1. Relationships within Ecosystems

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

3. ECOSYSTEM
Abiotic (non-living)
Biotic (living)

4. Levels of Ecosystems Individual – one organism
Population – group of same species
Community – all the populations living in same area
Habitat – where a population lives in an ecosystem

5. 2 Major Ecosystems Terrestrial (Land) Aquatic (Water)
Biomes (Tundra, Desert, Rainforest)
Aquatic (Water)
Freshwater (ponds, streams, lakes)
Marine (oceans, gulfs, seas)

6. ENERGY Flows through an Ecosystem!
Energy flow shown through a food chain.
Arrows show how energy flows from 1 organism to next.
algae
small fish
large fish
osprey

7. Food Web A model that shows many feeding relationships in an Ecosystem
Made of many food chains

8. 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

9. Producers Form the base of the food web AKA: Autotrophs
Make food by using energy from surroundings, mostly the sun
Plants – through photosynthesis

10. Producers in Aquatic Ecosystems
Phytoplankton: tiny plant-like organisms found in fresh or marine waters.
SUPER important in these ecosystems!
Through photosynthesis, supplies a HUGE amount of oxygen to the world!

11. Consumers Get energy by eating other organisms AKA: Heterotrophs
3 Types
Herbivore – eats plants
Omnivore – eats plants and animals
Carnivore – eats animals

12. Carnivores only eat meat (other animals)

14. Herbivores eat only plants.

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

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

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

21. How they relate .

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