1. CHAPTER 1E Interactions of Living Things

2. Everything is Connected….. ALL Living things are connected somehow Ecology – the study of how they are connected

3. 2 Parts of an Environment….. Biotic – Living parts (other organisms) Abiotic – Non-living parts (air, water, space, man-made objects)

4. Organization in the Environment

5. Population – made up of a group of organisms of the same species living in the same area Community – made up of all the populations living in the same area Ecosystems – made up of a community and the ABIOTIC factors in that community

6. Biosphere – Part of the Earth where life exists

7. Living Things Need Energy….. Producers – Organisms that use sunlight to make their own food (photosynthesis)

8. Consumer – An organism that eats another organism

9. 3 Types….. Herbivore – eats only plants (grasshoppers, prairie dogs, and bison)

10. Carnivore – eats only meat (coyotes, hawks, badgers, owls)

11. Omnivores – eats both plants and meat (grasshopper mouse)

12. Scavengers are omnivores that eat dead plants and dead animals (turkey vulture)

13. Decomposers….. Organisms that get their energy by eating dead organisms (bacteria and fungus)

16. Food Chains and Food Webs Food chain – shows how energy flows from one organism to another

17. Food Web – diagram that shows the feeding relationships between organisms

18. Energy Pyramid A diagram that shows an ecosystems loss of energy

19. Balance in an Ecosystem Gray Wolves……GOOD or BAD ?

20. Types of Interactions….. Limiting Factors – controls the size of a population in a given Ecosystem. –Food –Water –Air –space

21. Carrying Capacity – The largest population that an environment can hold.

22. Interactions Between Organisms 1. Competition 2. Predator and Prey 3. Symbiosis 4. Coevolution

23. Competition When two or more organisms try to use the same resource –Food –Water –Space

24. Predator and Prey Predator – eats prey Prey – gets eaten

25. Symbiosis Two species live together in a long-term relationship Both benefit One benefit and one unaffected One benefit and one harmed (die)

26. Mutualism – Both organisms benefit

27. Commensalism – One organism benefits and one is unaffected

28. Parasitism – One organism benefits and one is harmed

29. Coevolution Relationships that change over time so both organism can survive. Ant and Acacia tree