Lesson 04 ­ Energy Flow in Food chains and 10% rule filled in.notebook
May 03, 2013
Energy Flow in Food Chains and Food Webs
SUN
The main starting source of energy for any ecosystem is the _________. The PLANTS
SUN'S
__________ energy is absorbed by ______________ and is converted into a FOOD
chemical energy we call ___________. The name of this process is called PHOTOSYNTHESIS
______________________. As a herbivore eats a plant, the _____________ from the __________is passed on ENERGY
PLANT
HERBIVORE
to the __________________. All food chains start with a PRODUCER (PLANT)
FOOD CHAIN
__________________________. This __________ __________ has only ______ TWO
trophic levels. CARNIVORE
HERBIVORE
If a _____________ then eats the _____________, the energy from the HERBIVORE
____________________is passed on to the carnivore. This food chain would now have _______ trophic levels.
THREE
Match the following food chain terms with the correct definition
Carnivore
eats meat
Food Web
a community of organisms where there are several connected food chains Trophic Level a particular position occupied by a group of organisms in a food chain Consumer
needs to eat other organisms to get energy
Decomposer
any organism that eats decaying organic matter Herbivore
eats plants only
Producer
is able to make its own food through photosynthesis Food Chain
a community of organisms where each member is eaten in turn by another member Omnivore
eats both meat and plants
Example of a food chain.
1
Lesson 04 ­ Energy Flow in Food chains and 10% rule filled in.notebook
May 03, 2013
Example of a biodiverse Food Web
1) Why is this food web considered biodiverse?
2) Why is a biodiverse food web create a more sustainable ecosystem? (think of how it benefits the fox).
3) If there were no rabbits, squirrels, mice, or seed­eating birds, how could this make the ecosystem unsustainable? Energy Flow and the 10% rule
Most of the energy that enters a trophic level is used by the organism to ______________ ______________. • _______ of the energy is lost to waste, movement, warmth and metabolism.
• ________ __________ of the energy consumed by an animal is retained in the body tissues and is available for the next trophic level. Ten Percent Rule ­ only _______________ of the energy an animal _______ is passed on to the _____________ trophic level. 2