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Trophic Cascades in Rivers

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Topic
  • Ecology
  • Communities
  • Ecosystems
  • Science Practices
  • Experimental Design
Duration
44 minutes 27 seconds
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Description

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

The ecosystem of a river depends on interactions between primary producers, grazers, and predators. These interactions, in turn, are determined by the traits of the species involved and the physical conditions of the river. Power illustrates these principles by describing how species of grazing fish play a critical role in shaping the aquascape of river ecosystems.

This talk is from a 2016 Holiday Lecture Series, Ecology of Rivers and Coasts: Food Webs and Human Impacts.

Details
Key Terms

algae, biomass, catfish, food web, grazer, pool, top-down control, trophic level, trophic pyramid

Terms of Use

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Version History
Date Published 10.13.16
Date Updated 04.03.17
Materials
Video (MP4) 371 MB
Transcript (PDF) 334 KB
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