1. Other Relationships in Ecosystems

2. Warm Up An organism that performs photosynthesis is called:
A. a decomposer
B. a consumer
C. an autotroph
D. a heterotroph

3. Quiz
Word bank:
energy, food chain, food web, autotrophs, heterotrophs

4. Competition
Competition occurs when organisms try to get the same resources (food, shelter, water, sunlight, living space)
Can take place between members of the same population or a different population

5. Coexisting
Coexist – organisms live in the same habitat but rely on different resources
Cooperation- helpful interaction among organisms living in a limited area

6. Interactions involving food
Predation- one animal hunts, kills and eats another
Predator- the animal that hunts and kills other animals
Prey- the animals that are hunted and eaten
Predator-prey relationship helps keep a balance

7. Symbiosis
Symbiosis- a close relationship between two different species living together
Mutualism- both species benefit
Commensalism- one species benefits while the other is not affected negatively or positively
Parasitism- one species benefits but other species is harmed
Parasite- lives in or on another organism
Host- the organism that the parasite lives in or on

8. Mutualism

9. Commensalism

10. Parasitism