| A | B |
|---|
| carrying capacity | maximum number of individuals that an environment can support for a long term. |
| density independent factor | any factor in the environment that does not depend on the number of members in a population |
| density dependent factor | any factor in the environment that depends on the number of members in a population per unit area |
| dispersion | the pattern of spacing a population on within an area |
| emigration | the term ecologist use to describe the number of individuals moving away from a population |
| population density | one characteristic of a population |
| population growth rate | an important characteristics of the population is its growth rate |
| age structure | the number of males and females in each of 3 age groups: preproductive, reproductive and post-reproductive |
| demographic transition | a change in population from high birth and dead rates to low birth and death rates |
| demography | the study of human population size, density, distribution, movement and birth and death rates |
| zero population growth | occurs when the birthrate equals the death rate |
