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Published byAdela Stevenson Modified over 8 years ago
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Food Chains & Webs
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Producers Organisms that make their own food by the process of photosynthesis Also referred to as autotrophs (self-feeders) Are found in the first feeding or trophic level in food chains Ex. Plants, algae Producers use 50% of the energy they capture to live, the other 50% gets stored inside of them to feed consumers
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Consumers Organisms that cannot make their own food Also referred to as heterotrophs There are 4 main classifications for consumers: 1. Herbivores: only feed on producers Also called primary consumers found in second trophic level Examples; deer, moose, rabbits 2. Carnivores: feed on herbivores or other carnivores Meat eaters
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Consumers Continued… Two types of carnivores: A) Secondary Consumers – carnivores that feed on herbivores Found in third trophic level Example, a lion eating a gazelle B) Tertiary Consumers – carnivores that feed on other carnivores Found in fourth trophic level Example, a coyote eating a raccoon.
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Consumers Continued… 3. Omnivores: feed on producers, herbivores & carnivores Eat anything Depending on what they consumer they can be classified as primary consumers (second trophic level), secondary consumers (third trophic level), or tertiary consumers (fourth trophic level) 4. Decomposers: break down dead plants & animals and release nutrients back into the soil and water Found in ALL trophic levels Examples, fungi, worms, bacteria, crabs, beetles, etc.
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Food Webs A combination of more than one food chain Food webs are much more complex than food chains
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Your Assignment In groups of 4 using flip chart paper, markers, and /or pencil crayons design a food web to represent the list of organisms your group is given. Draw and label each organism. As you make your food web label each organism as either a producer, consumer or decomposer. If it’s a consumer indicate whether it’s a: primary, secondary, or tertiary consumer and if it’s a: herbivore, carnivore, or omnivore. I will be displaying them!
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Group 1 – mouse, corn, bluebird, king snake, hawk, cat, cricket, wild flower, black berries, frog Group 2 – cherry tree, fox, snake, hawk, rabbit, squirrel, butterfly, frog, bluebird, worms Group 3 – Pine tree, wild flower, bacteria, bobcat, grasshoppers, badger, raccoon, rat, fox, mountain lion Group 4 – mosquitoes, deer, skunk, spider, termites, ants, bird, vulture, fox, grass/trees Group 5 – shark, sea turtle, sea weed, worm, phytoplankton, algae, human, barracuda, butterfly fish, lobster Group 6 – bear, wild blue berries, bob cat, ground hog, raccoon, birch tree, toad, deer, snake, rabbit Group 7 – maggots, mouse, green clover, human, bob cat, deer, mosquitos, corn, apple tree, dead owl
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