Population
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10 terms
Terms | Definitions |
|---|---|
 natality | the number of births in a population |
| immigration | moving into a population |
| mortality | the number of deaths in a population |
| emigration | movement of individuals out of a population |
| population increase | The increase of population taking in account of emigration and immigration |
| population decrease | When the mortality rate exceeds the birth rate |
| exponential phase | population has low or reduced limiting factors, so it is free to expand exponentially into the habitat |
| transitional phase | The natality rate starts to fall and/or the mortality rate starts to rise. Natality is still higher than mortality so the population still rises, but less and less rapidly. |
| plateau phase | high levels of sexual arousal and pleasure that are maintained for variable periods of time |
| factors to limit population increase | water, food, space |
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