| A | B |
|---|
| carrying capacity | number of organisms an environment can support |
| emigration | when members of a species move to a new location to meet their needs |
| immigrant | when individuals move to another area and establish a permanent residence |
| limiting factor | when at least one staple of life is missing from an environment |
| migration | the movement from one region to another |
| population | the number of animals in a certain region |
| population density | the number of living creatures in relationship to the available space |
| population dispersion | the spacing pattern of individuals in a given habitat |
| neutralism | an interaction in which neither species is affected |
| random dispersion | the spacing patterns in a population where spaces are unpredictable |
| adaptation | the process of change to become better suited to live |
| autotroph | organisms that use the sun's energy through photosynthesis |
| apex predator | a carnivore at the top of the trophic hierarchy with no natural predators |
| carnivore | meat eater |
| competition | a natural interaction in which an organism attempts to use a resource at the same time as another organism |
| commensalism | when 1 species benefits from the interaction of another (and the other is not harmed) |
| herbivore | plant eater |
| interaction | the effect that organisms living in a community have on each other |
| keystone species | a species on which others in the community rely on and whose removal would change the ecosystem drastically |
| predation | when a predator captures all of the prey |
