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Population Size, The study of how organisms interact with other organisms…
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Demographics can be utilized to determine population size or the total number of individuals in a population.
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Demographics can be used to determine population density: the number of individuals per unit area or volume.
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The arrival of new people within a givein population is known as immigration and it alters the population distribution.
When a person moves out of a given popualation, known as emigration. The population distribution changes.
When the population size increases the same per given time interval, the trend for the population is known as the exponential growth.
Number of births and deaths are equal, and therefore the population growth is zero.
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The population growth can be calculated by the per capita birth rate in which subtracts the death rate from the populations birth rate.
The population size may experience population growth over time in which the population in a given area increases.
The population growth under ideal conditions (food, shelter, and resources) is known as biotic growth.
Density limiting factor that causes the population growth rate to stop increasing because predators are killing them off.
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Disease is another density limiting factor that increases the death rate compared to the birth rate.