| A | B |
|---|
| immigration | movement of individuals into a population |
| emmigration | movement of individuals out of a population |
| limiting factors | factors that prevent the continuing growth of a population in an ecosystem - examples include predation, competition, and disease |
| population size | number of individuals in a population at a given time |
| population density | number of individuals in a certain space at a particular time |
| carrying capacity | maximum number of individuals an ecosystem can support with the available space and resources |
| population dymanics | study of why populations change and what causes them to change |
| population growth | births + immigrants > deaths + emmigrants |
| population decline | births + immigrants < deaths + emmigrants |
| zero population growth (stability) | births + immigrants = deaths + emmigrants |
| population | group of organisms of the same species (type) living in the same place at the same time |
| density dependent limiting factors | limiting factors that become more severe with greater population density or crowding - examples: disease, predation, and competition |
| density independent limiting factors | limiting factors that have the same effect regardless of population density or crowding - i.e. natural disasters like wild fires or other types of habitat loss |
