Curated OER
AP: Chapter 54: Ecosystems
A lot of learning is packed into these 23 questions about ecosystems. Advanced biology classes apply their knowledge of communities, productivity, biogeochemical cycles, and human impact on the environment by writing short answers for...
OpenStax
Open Stax: Energy Flow Through Ecosystems
Understand how organisms acquire energy and how that energy is passed from one organism to another through food webs and their constituent food chains.
Other
Marietta College: Ecosystems
Complete illustrated discussion of energy flow within ecosystems, including discussions of trophic levels, ecological pyramids, food chains and webs, biological magnification, and cycles.
McGraw Hill
Glencoe Biology: Threats to Biodiversity: Self Check Quiz
Try these five self-checking quiz questions over the threats to the loss of biodiversity on Earth.