Increases in UV rays will harm young marine life, such as floating fish eggs, fish larvae, juvenile fish, and shrimp larvae. Inability to properly position themselves in the water column dramatically inhibits their ability to photosynthesize. Phytoplankton are called primary producers because they photosynthesize their food from sunlight. Explore Find out what will survive UV-B radiation in Antarctica.
Procedure Make cards for each item in the food web.
Assign students to various items. Give one end of the string to the student who is phytoplankton. Have the class discuss and decide what element eats what. Pass the free end of the string along, up the food chain to the larger predators. Have students let go of the food web string as they no longer have any food to eat, and have the higher creatures pull in the free end.