1.3 Food Webs

Goals

Recognize that consumers eat a variety of food sources for energy, many overlapping with other other consumers.

This linking together of food chains are called food webs.

Consumers must compete for food sources.Populations of species can change over

time.

How it really is

Animals must work to get energy from food.Sometimes prey may have different types of

predators.The predators must compete to get that

food.At the same time, those animals may have

multiple predators.These linking food chains are called food

webs.

Examples

Examples

Examples

Examples

Worst case scenarios

Food webs can change drastically if specific organisms are increased, decreased, or removed.

Organisms could be affected by diseases, natural disasters, human disasters, human involvement, and other reasons.

Let’s discuss the cane toad.

Australia’s sugar cane

Sugarcane toad

Eating habits

Greyback cane beetle