Food Webs & The Carbon Cycle Thursday, May 20, 2010
All energy on Earth comes from the sun.
Thursday, May 20, 2010
All energy on Earth comes from the sun. Plants need light for photosynthesis. What else do they need?
Thursday, May 20, 2010
co
2
cross section of a leaf
Thursday, May 20, 2010
co
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• 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
Thursday, May 20, 2010
Thursday, May 20, 2010
In the food chain, plants are the producers. Thursday, May 20, 2010
Thursday, May 20, 2010
Consumers are animals that cannot make their own food. First level consumers feed on producers. They are herbivores or vegetarians. Thursday, May 20, 2010
Thursday, May 20, 2010
Second level consumers feed on first level consumers.
predators; the first level consumers they eat are called prey. Second level consumers are known as
Thursday, May 20, 2010
Thursday, May 20, 2010
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
Thursday, May 20, 2010
carnivores.
Thursday, May 20, 2010
Decomposers
break down waste products and dead organisms for food and release nutrients like carbon and nitrogen back into the soil. Thursday, May 20, 2010
Thursday, May 20, 2010
Scavengers and detritivores also feed on dead and decaying matter, but they leave plenty behind for the true decomposers to clean up.
Thursday, May 20, 2010
Energy flows through ecosystems from the sun, to producers, to consumers. 100
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0 Producer
Thursday, May 20, 2010
Herbivore
Carnivore 2째Carnivore
Energy flows through ecosystems from the sun, to producers, to consumers. • 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.
100
75
50
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0 Producer
Thursday, May 20, 2010
Herbivore
Carnivore 2°Carnivore
Thursday, May 20, 2010
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. Thursday, May 20, 2010
It takes 16
pounds of grain to make 1 pound of beef.
Thursday, May 20, 2010
Your dinner impacts our planet. Thursday, May 20, 2010
Food Web
Thursday, May 20, 2010
Food Web
Thursday, May 20, 2010
Land + water = crops Land + water + crops = livestock
Thursday, May 20, 2010
"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
Thursday, May 20, 2010
Thursday, May 20, 2010
What do you think?
Thursday, May 20, 2010