Transcript Food Web - Crater-lake

Food Web
Of Crater Lake
Black Bear
Coyote
Golden-mantled
Ground Squirrel
Mountain Lion
Deer Mouse
Roosevelt Elk
Bobcat
Third
first
Mule Deer
Red-tailed hawk
Second
Clark's nutcraker
cyano bacteria
Decomposer
Ponderosa Pine
Lodgepole Pine
Sugar Pine
Grass
producer
The ten percent rule is a
description of how producer
biomass is carried on to the
next level. In our project
the producers energy is split
into the first level
consumers from the grass
and roots of the trees to the
first level. The black bear
though is an exception as
he eats the shoots from the
pine trees gaining more
than 10%.
10% Rule
Third level
0.1%
Second level 1%
First level 10%
Producer
100%