1. Relationships within Ecosystems

2. An organism is ….. Any living thing Unicellular (one celled) or
Multicellular (many celled)
Can be as small as single celled bacteria
Or as large as a whale!

3. ECOSYSTEM
All the living (biotic) and the non-living (abiotic) factors within an area.
Example: Coral Reef, desert, rainforest

4. Aquatic (Water) Ecosystems:
Freshwater: Ponds, streams, lakes, and rivers
less than 1% salt content(salinity).
Marine: Oceans, seas, and gulfs
salt content (salinity) of at least 3.5%
(Brackish= more than 1% but less than 3.5%)

5. Terrestrial (land) Ecosystems
Ecosystems on land
Forests
Rainforests
Deserts
Tundra

6. Organisms in an Ecosystem are be categorized as..
Producers
Consumers
Decomposers
They are all depend on each other.

7. Producers Are-
Organisms that make their own food through Photosynethesis (PLANTS)
Also called Autotrophs
Think Autobots (transformers) Autotrophs transform sun energy into chemical energy (sugar). They automatically make their own food

9. Producers in the Marine and Freshwater Ecosystems
Phytoplankton: tiny plant-like organisms found in fresh or marine waters.
SUPER important in these ecosystems!
Transform sunlight energy into food (chemical energy) and supply a HUGE amount of Oxygen to the world.

11. Consumers
Consumers need to eat (consume) their food to get energy. (ANIMALS)
Also called Heterotrophs

12. Types of consumers are There are THREE types of Consumers
Carnivores
Herbivores
Omnivores.
Its still all about what you eat!

13. Carnivores only eat meat (other animals)

15. Herbivores eat only plants.

17. Omnivores eat both meat (animals) and plants.

19. Decomposers
Decomposers eat dead things (detritus) and return nutrients back into dirt, or soil.
Saprotroph
Examples:
Mushrooms
Worms
Bugs
Bacteria

21. Stop…Review…Check… Turn to your partner and tell them the meaning of each word. Also give two examples of each.
Autotrophs:
Heterotrophs:
Saprotrophs:

22. How they relate .

23. FOOD WEB
Third-level
Consumers
Bobcat
Hawk
Arrows show direction of energy flow: from organism to consumer
Second-level
Consumers
Weasel
First-level
Consumers
Woodrat
Desert
Cottontail
Producers
Prickly Pear
Cactus
Mesquite

24. Energy Flow through an Ecosystem
Least amount of energy
Largest amount of energy

25. What happens to the other 90%?
Only 10% of an organisms energy is passed on to the next organism after consumption.
What happens to the other 90%?
Used by the animal
Lost as heat

26. Stop…Review…Check… Turn to your partner and explain the following
Primary vs Secondary consumer
What organisms hold/have the most energy in an ecosystem?
Why would it be necessary for upper level consumers to play multiple roles (i.e. be a primary and secondary consumer) in a food web?

27. Create a Energy Pyramid from the following Food chain
Label the Least and Most Energy
Label the Autotrophs and Heterotrophs
Label 1st, 2nd, and 3rd level consumers
Label herbivore, carnivore, or omnivore
Phytoplankton Mollusks (clams) Sea lion Shark

28. Heterotrophs
Energy
Heterotrophs
Autotrophs

29. Which organism is both a primary and secondary?