6. DECOMPOSERS PRODUCERS PRIMARY CONSUMERS SECONDARY CONSUMERS THIRD-LEVEL CONSUMERS Planktonic algae Benthic algae Brine Shrimp Brine fly Red-necked phalarope Wilson’s phalarope Eared grebe Caspian tern Snowy plover Coyote California gull

11. DECOMPOSERS PRODUCERS PRIMARY CONSUMERS SECONDARY CONSUMERS THIRD-LEVEL CONSUMERS Planktonic algae Benthic algae Brine Shrimp Brine fly Red-necked phalarope Wilson’s phalarope Eared grebe Caspian tern Snowy plover Coyote California gull

12. DECOMPOSERS

14. Is all the food energy consumed by a primary consumer transferred to the secondary consumer when it is eaten?

16. Based on the 10% rule, could you have an ecosystem in which there lived 100 kg of algae, 100 kg of brine shrimp, and 100 kg of California gulls?