Scholastic
Scholastic: Endangered Ecosystems: Build a Food Web
Investigate some animals and see where they are in the food web. Build your own food web and relate it to the endangered species biomes.
Other
The Ecosystems Center
A resource with educational information on ecosystems, as well as programs that focus on environmental research and education.
US Geological Survey
Usgs: Desert Ecosystems
What elements are present in a desert ecosystem? What impact might humans have upon it? Learn more about the processes that affect desert ecosystems by visiting this site. Contains only one large illustration.