Entry Task: Lab Notebook 10/8/14

1. Entry Task: Lab Notebook 10/8/14 • Discuss the Food Web Game Analysis Questions worksheet with your group and turn in to the box – you have 5 minutes! • Bring your file folder from the file cabinet to your desk.

2. Trophic Pyramid Learning Target: I can determine which trophic level each organism occupies and explain why.

3. Great Salt Lake Food Web • Working with your table group… • Write the name of each GSL organism on a notecard (hint: Use your initial model) • Organize the organisms into a food web • Arrange the organisms by trophic levels

4. Trophic Levels • Trophic levels are what position you hold in the food web. • The levels are known as: • Producer • Primary consumer • Secondary consumer • Tertiary consumers • Decomposer.

5. Trophic Levels TURN & TALK: What trophic level do decomposers occupy? • Producer: don’t eat other things. They make their own energy by using sunlight. • Primary consumer: when they eat producers. • Secondary consumer: when they eat primary consumers. • Tertiary consumers: when they eat secondary consumers. • Decomposer: break down and eat any dead organism.

6. Trophic Levels • Producer: don’t eat other things. They make their own energy by using sunlight. • Primary consumer: 1°C =when they eat producers. • Secondary consumer: 2°C = when they eat primary consumers. • Tertiary consumers: 3°C = when they eat secondary consumers. • Decomposer: break down and eat any dead organism.

7. Trophic Pyramids • To organize a food web we make trophic pyramids. • All producers go on the bottom, primary consumers next, secondary consumers third and tertiary consumers on top of the pyramid.

8. Energy in Trophic Pyramids TURN & TALK: If you eat a burger, are you giving the burger energy or is the burger giving you energy? So which direction would energy move in a trophic pyramid? Up or down? • Energy moves up the trophic levels because the upper levels are eating the lower levels and using them for energy.

9. Energy in Trophic Pyramids • Energy gets lost at each level due to: • Energy getting transformed into other energy inside the consumer. • Not all of the food is eaten up. • Waste (feces, urine, respiration)

10. Biomass in Trophic Pyramids • Because energy is always moving up the trophic levels there has to be more, in numbers, of the lower levels. • Due to space available the lower levels have to be smaller in size and the upper levels get bigger and bigger.

11. Biodiversity of the Lake • Cyanobacteria is a bacteria. It doesn’t eat because it makes it’s own energy from the sun. • Diatoms are algae. They also make their own energy from the sun. • Halobacteria are Archaea. They also make their own energy from the sun.

12. Biodiversity of the Lake • Many organisms live in or near the lake. • Northern Harrier is a bird. • It eats the Avocet, another bird. • Avocets eat Brine shrimp and Brine fly. • Eared Grebe also eats Brine fly. • Brine fly eats Cyanobacteria and Diatoms. • Brine shrimp also eats Cyanobacteria, Diatoms and it’s the only one that eats Halobacteria.

13. Great Salt Lake Trophic Pyramid Tertiary Consumers Northern Harrier Secondary Consumers Avocet Eared Grebe Primary Consumers Brine Shrimp Brine Fly Producers Halobacteria Cyanobacteria Diatoms

14. Vocabulary Words Turn to your vocabulary section of your journal and add these words. Trophic Levels The position an organism holds in a food web. (Producers, Primary Consumers, Secondary Consumers, Tertiary Consumers, Decomposers) Halo- Greek root word that means “salt”