1. Evolution to Ecology Chapters 19 - 20

2. Problems of the 21 st Century Increasing population – 6.9 billion –Struggle for resources – food, water, space, air 6 th mass extinction event –5 th was 65 MYA – dino extinction –20% of all species lost in past 2000 years Ozone layer degraded by CFC’s –Damaging UV rays Greenhouse effect & Global Warming –CO2, methane, water vapor (all results of cellular respiration)

3. We are all connected

4. Ecology Study of interactions & interdependence of life

5. What is life?

6. Life evolved from a common ancestor

7. Continental drift gave us different habitats

8. Regional differences (habitat) reflect adaptations for survival

9. Adaptations for survival gave us different niches

10. Niche - Role an organism plays in the environment generalist specialist

12. Ecosystem (habitat location)

13. Ecosystem is made of… Biotic factors Resources Abiotic factors

14. Resource “tolerance” to changes in ecosystem Tolerant (“fight”) – Acclimation –Become “used to” a range of conditions within tolerance levels Conformer – changes internal conditions to suit the environment –Ex: ectothermic lizards Regulator – uses NRG to keep internal conditions stable (homeostasis) –Ex: bees and their jobs Intolerant (“flight”) – Migration or Dormancy

15. Population Grouping of species living in the same place, at the same time, able to interbreed successfully.

17. “r” strategists vs. “k” strategists

18. Populations are described by… Size Density dispersion

19. Dispersion types

20. Survival of a population Based on Darwin’s theory of evolution and available resources –O –S –V –NS

21. Recipe for survival Requires resources (biotic, abiotic)

22. Population Graphs Darwin’s Model of overproduction

23. Carrying Capacity

24. Limiting Factor