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Chapter 4 Vocab.

TermDefinition
Population Density Number of organisms per unit of living area.
Dispersion another characteristic of a population.
Density-Independent Factor environmental factor, such as storms and extreme heat or cold, that affects populations regardless of their density.
Density-Dependent Factor environmental factor, such as predation, disease, and competition, that depends on the number of members in a population per unit area.
Population Growth Rate How fast a specific population
Emigration is the term ecologists use to describe the number of individuals moving from a population.
Immigration is the term ecologists use to describe the number of individuals moving into a population.
Carrying Capacity the maximum number of individuals in a species that an environment can support for the long term.
Demography study of human populations based on size, density, movement, distribution, and birth and death rates.
Demographic Transition population change from high birth rates and death rates to low birth rates and death rates.
Zero Population Growth (ZPG) occurs when births plus immigration equals deaths plus emigration.
Age Structure the number of males and females in each of three age groups: pre-reproductive stage, reproductive stage, and post-reproductive stage.
Created by: Hilda_Munoz
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