Food Web

By: Mrs. Hall

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Food Web

A tertiary consumer are carnivore (meat-eaters), at the topmost level in a food chain that feeds on other carnivores . A secondary consumer are animals that eat primary producers; they are also called herbivores (plant-eaters). A primary consumer are usually herbivores, feeding on plants and fungus. Plants are called producers. This is because they produce their own food! They do this by using light energy from the Sun, carbon dioxide from the air and water from the soil to produce food - in the form of glucose/sugar. Decomposer consumer (eat) dead plants and animal, reduces them to simple forms of matter.
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Mutualism (biology) Hummingbird drinking from Dianthus. Pollination is a classic example of mutualism. Mutualism is the way two organisms of different species exist in a relationship in which each individual benefits from the activity of the other.
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Commensalism is an association between two organisms in which one benefits and the other derives neither benefit nor harm.
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Parasitism is a relationship between two things in which one of them (the parasite) benefits from or lives off of the other, like fleas on your dog.

Human Affecting the Enviroment


  • Using chemical fertilizers, insecticides and herbicides to increase production actually pollutes the air, soil and water with toxic chemicals. Fertilizer run-offs cause toxic algal blooms that kill aquatic animals.

  • Removing trees and other plants to increase areas of cultivation causes habitat loss and threatens the survival of numerous species of animals and plants.


  • Grow seedlings in milk cartons or old socks.

  • Repurpose household items whenever you can.

  • Make sprouts in old cheese, butter, and yogurt tubs, or use them for storage.

  • Repurpose T-shirts into quilts and rugs.

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Hawk is a tertiary consumer.
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A mouse is an example of secondary consumer.