Demography definition biology

  • How is demography defined?

    Demography is the science of populations.
    Demographers seek to understand population dynamics by investigating three main demographic processes: birth, migration, and aging (including death)..

  • What is a demography in biology?

    Broadly defined, demography is the study of the characteristics of populations.
    It provides a mathematical description of how those characteristics change over time..

  • Video transcript.
    Voiceover: Demographic transition is a model that changes in a country's population.
    It states that the population will eventually stop growing when the country transitions from high birth rates and high death rates to low birth rates and death rates, stabilizing the population.

A population consists of all the organisms of a given species that live in a particular area. The statistical study of populations and how they change over time is called demography. Two important measures of a population are population size, the number of individuals, and population density, the number of individuals per unit area or volume.

The statistical study of population dynamics, demography, uses a series of mathematical tools to investigate how populations respond to changes in their biotic and abiotic environments.While population size and density describe a population at one particular point in time, scientists must use demography to study the dynamics of a population. Demography is the statistical study of population changes over time: birth rates, death rates, and life expectancies.

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