1 / 20

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.

Download Presentation

Population-level Ecology

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  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.

More Related