DISCUSSION: How Wolves Change Rivers

Answer the questions below. A minimum of 5 sentences is expected for your initial response.

  • What were three effects of wolves being absent?
  • What were three effects of wolves being present?
  • What caused the rivers to change?
  • Why is this situation considered a trophic cascade?
  • What makes wolves the keystone species in this situation?
  • Research another keystone species in a different ecosystem. Describe how a trophic cascade in this new ecosystem might occur. 
Citations should be in APA format. Sources should be reliable and non-biased.

watch-  https://www.youtube.com/watch?v=ysa5OBhXz-Q (Links to an external site.)