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Population-level Ecology

Population-level Ecology. How individual actions “add up” to whole-population performance. A metapopulation is made up of small, isolated populations. Individual butterflies. Habitat patches. Figure 52-11. Although some subpopulations go extinct over time…. Extinct. Extinct.

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Population-level Ecology

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  1. Population-level Ecology How individual actions “add up” to whole-population performance

  2. A metapopulation is made up of small, isolated populations. Individual butterflies Habitat patches Figure 52-11 Although some subpopulations go extinct over time… Extinct Extinct …migration can restore or establish subpopulations. Migration

  3. Figure 52-10 Glanville fritillaries are an endangered species They live on patches of certain host plants within meadows

  4. High r Moderate r Figure 52-5 Low r Very low r

  5. Density dependence: Growth rate slows at high density. Carrying capacity Figure 52-7a Later growth falls to zero Early growth is rapid Growth begins to slow

  6. Logistic growth in ciliates Paramecium aurelia alone Figure 52-7b Paramecium caudatum alone

  7. r-type organisms “Grow fast, breed small, and die young.” K-type organisms “Grow big and strong, delay and reduce breeding.” Figure 52-4

  8. Figure 52-3

  9. Survival declines at high population density. Figure 52-8a

  10. Fecundity declines at high population density. Figure 52-8b

  11. 6.63 billion people in January 2008 Figure 52-16

  12. Figure 52-16-Table 52-2

  13. !!! Figure 52-16-Table 52-2

  14. Figure 52-16-Table 52-2

  15. Current High Medium Figure 52-17 Low

  16. Figure 52.23 Ecological footprint in relation to available ecological capacity Campbell & Reece, 6th ed.

  17. Common primroses live in sunlit gaps in forests. Figure 52-14a

  18. Age structure of primrose population varies with age of gap. Young gap with high light levels Figure 52-14b Older gap with low light levels

  19. Developed country (Sweden) Developing country (Honduras) Figure 52-15 2050 projections 2050 projections 2000 data 2000 data

  20. Figure 52.21 Demographic transition in Sweden and Mexico, 1750-1997 Campbell & Reece, 6th ed.

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