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How do ecologists study populations?

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Luke Gardner

on 18 October 2013

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Transcript of How do ecologists study populations?

How populations grow and limits to growth.
What happens during exponential growth?
What factors effect population growth?
How do ecologists study populations?
Factors that can effect population size are birthrate, death rate, and the rate at which individuals enter or leave a population. For example if there are no of few gazel in the savana then animals like cheetas will not increase any more in population but may even decrease.
Under ideal conditions with unlimited resources a population will grow exponentially.
Researchers study populations geographic range, density and distribution, growth rate, and age structure. These sicentist are the same scientist that also work on the zooinverse project.
What is logistic growth?
Logistic growth occurs when a population's growth slows then stops, following a period of exponential growth.
What factors determine carrying capacity?
Acting seperately or together, limiting factors determine the carrying capacity of an environment for a species.
What limiting factors depend on population density?
Density-dependent limiting factors include competition, predation, herbivory, parasitism, disease, and stress from overcrowding.
What limiting factors do not typically depend on population density?
Unusuall weather such as hurricanes, droughts, or floods, and natural disasters such as wildfires, can act as density-independent limiting factors.
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