1 / 32

U11: Energy Flow

U11: Energy Flow. E CDCICA. What’s for Lunch?. Black Bear. Raccoon. What’s for Lunch?. Ruffed Grouse. Hawk. Trophic Level.

mardi
Télécharger la présentation

U11: Energy Flow

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. U11: Energy Flow ECDCICA

  2. What’s for Lunch? • Black Bear • Raccoon

  3. What’s for Lunch? • Ruffed Grouse • Hawk

  4. Trophic Level • Ecosystems are structured by who eats whom. A trophic levelis the position that an organism occupies in a food chain- what it eats and what eats it. Every organism belongs to at least one feeding level or tropic level.

  5. Energy Pyramid • A graphical representation to show the relationship between energy and the trophic levels of a given system is an Energy Pyramid.

  6. Law of Thermodynamics • As chemical energy flows through an ecosystem heat energy is lost at each trophic level. Only 10% of the chemical energy transfers and 90% is lost as heat energy. • This heat energy loss is displayed in the Energy Pyramid.

  7. Law of Thermodynamics

  8. Law of Thermodynamics

  9. Trophic Level • Producers make their own food through photosynthesis or chemosynthesis • Examples: grass, fern, cactus, flowering plant, tree, algae, some bacteria

  10. Trophic Level • Consumers get their energy by eating producers or other consumers. • Examples: mouse, starfish, turtle, paramecium, sponge, ant, human

  11. Trophic Level • Decomposers break down dead organisms in an ecosystem and return the nutrients to soil, water and air. Converts bond energy from dead and decaying organisms into heat. Examples: fungus, bacteria

  12. What can make their own food? Producers! Autotroph auto means self trophmeans nourish • An organism that produces, or makes their own food. Autotrophs are also called producers.

  13. Cannot make their own food • Heterotroph hetero means other trophmeans nourish • An organism that obtains its energy by the consumption of or decaying of other organisms. • Heterotrophs are also called consumers (consumption) or decomposers (decaying).

  14. Types of organismsA. Consumers in an ecosystem • Primary Consumer – The first consumer in a food chain/ food web and consumes a producer. • Herbivores or plant eater

  15. Secondary Consumer – The second consumer in a food chain/food web.

  16. Tertiary Consumer – The third consumer in a food chain/food web.

  17. What it eats – niche in the food web • Herbivore – An organism that eats plants, nuts, berries ie. rabbit, deer • Omnivore – An organism that eats plants and animals ie. black bear, human • Carnivore – An organism that eats animals ie. wolf, hawk, whale • Scavenger – An organism that feeds off of dead animals that they did not hunt or kill themselves. ie. vulture

  18. Where are the Omnivores?

  19. Predator vs Prey • Predator – An organism that feeds on what it hunts and kills ie. coyote • Prey – An organism that is hunted and killed for food ie: mouse • Is a producer prey? ______ • Can an organism be both prey and predator? ___

  20. Food Chain – A pathway in which energy flows through an ecosystem.

  21. Food Web – All possible pathways in which energy flows through an ecosystem.

  22. Energy flow… how it begins • Photosynthesis – Conversion of sun’s energy to chemical energy (food). Performed by producers. 6CO2 + 12H2O + Sunlight energy  C6H12O6 + 6O2 +6H20 (C6H12O6 = glucose, food energy, chemical energy, potential energy - in bonds) 

  23. Cellular Respiration – Process by which chemical energy (food) is converted to usable energy. Performed by producers, consumers and decomposers! • C6H12O6 + 6O2 + 2ATP  6CO2 + 6H2O + 38ATP (usable energy for cells)

  24. ________________________

  25. _________________________

  26. _________________ Water is released

  27. ___________________________ 2 ATP

  28. Energy Flow

  29. Energy in a Pond Circle the Autotrophs and draw a rectangle around the Heterotrophs Draw an arrow to all organisms that would be an energy source for decomposers Label PH – for all organisms that perform Photosynthesis Label CR – for all organisms that perform Cellular Respiration Label 1E – for the primary energy source in this ecosystem Label 1C - primary consumers, Label 2C – secondary consumers & Label 3C- tertiary consumers List abiotic factors in pond __________________________________________________

  30. Energy Flow - Label in the diagram: chemical energy transfer (10%) or heat energy loss (90%)

More Related