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APES MOD 6
population
| Term | Definition |
|---|---|
| exponential growth | Growth in which some quantity, such as population size or economic output, increases at a constant rate per unit of time. An example is the growth sequence 2, 4, 8, 16, 32, 64 and so on; when the increase in quantity over time is plotted, this type of gro |
| birth rate | crude birth rate |
| crude death rate | Annual number of deaths per 1,000 people in the population of a geographic area at the midpoint of a given year |
| death rate | See crude death rate |
| emigration | Movement of people out of a specific geographic area |
| family planning | Providing information, clinical services, and contraceptives to help people choose the number and spacing of children they want to have. |
| immigration | Migration of people into a country or area to take up permanent residence |
| life expectancy | Average number of years a newborn infant can be expected to live. |
| migration | Movement of people into and out of a specific geographic area. |
| biotic potential | Maximum rate at which the population of a given species can increase when there are no limits on its rate of growth. |
| dieback | Sharp reduction in the population of a species when its numbers exceed the carrying capacity of its habitat |
| K-selected species | Species that produce a few, often fairly large offspring but invest a great deal of time and energy to ensure that most of those offspring reach reproductive age. |
| r-selected species | Species that reproduce early in their life span and produce large numbers of usually small and short-lived offspring in a short period. |
| survivorship curve | Graph showing the number of survivors in different age groups for a particular species |
| age structure | Percentage of the population )or number of people of each sex) at each age level in a population |
| crude birth rate | Annual number of live births per 1,000- people in the population of a geographic area at the midpoint of a given year |
| demographic transition | Hypothesis that countries, as they become industrialized, have declined in death rates followed by declines in birth rates. |
| fertility | The number of births that occur to an individual woman or in a population |
| infant mortality rate | Number of babies out of every 1,000 born each year that die before their first birthday. |
| population change | An increase or decrease in the size of a population, It is equal to (Births + Immigration) - (Deaths + Emigration) |
| replacement-level fertility | Number of children a couple must have to replace them. The average for a country or the world usually is slighty higher than 2 children per couple (2.1 in the United States and 2.5 in soe developing countries) because some children die before reaching |
| total fertility rate (TFR) | Estimate of the average number of children who wwill be born alive a woan during her lifetime if she passes thorugh all her childbearing years (ages 15[[endash]]44) conforming to age-specific fertility rates of a given year, In simpler terms, it is a |
| carrying capacity | Maximum population of a particular species that a given habitat can support over a given period |
| environmental resistance | All the limiting factors that act together to limit the growth of a population |
| logistic growth | Pattern in which exponential population growth occurs when the population is small, and population growth decreases steadily with time as the population approaches that carrying capacity |
| population density | Number of organisms in a particular population found in a specified area or volume |
| population dispersion | General pattern in which the members of a population are arranged throughout its habitat |
| population distribution | Variation of population density over a particular geographic area. For example, a country has a high population density in its urban areas and a much lower population density in rural areas. |
| Density Dependent Factor | Factors whose effects on the size or growth of the population vary with the population density. Examples include food, predation |
| Density Independent Factor | Any factor limiting the size of a population whose effect is not dependent on the number of individuals in the population. Examples usually include natural disasters |
Created by:
Jinny1255
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