The aliens start attacking them more
A low birth rate and environmental hazards are two things that can cause a population to decrease.
probably because they are an easy meal for hunters (animal hunters not people)
Migration can affect population distribution by causing the population of one area to increase while simultaneously decreasing the population of another. This can also cause one area to be more densely populated than another.
disease.
The development of agriculture
An increase in prey availability is most likely to cause an increase in a predator population as more food leads to better survival and reproduction rates for the predators. Additionally, a decrease in competition from other predators or a decrease in predation pressure from other sources can also contribute to a rise in predator numbers.
Increases in prey population or availability, favorable environmental conditions, and reduced competition from other predators are most likely to cause increases in a predator population.
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.
An increase in the prey population is most likely to cause increases in a predator population due to an abundant food supply. This can lead to more successful breeding and survival rates for predators.
The predator eats the prey in the food chain. As the population is stable, the food chain won't wreck. There's an interdependence between the prey and the predator in the food chain. The prey should be there to feed some food to their predator, and the predator also needs to be there to control their prey population from exploding. Changes in animal population can wreck the food chain. If the prey population decreases, the predator population would also decrease as there'll be less food for them to eat. If the predator population decreases, the prey population would increase because less predators means less preys gets hunted down, so there'll be more preys. If the prey population increases, then the predator population would also increase because there'll be more food for them to eat and there should be more predators to take more control patrol of their prey population. If the predator population increases, then the prey population would decrease because more predators means more preys gets hunted down, so there'll be less preys. Animal Population Change Formula: Prey Decrease→Predator Decrease Predator Decrease→Prey Increase Prey Increase→Predator Increase Predator Increase→Prey Decrease
True, if the number of prey decreases, the predators will have nothing left to eat and will slowly starve. In some cases the predators will become cannibalistic (eat its own species) to prevent it self from starving to death.So the answer is true, if a prey population decreases the population of its prey will decrease as well.
A decrease in the birth rate will cause a decrease in population over time.
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.
an increase in the spider population
Decreased mortgage interest rates and a decrease in construction workers' wages would both be likely to cause the selling price of a house to decrease.
Polluted water can cause a decrease in animal population. This is possible if the pollutant is toxic and harms creatures in the water or those that drink the water.