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 decline in population was harmful to the Roman Empire because it led to a decrease in available labor, which impacted the agricultural and economic productivity of the empire. The loss of population also weakened the military strength of the empire, making it vulnerable to external threats. Additionally, with fewer people to pay taxes, the empire struggled to fund its administration and defense.
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.
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.
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.
All the prey being eaten.
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
A decrease in the marsh willow herb population in an area is likely to be caused by environmental changes such as increased water salinity levels, habitat destruction due to human activities, or competition from invasive species that outcompete marsh willow herb for resources. These changes can disrupt the plant's growth, reproduction, and ability to thrive in its habitat.
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 prey population, availability of suitable habitat, and decreased competition from other predators can all contribute to an increase in predator population. Additionally, favorable environmental conditions, such as abundant food sources and decreased human intervention, can also lead to a rise in predator numbers.
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.