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Understand how organisms obtain energy and interact within ecosystems, identifying producers, consumers, and decomposers. Learn about various food chains and webs in different environments.
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FOOD CHAINS & WEBS Middle School Science Dr. Kutscher INSTRUCTIONAL POWER POINT
ALL LIVING THINGS NEED ENERGY • In an ecosystem, an organisms’ role depends on: • How it obtains energy & • How it interacts with the other living things in the ecosystem • Organism’s energy role is: • Producer • Consumer • Decomposer
It all begins withplants that make their own food….. IntroducingPRODUCERS
CONSUMERS CAN BE… • Herbivores • eat plants • Carnivores • eat animals • Omnivores • Eatplantsand animals
DECOMPOSERS ARE NATURE’S RECYCLERS • BACTERIA • FUNGI • SOME ANIMALS
ECOSYSTEMS DEPEND ON THE BALANCE OF THEIR FOOD WEBS • The loss of one organism may tip the delicate balance of survival for many other organisms within that ecosystem.
EXPLAIN THE SAMPLE FOOD CHAINS & WEBS THAT FOLLOW: • Which is the PRODUCER? • First level CONSUMERS? • Second level CONSUMERS? • Third level CONSUMERS? • DECOMPOSER?
Decidous Forest Food Chain
DECIDUOUS FOREST FOOD WEBThe arrows connect the prey (diet) to the predator (consumer). The colored dots on the animals are coded to the colors in the triangular diagram at the upper right.
FOOD WEB Deciduous Forest
Coniferous Forest Food Web
