Chapter 20
Terms
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- Density-Dependent Factors
- Resource limitations.
- Emigration
- The movement of individuals out of a population.
- Logistic Growth
- A model of population growth in which birth and death rates vary with population size and are equalt at the carrying capacity.
- Survivorship Curves
- They show the likelihood of survival at different ages throughout the lifetime of the organism.
- Growth Rate
- The amoud by which the population's sized changes in a given time.
- Limiting Factor
- A factor that restrains the growth of a population.
- Density-Independent Factors
- Reduce the population by the same proportion, regardless of the populations size.
- Inbreeding
- Matting with relatives.
- Birth Rate
- The number of births occurring in a period of time.
- Immigration
- The movement of individuals into a population.
- Death Rate
- The number of deaths in a period of time.
- Exponential Growth
- A model of population growth in which the birth and death rates are constant
- Hunter-Gatherer Lifestyle
- Obtaining food by hunting animals and gathering uncultivated plants.
- Carrying Capacity
- The number of individuals the environment can support over a long period of time.
- Age Structure
- The disturbution of individuals among different ages in a population.
- Population Denisty
- Measures how crowded a pouplation is.
- Life Expectancy
- How long on average an individual is expected to live.
- Dispersion
- The spatial distribution of individuals within the population.