1 / 13

Food Chains and Food Webs- Only one dimensional

Food Chains and Food Webs- Only one dimensional. Bobcat Third-level Consumer. Weasel Second-level Consumer. Prickly Pear Cactus Producer. Woodrat First-level Consumer. Energy Pyramid p.11. A grass plant uses most of the energy It obtains from the Sun for its own life

grazia
Download Presentation

Food Chains and Food Webs- Only one dimensional

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. Food Chains andFood Webs- Only one dimensional Bobcat Third-level Consumer Weasel Second-level Consumer Prickly Pear Cactus Producer Woodrat First-level Consumer

  2. Energy Pyramid p.11

  3. A grass plant uses most of the energy It obtains from the Sun for its own life Processes Some of the energy is stored in its tissues And left for prairie dogs and other animals That eat the grass Each prairie dog uses most of the energy It obtains from eating grass and stores only A little in its tissues

  4. Coyotes need even more energy than prairie dogs, so they must eat many prairie dogs to survive. There must be many more prairie dogs in the community than there are coyotes that eat the prairie dogs. The loss of energy at each level of the food chain can be represented by an energy pyramid

  5. You can see that the energy pyramid has a large base and becomes smaller at the top. The amount of available energy is reduced at higher levels because most of the energy is either used by the organism or given off as heat. Only energy stored in the tissues of an organism can be transferred to the next level

  6. What is happening to energy?

  7. Pyramid of numbers Pyramid of biomass Mass of 1 Owl = 5kg Mass of 5 voles = 10kg Mass of 1000 grass plants = 50kg Pyramid of biomass

  8. Pyramid of biomass Mass of 1 sparrowhawk = 5kg Mass of 5 bluetits = 10kg Mass of 1000 caterpillars = 20kg Mass of one tree = 1000kg Pyramid of biomass Pyramid of numbers

  9. Energy flow All energy comes from the sun As energy passes through the food chain some of it makes the biomass Some of it is lost through Respiration, heat, reproduction and faeces

  10. Energy Pyramid Organisms USE energy which means there is less available the higher up you go!

  11. Food Pyramid You should eat more of the things at the bottom than the top Less “good energy” as you go up the scale

  12. Please answer on your sheet of paper • Would it be “healthy” to eat by an inverted Food Pyramid? Why or Why not? • Would it be healthy for an ecosystem to have an inverted Energy Pyramid? Why or Why Not?

  13. Summary Questions Answer on a sheet of paper. • What does an energy pyramid represent? Why is it the pyramid shape? • Where does the energy of a food chain come from? • What happens to energy as it gets passed down a food chain? • Why can there only be around 4 levels in an energy pyramid? • What is one organism that’s important to a food chain that’s not shown on an energy pyramid?

More Related