Science Struck
Science Struck: Food Chain in the Tundra Region
Describes the characteristics of a tundra biome, how a tundra food chain compares to a tropical food chain, and what the different trophic levels look like.
US Geological Survey
Lake Pontchartrain Basin Foundation: Ecosystems in Delicate Balance
Learning activities to investigate how organisms interact in a functioning ecosystem. Students will explore the role organisms play in food chains and preserving biodiversity in ecosystems. Lake Pontchartrain Basin ecosystem is featured...
Annenberg Foundation
Annenberg Learner: The Habitable Planet: Ecology Lab
Create the parameters of your own ecosystem by choosing which producers and consumers live there. Visualize how the food web operates and species populations change. This simulator mimics the food web within a typical ecosystem and gives...