Trophic Webs

By Drs. Ingrid Waldron and Lori Spindler, Dept Biology, Univ Pennsylvania. CC-BY-NC 4.0.

Students analyze the production and utilization of organic molecules in ecosystems. Students construct a food web for Yellowstone National Park, including producers, primary consumers, secondary consumers, decomposers, and trophic omnivores. Then, students analyze a trophic cascade that resulted when wolves were re-introduced to Yellowstone.