Lesson 12: Equilibrium-Tipping the Scales


Has anyone been stopped on the highway to have their boat checked by a Conservation Officer in Alberta or BC? Why are they doing this?


Class Activities:

Videos: how biotic factors affect populations:




Interactions Among Organisms Activity

Exotic Species Video:


Prediction activity


Wrap Up:

Whirling Disease has been discovered in fish in Banff and the Bow River which eventually joins up with the Old Man River near Medicine Hat and flows into the South Saskatchewan River draining into the Hudson Bay. This disease can kill trout when infected.  There are several trout species, such as Bull Trout and Cutthroat Trout that are already at risk, due to other sensitivities. Parks Canada has decided to kill affected species in specific lakes in Banff National Park.


Wading in for Water © has been developed by SEEDS Connections™ with the support of:

Funders and Sponsors

  • RBC Foundation
  • The Calgary Foundation
  • Kamp Kiwanis
  • Cenovus Energy
  • Alliance Pipeline
  • TD Friends of the Enivornment Foundation
  • Rife Resources Ltd