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EnergyEnergy FlowFlow inin EcosystemsEcosystemsMr. SchumaierMr. Schumaier
What energy roles do organisms play in an
ecosystem?
Organism's play one of three roles:
ProducerConsumer
Decomposer
What is a PRODUCER?
An organism that can make its own food such as grass and
trees.
What is a CONSUMER?
An organism that gets its energy by feeding on other
organisms
Describe HERBIVORES, CARNIVORES, OMNIVORES, &
SCAVENGERS.
H e r b iv o r e s
Eat only plants such as caterpillars, cattle, and deer.
C a r n iv o r e s
Eats only animals such as lions, spiders, and snakes.
O m n iv o r e
Eats both plants and animals such as Crows, goats, and most humans.
S c a v e n g e r
A carnivore that eats the bodies of dead organisms such at catfish and
vultures.
What do herbivores and carnivores have in common?
Herbivores and carnivores are similar in that both are
consumers; they cannot make their own food but must obtain
food by eating other organisms.
What are DECOMPOSERS?
An organism that breaks down wastes and dead organisms and
returns raw material to the environment
Bacteria, fungi, molds, mushrooms
What is the FOOD CHAIN?
A series of events in which one organism eat another and
obtains energy.
What is a FOOD WEB?
Many overlapping food chains in an ecosystem.
What can be shown through the use of food chain and food
web diagrams?
Food Chain shows one possible path that energy
moves through an ecosystem.
Food web is a more realistic way to show the flow of energy
through an ecosystem
What is an ENERGY PYRAMID?
A diagram that shows the amount of energy that moves
from one feeding level to another in a food web.
How much energy is available at each level of an energy
pyramid?
Third-level consumers = 1kcal
Second-level consumers = 10 kcal
First-level consumers = 100 kcal
Producers = 1,000 kcal
The most energy is available at the producer level. At each level in the
pyramid, there is less available energy than at the previous level.
Why are food webs a more realistic way of portraying
ecosystems than food chains?
Most producers and consumers are part of many
overlapping food chains.
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