of an animal would decrease because of animal testing. 3/5 people agree.
Immigration, decrease in infant mortality, increase in birth rate, decrease in mortality.
the price to decrease
The population decreased sharply due to war, slavery and European-brought diseases such as smallpox, for which Native American inhabitants didn't have any immunity.
Decreased
Several parts of the world are currently experiencing population decrease. These include countries in East Asia such as Japan, South Korea, and Taiwan, where low fertility rates and an ageing population contribute to a decline in the overall population. European countries like Germany, Italy, and Spain are also facing population decrease due to similar demographic trends. Additionally, many Eastern European countries, such as Bulgaria and Latvia, are experiencing population decline due to emigration and low birth rates.
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%.
A decrease in overall population/population density.
It is true to say that; If a prey population decreases, the population of its predator probably will decrease as well.
The population change is a 16.8% decrease.