FOOD CHAINS AND WEBS!.

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Food Chains and Food Webs

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Presentation transcript:

FOOD CHAINS AND WEBS!

What is a Food Chain? A food chain is the path by which energy passes from one living thing to another.

Producers (Autotrophs) Prodcers make their own food using PHOTOSYNTHESIS

Consumers (Heterotrophs) Consumers hunt, gather, and store food because they cannot make their own.

Four Types of Consumers Herbivores (plant eaters) Rabbits, squirrels, some birds, most insects Carnivores (Meat eaters) Wolves, predatory cats, hawks, eagles Omnivores (both plants and meat) Humans, bears Scavengers (eat dead things) Vultures

Decomposers Microorganisms that are able to break down large molecules into smaller parts Decomposers return the nutrients that are in a living thing to the soil Examples

Terrestrial Food Chain

Aquatic food chain

What is a Food Web? A more realistic way of looking at the relationship of plants and animals in an environment Several food chains linked together

http://www. mrpdarling http://www.mrpdarling.com/wp-content/uploads/2012/09/BorealForestFoodWebPic.jpg

Food Webs How many food chains can you make from this food web?

1. Which organisms are the producers? _________________ _________________ 2. Identify the consumers... C – Carnivore O – Omnivore H – Herbivore P - Planktivore Food Web Graphic - http://staff.harrisonburg.k12.va.us/~gharper/bay/weboflifepage/foodweb.jpg

#3 What would happen if the mussels were to die out due to a disease? How would the zooplankton be affected if the fish population were to increase? How would the whelk population be affected if crabs were removed?