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Feeding Relationships

Producer



Autotrophs – make their own
food
Convert solar energy into
chemical energy
Examples: Plants (terrestrial),
algae and phytoplankton
(aquatic)
http://www.chlorella-therapy.com/en/images/agaricus/p01/pict_02.gif
Feeding Relationships

Consumer

Heterotroph – gets food from their
environment

Herbivores – eat plants
http://www.qrg.northwestern.edu/projects/marssim/simhtml/pics-for-sim/moose.jpg

Carnivores – eat meat

Omnivores – eat plants and meat

Detrivores – feed on remains of organisms

Decomposers – break down organic matter
http://www.eoearth.org/images/191655/500x0/scale/grizzly_alaska_fr.jpg

Examples: Animals, and some bacteria
and protists.
fireflyafrica.blogspot.com
Trophic Levels


Each link in a food
chain is known as a
trophic level.
Arrows show the
flow of energy and
go from prey to
predator
Trophic Levels
Food web:
a. shows all possible feeding
relationships in a
community at each trophic
level.
b. represents a network of
interconnected food
chains.
http://library.thinkquest.org/J0113170/forest/images/foodweb.jpg
Look at the crickets.
What do they eat?
Look at the Birds.
What do they eat?
Trophic Levels




Ecological Pyramid:
show mass and energy at
each trophic level
Biomass: the amount of
organic matter comprising
a group of organisms in a
habitat.
As you move up a food
chain, both available
energy and biomass
decrease.
Only 10% of the energy
goes from one level to the
next.
http://2.bp.blogspot.com/-DrCjIUt1Cf8/TgV6AwF4QnI/AAAAAAAAADk/83PL8UPrXZ0/s1600/EnergyPyramid.gif