1 / 14

Energy Transfer Within Ecosystems

Energy Transfer Within Ecosystems. APES~Mr . Plowman. How do organisms grow? What determines the productivity of an ecosystem? Food chains, food webs, and trophic level pyramids. How Do Organisms Grow?. Photosynthesis builds biomass. Biomass : the dry weight of an organism.

hedy-hoover
Download Presentation

Energy Transfer Within Ecosystems

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. Energy Transfer Within Ecosystems APES~Mr. Plowman

  2. How do organisms grow? • What determines the productivity of an ecosystem? • Food chains, food webs, and trophic level pyramids

  3. How Do Organisms Grow?

  4. Photosynthesis builds biomass • Biomass: the dry weight of an organism. • No water weight

  5. Energy flow and nutrient cycling

  6. Primary Productivity • Gross Primary Production (GPP) • Rate at which an ecosystem’s producers convert solar energy into biomass. • Rate of photosynthesis • Net Primary Production (NPP) • NPP = GPP - R

  7. Primary Productivity

  8. Food Chains Tertiary Consumer Secondary Consumer Primary Consumer Primary Producer

  9. Food Webs

  10. Trophic Levels

  11. Energy transfer is inefficient

  12. Pyramid of Numbers • Shows the number of organisms at each trophic level in a food chain.

  13. Pyramids of Biomass

  14. Final Thought • If humans have a limited amount of land and resources, what do you think is more sustainable: • Eating plants • Eating animals

More Related