| A | B |
|---|
| habitat | biotic and abiotic factors in the area where an organism lives |
| niche | what an organism does in the ecosystem |
| competitive exclusion | two species competing for same resources, one species will "win" |
| ecological equivalent | species that occupy similar niches, but in different areas |
| competition | when two organisms compete for the same resources |
| predation | one organism eats another |
| symbiosis | close ecological relationship between 2 or more organisms of different species |
| mutualism | symbiosis when both organisms benefit |
| commensalism | symbiosis when one organism benefits, the other is not affected |
| parasitism | symbiosis when one organism is harmed |
| population density | measurement of the number of individuals in an area |
| population dispersion | way in which individuals of a population are spread in an area |
| immigration | individuals moving into a population |
| emigration | individuals moving out of a population |
| carrying capacity | maximum number of individuals an enviroment can support of a species |
| density dependent factor | dependent upon the number of individuals in an area |
| density independent factor | not dependent upon the number of individuals in an area |
| succession | regeneration of an area or community that has been damaged |
| pioneer species | 1st organisms that live in an area |
| secondary succession | reestablishment of a damaged ecosystem where the soil was left intact |
| primary succession | type of succession that begins in a place that does not have soil and has never supported living organisms |
| biomes | large geographic areas with similiar climates and ecosystems |
| community | all the living organisms in an ecosystem |
| population | all the members of one species living in an ecosystem |
| coupled oscillation | When predator and prey population numbers are tied together |
| fundamental niche | the total niche that a species could occupy in an ecosystem |
| realized niche | the niche that a species actually occupies in an ecosystem |
| allopatric niche | a niche that overlaps with a potential competitor |
| sympatric niche | a niche that has been compressed by competition |
| r-strategist | a species that experiences exponential growth |
| K-strategist | a species that experiences logistic growth |
