Food Chains and Food Webs - PowerPoint PPT Presentation

food chains and food webs n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Food Chains and Food Webs PowerPoint Presentation
Download Presentation
Food Chains and Food Webs

play fullscreen
1 / 13
Food Chains and Food Webs
135 Views
Download Presentation
kalonice
Download Presentation

Food Chains and Food Webs

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Food Chains and Food Webs

  2. Autotrophs • Autotrophs are producers - Organisms that use energy from the sun to manufacture their own nutrients

  3. Heterotrophs • Heterotrophs are consumers – Organisms that cannot manufacture their own food and must feed on other organisms

  4. 1st Order Heterotrophs • Feed directly on autotrophs • Also known as herbivores

  5. 2nd Order Heterotrophs • Feed on first-order heterotrophs • They are carnivores

  6. 3rd Order Heterotrophs • Carnivores that feed on 2nd order heterotrophs

  7. Scavengers • Scavengers – feed on carrion and refuse

  8. Decomposers • Decomposers – organisms that break down complex molecules of dead and decaying plants and animals

  9. Omnivores • Omnivores – feed on both plants and animals

  10. Food Chains • A simple model that shows how matter and energy can move through an ecosystem. • Each organism in a food chain represents a feeding step called a trophic level.

  11. Food Chains

  12. Food Webs • A food web expresses all of the possible feeding relationships between individuals in a community.

  13. Food Web