Food Webs

• Food chain: Linear series of feeding relationships.

• Food web: Shows the overlapping and interconnected food chains present in a community

Food Webs

Food Web Question

• Using the food web on page 147, what would lead to an increase in the amount of largemouth basses?

Food Web Question

• Using the food web on page 147, what would lead to an increase in the amount of largemouth basses?

1. An increase in number of killfish2. An increase in number of Flagfish3. An increase in number of grass shrimp and worms4. An increase in number of Everglades cray fish5. A decrease in alligators6. A decrease in anhingas

Food Web Sample Question

• Using the food web on page 147, list all the predators in the food web.

Keystone Species

•Species that have strong and/or wide-reaching effects on a community

•Removal of a keystone species can significantly alter the structure of a community.

Keystone Species

• http://www.youtube.com/watch?v=_IWw8Ruz8Uo

Producers, Consumers and the Energy Pyramid

• http://www.brainpop.com/science/diversityoflife/energypyramid/

TAKE NOTES in your notebook!!!

Producers (autotrophs)

• Organisms that create their own food.• Photosynthesis is the process by which producers

use energy from sunlight to convert water and carbon dioxide into sugar, releasing oxygen as a byproduct.

• Chemosynthesis is the process by which producers use hydrogen sulfide to convert CO2 and H2O to create sugar.

Photosynthesis

Producers examples

Consumers (heterotrophs)

• Organisms that eat other organisms.• Consumers undergo cellular respiration, which is

the process by which consumed sugars are broken down and releases CO2 and H2O as byproducts.

Herbivores = plant eaters