| A | B |
|---|
| Specialist | organisms that live in one particular area |
| Generalist | organisms that can live anywhere |
| Interspecific competition | different species competing for the same food |
| Energy pyramid | shows the producers on the bottom and the secondary consumers on the top |
| Scavenger | feed off dead animals |
| Parasitism | parasite benefit, host harmed |
| Mutualism | both organims benefit |
| Commensalim | one species benefits, the other is neutral |
| Native species | normally live and thrive in a particular ecosystem |
| Immigrant species | species that migrate into an ecosystem or are deliberately or accidentally introduced by humans |
| Indicator species | species that serve as an early warning that a community or ecosystem is being degraded |
| Keystone species | species that play roles effecting many other organisms in an ecosystem |
| Inverted pyramids | a pyramid whose producer is smaller than the consumer |
