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SELF QUIZ: POPULATION ECOLOGY |

Questions | Answers |

1. Definitions: **Population**: all the individuals of a species living together in the same area.-
**Population Density**: population size (# individuals) per a given sized area. -
**Rate of Population Change**: (Birth rate + Immigration rate) – (Death rate + Emigration rate).
2. Definitions: **Biotic Potential**: maximum population growth rate.-
**Resistance Factors**: factors that decrease population growth rate. -
**Density-dependent Factors**: effects influenced by population size. -
**Density-independent Factors**: effects are independent of population size.
3. Examples of density-dependent factors: disease, competition, predation. Examples of density independent factors: avalanche, fire, severe weather. 4. Definitions: **Linear Growth**: Population grows by a fixed number (e.g., 100 animals/yr); produces a straight line on a graph**Exponential Growth**: J Curve. Population grows by a percentage; J curve-
**Logistic Growth**: S curve. Population shows initial exponential growth and then stabilizes its population size near its carrying capacity. -
**Overshoot and Crash**: population size rises and then falls abruptly.
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