Limiting factors

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  • 1. Ecosystems Limiting Factors
  • 2. Let’s suppose….  We have two mice…: and they produce the standard 56 “pups” (baby mice) each year. and each of these mice goes on to have 56 babies each year….
  • 3. Soon…..  We’d be over-run with mice on the planet!! Why doesn’t this occur?
  • 4. Limiting Factors A limiting factor is an abiotic or biotic factor that restricts the number of individuals in a population.
  • 5. Limiting Factors  Limiting 1. factors can include: Competitors
  • 6. Limiting Factors  Limiting 1. 2. factors can include: Competitors Disease and parasites
  • 7. Limiting Factors  Limiting 1. 2. 3. factors can include: Competitors Disease and parasites Weather
  • 8. Limiting Factors  Limiting 1. 2. 3. 4. factors can include: Competitors Disease and parasites Weather Fires
  • 9. Limiting Factors  Limiting 1. 2. 3. 4. 5. factors can include: Competitors Disease and parasites Weather Fires Available habitat
  • 10. Limiting Factors  Limiting 1. 2. 3. 4. 5. 6. factors can include: Competitors Disease and parasites Weather Fires Available habitat Predators
  • 11. Competitors-organisms both cooperate and compete •Birds of prey •Live in forests on the edge of fields •Eat mice and other rodents •Nest in trees Red-Tailed Hawk Barred Owl
  • 12. Disease and Parasites Diseases and parasites can be dependent on population size and habitat
  • 13. Weather Storms Drought Flooding Heat/cold
  • 14. Fires  Fires lead to succession which is a predictable change in the community over time.
  • 15. Available Habitat Human activities play a large role Development, damming rivers, clear cutting forests.
  • 16. Predators Predator-prey relationship can be a delicate balance between the two populations.
  • 17. Predators  As the prey population increases, the predator population increases. As the prey population decreases, then so does the predator population.
  • 18. Example: Lynx and Hare: