1. POS Interactions and interdependencies,
Illustrate how life-supporting environments meet the nee of living things for nutrients, energy sources, moisture, suitable habitat, and exchange of gases
Analyze an ecosystem to identify biotic and abiotic components, and describe interactions among these components
Describe examples of interaction and interdependency within an ecosystem (identify examples of dependency between species, and describe adaptations involved)

2. Unit A: Interactions in Ecosystems
Needs of all living things
Adaptations
Interactions in Ecosystems

3. An ecosystem is
Eco-place on earth where interactions between non-living and living can occur
Ex. Lake, desert, rotting log
Ecologist-person who studies
Ecology-study of

4. An organism interacts with the Abiotic and Biotic components of its’ ecosystem
Abiotic- non living
Ex. Air, water, rocks, climate, temperature
Biotic- living
Bacteria, plants, fungi, animals
*even dead
What are “antibiotics” then?

5. To count as a living thing:
Take in nutrients
Exchange gases
Move
Reproduce
Respond to stimuli (feel)
grow

6. Requirements of all living things…
Energy (food)
Water
Habitat (shelter)
Gas exchange (cellular respiration and photosynthesis)

7. Energy Food Sources Plants: Sunlight + nutrients from soil
Bacteria, Fungi: they will decompose organic matter (living things)
Animals:
Carbohydrates
lipids
Protein
Vitamins + minerals
Can you name some examples of each?

8. Water Is needed for: chemical reactions
transporter of nutrients and oxygen, waste (blood)
air-conditioner through perspiration

9. Habitat
All living organisms need a place to live, and often, require protection from the elements/predators
Water source, food source
Do humans have any impact on the habitats of other species? Give an example.

10. Gas Exchange Photosynthesis (song, youtube) Cellular respiration
Carbon dioxide + water + sunlight -> oxygen + sugar
Cellular respiration
Sugar + oxygen -> energy + carbon dioxide + water
Animals, plants at night

11. Adaptations for gas exchange
Lungs
ex. Humans, dogs, horses, whales
Stomata
Ex. plants
Skin
Ex. worms
Gills
ex. Fish

12. Adaptations
Genetically inheritable physical characteristics that help an organism survive in a given environment
Transportation
feet, hooves, fins, wings
Defense
claws, teeth, shell, blubber, camouflage, quills
Eating
bird beaks, teeth

13. Interactions in Ecosystems
Symbiosis is the close interaction of two species
Symbiosis
Mutualism
Parasitism
Commensalism

14. Mutualism Relationship where both species benefit +, +
Bees/birds pollinate flowers, flowers offer food source for bees
Can you spot the adaptations?

15. Parasitism One organism benefits while the other is harmed
Parasite +, host -
Mosquitoes take our blood, we get itchy
Can you spot the adaptations?

16. Commensalism One species benefits while the other is indifferent
Orchids use trees for support, trees neither suffer nor benefit

17. Parasitism-fleas + dogs/cats

18. Commensalism-barnacles

19. Mutualism-shark + remora

20. Mutualism-shrimp + goby fish

21. Mutualism-clown fish + anemone

22. Brainpop Ecosystems Carnivorous plants Cellular respiration symbiosis
Humans and the environment
photosynthesis