| A | B |
|---|
| population dynamics | the study of the changes in the number of individuals in a population and the factors that affect those changes |
| population density | a measure of the number of organisms that live in an area |
| pollution | the release of harmful substances into the air, water, or land |
| population size | the number of individuals of the same species that live in an area |
| carrying capacity | the maximum size that a population can reach in an ecosystem |
| competitor | a species characterized by a relatively longer life span, with relatively few offspring, when compared with an opportunist species. |
| opportunist | a species characterized by a relatively short life span, with relatively large quantities of offspring, as compared with a competitors species. |
| abiotic factor | a nonliving physical or chemical part of an ecosystem |
| ecosystem | all the living and nonliving things that interact in a particular environment |
| ecology | the scientific study of how living things interact with each other and their environment |
| emigration | the movement of individuals out of an ecosytem |
| immigration | the movement of an organism into a range inhabited by individuals of the same species |
| limiting factor | a factor or condition that prevents the continuing growth of a populationin a ecosystem |
| biotic factor | a living thing in an ecosystem |
