The largest concentration of free-roaming wildlife in the continental United States is found in Yellowstone National Park. A video describes the three main types of population interactions: mutualism, commensalism, and parasitism. It describes examples from Yellowstone National Park and the human impact on ecosystems. 

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CCSS: Adaptable
Instructional Ideas

  • Use an ecosystem near you and create a list of interactions between various organisms
Classroom Considerations

  • Remember comments are open to the public on YouTube
  • Requires prior knowledge of populations, communities, and ecosystems
  • Video is the 17th in an 18-part series

  • Provides a review worksheet
  • Includes closed captioning to help with understanding
  • Uses high-quality photographs and diagrams

  • None
Common Core