1. Ecology Lesson 4 What are the types of interactions that occur in an ecosystem?

2. DO NOW Can you find the butterflies? BY YOURSELF AND IN YOUR SEAT, –Look around the room and see if you can find the butterflies. –Write on your paper its location. Over time, do you think the population size of butterflies that blend in with their surroundings would increase or decease?

3. Essential Question What are the types of interactions that occur in an ecosystem?

4. Vocabulary Natural selectionA process by which characteristics that make an individual better suited to its environment become more common in a species. AdaptationsThe behaviors and physical characteristics that allow organisms to live successfully in their environment. NicheThe role of the organism in its habitat, or how it makes its living. CompetitionThe struggle between organisms to survive as they attempt to sue the same limited resources. PredationAn interaction in which one organism kills another for food. SymbiosisA close relationship between to species that benefits at least one of the species.

5. Predator or prey? 1. wolf and rabbit 2. frogs and insects 3. wolf and moose 4. hawk and snake 5. mongoose and cobra

6. Do Now Turn to page 24. Read pages 24-31 silently.

7. Assignment Read pages 24-31. Complete the graphic organizer. 1.There are three major types of interactions among organism; competition, predation, and symbiosis

8. Summarization Activity Give 1 example of a predator/ prey relationship.

9. Do Now List 5 different animals. Get with a partner. Match predator/ prey relationships.

10. Competition 1.Many organisms compete for food, water, shelter, mates 2.It is a struggle between organisms to survive with the same limited resources

11. Predation 1.The interaction where one organism kills an other for food. 2.Predator- one that does the killing 3.Prey- one that is eaten 4.If an increase in predators, what will happen? 5.Prey population will decrease-  lower food supply will cause the predator population to decrease

12. 1.Predators- help kill prey, speed, tentacles, eyesight, hearing, poisonous 2. Prey- avoid being killed * mimicry- looking like something else that is dangerous * false coloring- looks like something bigger * protective covering- porcupine * camouflage- chameleon, walking leaf insect * warning colors- certain colors often are warning of poison. Predator and Prey Adaptations

13. Symbiosis 1. Mutualism-Both species benefit 2. Commensalism- one species benefits 3.Parasitism-one benefits the other is harmed 4.Parasite- the organism that benefits 5.Host- the organism it lives on

14. Analyzing Interaction Among Organisms Turn to handout 65 in your packet...\..\Ecology\ecology\69.doc

15. Assignment 1.Read the summary handout 69. 2.Answer the essential question in your packet. What are the types of interactions that occur in an ecosystem?

16. Ticket Out the Door Name and describe the types of interactions that occur in an ecosystem.