Download - Food Webs and the Carbon Cycle
Food Webs & The Carbon Cycle
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All energy on Earth comes from the sun.
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Plants need light for photosynthesis.
What else do they need?
All energy on Earth comes from the sun.
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co2
cross section of a leaf
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co2
• During photosynthesis, plants take in carbon dioxide and
sunlight to create fuel-- glucose and other sugars-- they store as cellulose and starch.
• This process forms the
foundation of the biological carbon cycle.
cross section of a leaf
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In the food chain, plants are the producers.
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Consumers are animals that cannot make their own food.
First level consumers feed on producers.
They are herbivores or vegetarians.
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Second level consumers feed on first level consumers.
Second level consumers are known as predators;
the first level consumers they eat are called prey.
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Third level consumers feed on second level consumers.
Consumers that eat both plants (producers) and animals (other consumers)
are called omnivores.
Consumers that eat only animals (other
consumers) are called carnivores.
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Decomposers break down waste products and dead organisms for food and release nutrients like carbon and nitrogen back into the soil.
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Scavengers and detritivores also feed on dead and decaying matter, but they leave plenty behind for the true decomposers to clean up.
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Energy flows through ecosystems from the sun, to producers, to consumers.
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Producer Herbivore Carnivore 2°Carnivore
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• Only 10% of the energy stored in an organism gets transferred from one trophic level (from producer to 1°consumer to 2°consumer etc...) to the next.
• Producing animal-based food is much less efficient than the harvesting of grains, vegetables, legumes, seeds and fruits.
Energy flows through ecosystems from the sun, to producers, to consumers.
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Producer Herbivore Carnivore 2°Carnivore
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Nearly 1/2 of the total amount of water used annually in the U.S. goes to feed and provide
drinking water for cattle and livestock.
It takes 16 pounds of grain to
make 1 pound of beef.
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Your dinner impacts our planet.Thursday, May 20, 2010
Food Web
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Food WebLand + water = cropsLand + water + crops = livestock
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"Nothing will benefit human health and increase the chances of survival of life on earth as much as the evolution to a vegetarian diet."- Albert Einstein
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Thursday, May 20, 2010
What do you think?
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