1. Ecosystems
And
Energy

2. Ecosystems
Population sizes change due to interactions among organisms.
ALL organisms, including humans, are part of food webs and depend on each other!

4. WHERE DO DECOMPOSERS GO ON THE PYRAMID?
Energy Pyramids
Trophic=FEEDING
WHERE DO DECOMPOSERS GO ON THE PYRAMID?

5. Do organisms spend energy?
EATING
ESCAPING
MATING
How
Do organisms spend energy?
LOST AS HEAT
CELL PROCESSES
HUNTING
MAINTAINING
HOMEOSTASIS
MOVEMENT
BREATHING
DEFENSE
GROWTH
REPRODUCTION
DIGESTING
FOOD

6. The amount of available energy decreases higher trophic level.
The Rule of 10
Organisms use ~90% of their energy for daily functions.
Most is lost as HEAT to the environment
10% of energy is STORED
or PASSED to the next trophic level.
The amount of available energy decreases higher trophic level.

7. The Energy Pyramid (the levels)
How much energy do producers get from the sun??
How much energy is passed on to Primary Consumers?
How much energy is passed on to Secondary Consumers?
Tertiary Consumers?

9. BIOMAGNIFICATION & BIOACCUMULATION
Concentration (Amount) of toxins INCREASE as it moves to higher trophic levels
Toxins INCREASE in an organisms body overtime.
Contaminants

11. Symbiosis

12. Symbiotic Relationships
Two organisms that live together
At least one of the organisms benefits from the relationship

13. Organism One Organism Two
Mutualism
Organism One Organism Two

14. Organism One Organism Two
Commensalism
Organism One Organism Two

15. Organism One Organism Two
Parasitism
Organism One Organism Two

16. What are the different kinds of symbiosis?
Mutualism
Commensalism
Parasitism
both organisms benefit
one organism benefits
one organism benefits
one organism is unaffected
one organism is harmed 16

17. COMPETITION

18. PREDATION
ONE SPECIES (PREDATOR) FEEDS ON ANOTHER (PREY)

19. MOSQUITO,
PARASITE OR PREDATOR?
EXPLAIN.