| AMAZON FOOD WEBS | ||||
http://www.animalsoftherainforest.org/frames1.htm |
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| Food Chains: The food chain is when a really small insect or animal eats a plant or insect and then a bigger animal eat him and a bigger animal eats him and so on and so on example if a mouse eats a plant the energy transvers from the plant to the mouse and then a snake eats the mouse the energy goes from the mouse to the snake and then after that the hawk will eat the snake and the energy from the snake travels to the hawk. | ||||
| Food Webs: | ||||
| All living things require
energy to carry out their life activities. It is
needed for various chemical reactions that occur
in cells, movement, transporting certain
molecules across the cell membrane. Without a
constant input of energy, an organism will die.
Food is the source of energy for living things.
It is produced in autotrophs and flows among the
organisms in an ecosystem. The main source of
energy in an ecosystem is the sun. The sun's
energy is capture by producers during
photosynthesis. We can think of the sun's energy
being trapped in the bonds of sugar molecules.
Energy flows between organisms when one organism
eats another. A food chain is a model that shows
how matter and energy move through an ecosystem.
Food chains start with a producer, proceed to
consumers and finally to decomposers. Both
nutrients and energy are passed from one level to
the next. The various feeding levels in a food
chain are called trophic levels. In a field grass
is eaten by mice that are eaten by owls. This
represents a food chain with 3 trophic levels. grass ---->mouse-----> owl TROPHIC LEVELS: 1st producers 2nd primary consumer herbivore 3rd secondary consumer carnivore that eats a herbivore 4th tertiary consumer carnivore that eats a carnivore In the example above: 1st grass 2nd mouse 3rd owl
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| The Delicate Balance of Organisms: | ||||
http://www.si.edu/sites/educate/troprain/foodchai.htm