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Trophic Cascades in Salt Marsh Ecosystems

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.

Ecology, Food Webs, and the Chesapeake Bay

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.

Trophic Cascades in Rivers

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

Untangling Salt Marsh Food Webs

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

Floods, Droughts, and Food Chains

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

The Great Elephant Census

This video follows the work of scientists conducting the first census of African savanna elephants in over 40 years and the methods they are using to obtain accurate, up-to-date numbers across the continent.

Niche Partitioning

This video introduces the concept of niche partitioning with examples drawn from the African savanna.

Metabarcoding

This video describes the technology of metabarcoding, which allows scientists to determine herbivore diets based on the sequences of plant DNA extracted from animal dung.