This film explores the foundational research in the Serengeti National Park, Tanzania, that uncovered many of the ecological principles that govern how animal populations and communities are regulated.

In this video, ecologist Brian Silliman explains how he uses manipulative field experiments to study salt marsh ecosystems. His approach revealed that these systems are under top-down control from consumers and predators.

This video follows ecologist Mary Power, who is studying the Eel River in Northern California to decipher the connection between river flows and biodiversity.

In this talk, scientists Beth McGee, Mary Power, and Brian Silliman discuss the Chesapeake Bay, its food web, and the challenges of conserving and restoring the Bay.

In this talk, ecologist Mary Power discusses how herbivorous fish and their predators contribute to the regulation of aquatic ecosystems.

In this talk, ecologist Brian Silliman discusses the discovery that salt marshes are controlled by the top-down forces of consumers.

In this talk, ecologist Mary Power discusses how a river's community of herbivores and predators is affected by changes in river flow.

In this talk, ecologist Brian Silliman discusses the factors behind major die-offs of coastal wetlands.

This video follows scientists working in Bangladesh as they test fruit bat populations to determine whether they are infected with Nipah virus, a potentially deadly human pathogen.

This film tells the story of the ecologists who first documented the role of keystone species in ecosystem regulation.

In this discussion session, biologists Robert Pringle, Corina Tarnita, Alexandra Swanson, and Roland Kays answer questions from students.

This video follows scientists from Gorongosa National Park as they relocate zebras from a nearby reserve as part of the effort to restore healthy wildlife populations.