| A | B |
|---|
| Biotic | Biological influences, living things for an organism |
| Abiotic factor | Physical or no living things that influence organism |
| Habitat | Area an organism lives |
| Niche | Physical and biological conditions of organism,the way these are used |
| Resource | Things needed to survive,water food,light |
| Competitive exclusion principle | No 2 species can occupy the same niche at the same time |
| Predation | One organism captures and eats another |
| Symbiosis | Two species live close together,3 types |
| Mutualism | Both species benefit from each other |
| Commensalism | One organism is not harmed or helped |
| Parasitism | One organism lives on or inside another |
| Ecological succession | Change in an ecosystem,older ones die and new ones move in |
| Primary succession | Growth of organisms where there is no soil,such as on volcanic soil |
| Pioneer species | First species in an area |
| Secondary succession | Restore ecosystem to original look,such as after a wildfire plants regrow |
