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Fig. 53-14

Fig. 53-14. (a) Clumped. Fig. 53-4. (b) Uniform. (c) Random. Births. Deaths. Fig. 53-3. Births and immigration add individuals to a population. Deaths and emigration remove individuals from a population. Immigration. Emigration. 8,000. 6,000. Fig. 53-11. Elephant population.

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Fig. 53-14

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  1. Fig. 53-14

  2. (a) Clumped Fig. 53-4 (b) Uniform (c) Random

  3. Births Deaths Fig. 53-3 Births and immigration add individuals to a population. Deaths and emigration remove individuals from a population. Immigration Emigration

  4. 8,000 6,000 Fig. 53-11 Elephant population 4,000 2,000 0 1900 1920 1940 1960 1980 Year

  5. 2,000 dN 1.0N = dt 1,500 dN 0.5N Fig. 53-10 = dt Population size (N) 1,000 500 0 0 5 10 15 Number of generations

  6. Exponential growth 2,000 dN 1.0N = dt 1,500 Fig. 53-12 K = 1,500 Population size (N) Logistic growth 1,000 1,500 – N dN 1.0N = 1,500 dt 500 0 0 5 10 15 Number of generations

  7. 1,000 800 Fig. 53-13a Number of Paramecium/mL 600 400 200 0 0 5 15 10 Time (days) (a) A Paramecium population in the lab

  8. Density-dependent birth rate Density-dependent birth rate Density- independent death rate Density- dependent death rate Birth or death rate per capita Equilibrium density Equilibrium density Fig. 53-15 Population density Population density (a) Both birth rate and death rate vary. (b) Birth rate varies; death rate is constant. Density-dependent death rate Density- independent birth rate Birth or death rate per capita Equilibrium density Population density (c) Death rate varies; birth rate is constant.

  9. Fig. 53-20 Snowshoe hare 160 120 9 Lynx Number of lynx (thousands) Number of hares (thousands) 80 6 40 3 0 0 1850 1875 1900 1925 Year

  10. Table 53-1

  11. 1,000 I Fig. 53-6 100 II Number of survivors (log scale) 10 III 1 0 50 100 Percentage of maximum life span

  12. Rapid growth Slow growth No growth Afghanistan United States Italy Male Female Age Male Female Age Male Female 85+ 85+ 80–84 80–84 Fig. 53-25 75–79 75–79 70–74 70–74 65–69 65–69 60–64 60–64 55–59 55–59 50–54 50–54 45–49 45–49 40–44 40–44 35–39 35–39 30–34 30–34 25–29 25–29 20–24 20–24 15–19 15–19 10–14 10–14 5–9 5–9 0–4 0–4 10  8 6 4 2 0 2 4 6 8 10  8 6 4 2 0 2 4 6 8 8 6 4 2 0 2 4 6 8 Percent of population Percent of population Percent of population

  13. 7 6 5 Fig. 53-22 4 Human population (billions) 3 2 The Plague 1 0 8000 B.C.E. 4000 B.C.E. 3000 B.C.E. 2000 B.C.E. 1000 B.C.E. 0 1000 C.E. 2000 C.E.

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