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The two primary factors that determine a population's size are the availability of food, and the prevalence of predators.
In the abscence of predators, a population will grow until the food it consumes becomes equal to the food that is provided by the ambient ecosystem, available to the relevant population through the food chain. After that, the population cannot grow more unless the ecosytem suddenly is capable of providing more food.
Predators regulate populations as a result of the connection between predators and prey in ecosystems. If there is an increase in the size of the prey population, more food will be available to the predators, so their population will also grow. The increased predator population will put downward pressure on the prey population as the predators feed upon them. If the prey population suffers substantial decreases, the predator population will also suffer knock-on decreases as there will be less food available to them.
Wiki User
∙ 10y ago
Wiki User
∙ 12y agoit depends on the dependency of consumption of every organism in nature on an another... so in other words "the food web" :)
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What must occur for a population to decrease?
This could be anything, from earthquakes to migration to floods to disease, and so on, and so forth. In nature, population sizes naturally fluctuate even without such events, due to changes in the availability of resources, predation, and so on.
What is the name for the study of the changes in the sizes of populations?
Population dynamicstion…
How are changes in populations related to the availability of an ecosystems resources?
Population sizes are limited by the amount of resources that are available.
What sizes do cells come in?
what sizes do cells come in
Are peacoks eggs small?
they come in different sizes stupid they come in different sizes stupid they come in different sizes stupid yeah u dummy
What is ecological Stable Equilibrium?
the combination of population sizes that will ultimately result regardless of the initial combination of population sizes.
What is the name for the study of the changes in the sizes of population?
Population dynamicstion…
What is ecological unstable equilibrium?
an equilibrium point at which, if either population changes, the population sizes will diverge from, rather than return to, the equilibrium point; a combination of population sizes at which the two populations could coexist, but when the combination changed, no impetus exists to return to the equilibrium population sizes.
What must occur for a population to decrease?
This could be anything, from earthquakes to migration to floods to disease, and so on, and so forth. In nature, population sizes naturally fluctuate even without such events, due to changes in the availability of resources, predation, and so on.
What is a population graph used for?
Showing trends in changes of population sizes.
What does show the sizes of different age groups in a population?
Population pyramids
What show the sizes of different age groups in a population?
Population pyramid.
Show the sizes of different age groups in a population?
Population pyramids
How can you can explain why stones increase their sizes?
They don't ... they get smaller with time.
Explain spoon sizes?
alright mate
As the human population size increases?
as the human population sizes increases , what happens?
What methods are used to measure population sizes?
Census
