BIO LAB QUIZ SPATIAL

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10 Terms

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Learning objectives:

  1. Population growth factors

  2. Types of growth

  3. Factors controlling population growth rate

  4. Carrying capacity

  5. Demography

  6. Human population growth

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  1. Factors influencing population growth

  1. Births

  2. Deaths

  3. Immigration (individuals moving INTO the population)

  4. Emigration (individuals moving OUT of the population)

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How do I calculate change in the population size?

population change= (births + immigrants) - (deaths + emigration)

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Exponential Population growth

Occurs under IDEAL conditions

  1. resources are UNLIMITED

  2. NO migration

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How to calculate exponential growth

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Density- dependent factors

  1. Biotic Factors that slow population growth as density increases

  2. These LIMIT POPULATION GROWTH by causing a DROP in birth rates and an INCREASE in death rates

  3. Eventually, births=deaths and growth=0 a. The population size stabilizes b. This is the carrying capacity (K)!!

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Logistic population growth

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Examples of density-dependent factors

  1. INTRAspecific: WITHIN a species, competition for limited resources (low food supply, limited space)

  2. Predation

  3. Disease

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Demography

The statistical study of HUMAN populations

  1. Population size (N)

  2. Birth rate (b)

  3. Death rate (d)

  4. Age structure

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Population Age structure

the distribution of age groups within a population