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Peace River Valley

Peace River Valley. Science 10 Ecosystem processes and relationships. Learning Outcomes. By the end of this seminar and related readings, you should be able to : Locate the Peace River area’s biome and ecozone . Understand food relationships, nutrient cycles and bioaccumulation processes.

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Peace River Valley

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  1. Peace River Valley Science 10 Ecosystem processes and relationships

  2. Learning Outcomes • By the end of this seminar and related readings, you should be able to : • Locate the Peace River area’s biome and ecozone. • Understand food relationships, nutrient cycles and bioaccumulation processes. • Recognize some plants, animals, fish, birds, amphibians, and reptiles that inhabit the Peace River Valley. • Explore relationships between living elements of the Peace River Valley. • Demonstrate comprehension of processes with applied examples from the Peace River Valley. • Propose a bioaccumulation scenario using knowledge of cycles and local species.

  3. Biomes& Ecozones Where are we?

  4. About the Peace River Valley

  5. In our backyard

  6. Breaks, islands and plateaux

  7. Home to many people

  8. Agriculture and recreation

  9. Living Things

  10. Living Things Try to identify all the plants, animals, birds, fish,amphibians and reptiles on your cards. All of these species are found in the Peace River Valley. Write the correct species names on the cards.

  11. Abiotic and Biotic Theory

  12. Biotic: relating to living things What can you see in this picture?

  13. Biotic: relating to living things What can you see in this picture?

  14. Abiotic: non-living chemical and physical factors What can you see in this picture?

  15. Abiotic: non-living chemical and physical factors What can you see in this picture?

  16. Food FlowNutrient Cycle Theory

  17. Predator / Prey Relationship

  18. Food Chain

  19. Food Pyramid

  20. Food Web

  21. Nutrient cycle

  22. Food FlowNutrient Cycle Practice! On your handouts Food Chain Food Pyramid Food Web Nutrient Cycle

  23. Bioaccumulation Theory

  24. Bioaccumulation • refers to the gradual buildup of chemicals in living organisms. • Many harmful chemicals cannot be decomposed naturally. • These chemicals can be eaten or absorbed and sometimes cannot be removed from the body of the organism effectively.

  25. Biomagnification • is the process by which chemicals become more concentrated at each trophic level. • At each level of the food pyramid, chemicals that do not get broken down build up in organisms. • When a consumer in the next trophic level eats organisms with a chemical accumulation, it receives a huge dose of the chemical(s).

  26. Example: Mercury • Enters ecosystems through the burning of fossil fuels, waste incineration, mining, and manufacturing (ie: batteries) • Mercury bioaccumulates in the brain, heart and kidneys of many animals and fish. • Elevated mercury levels in fish tissue is a common side-effect of flooding to create hydroelectric dam reservoirs. (Stokes & Wren, 1987)

  27. Bioaccumulation Practice! On your handouts Which species would be effected by increased mercury levelsin the Peace River, due to an additional hydroelectric dam?

  28. Discussion points • What biotic elements would be affected by increased mercury levels in the Peace river? • What trophic levels would be most impacted by mercury contamination of the Peace River? • What are the possible impacts of your scenario, on the natural ecosystem, and on humans that interact with it?

  29. Learn more If you were interested in our topics today, you can learn more by reading • Bioaccumulation of Mercury by Aquatic Biota in Hydroelectric Reservoirs • The Living Peace River Valley Both are found on www.itsourvalley.ca

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