Energy Flow Through an Ecosystem

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Energy Flow Through an Ecosystem

• Food Chains, Food Webs, Energy Pyramids

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Photosynthesis Chemical reaction where green
plants use water carbon dioxide to store the
suns energy as glucose
6CO2 6H2O ?C6H12O6 6O2
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Organisms that can make glucose during
photosynthesis are called PRODUCERS or AUTOTROPHS.
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The energy that is not used by producers can be
passed on to organisms that cannot make their own
energy.
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Organisms that cannot make their own energy are
called CONSUMERS or HETEROTROPHS.
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The chemical reaction that releases the energy in
glucose.
CELLULAR RESPIRATION
6O2 C6H12O6 --gt  6H2O 6CO2
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Consumers that eat producers
herbivores plant eaters
first order (1st) or primary consumers
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Consumers that Eat other Consumers

• Secondary or 2nd order consumer
• May be a carnivore or omnivore
• May be a predator
• May be a scavenger

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Consumer that eat consumers that already ate a
consumer

• Tertiary or 3rd order consumer
• May be a carnivore or omnivore
• May be a predator
• May be a scavenger

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These levels of organization are called TROPHIC
Levels
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Producers collect energyfrom the sun and store
as starch Most of the energy the primary
consumer gets from the producer is used by
the consumer
Where does the energy go?
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Some of the energy moves into the atmosphere as
heat.
Some energy in the primary consumer is STORED or
used by the consumer itselfThis energy is
available for another consumer
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Secondary consumer gets energy from the primary
consumer, most is used
Where does the energy go?
Some of the energy is lost as heat Some energy
is stored and can passed on to another consumer.
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The transfer of energy from the sun to producer
to primary consumer then to higher order
consumers can be shown in a FOOD CHAIN.
Where does the energy go?
The arrow shows the direction of transfer of
energy
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Food Chains Show Available Energy
Only 10 of available energy is passed to next
trophic level
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Energy Pyramids
Amount of available energy decreases for higher
consumers It takes a large number of producers
to support a small number of primary
consumers It takes a large number of
primary consumers to support a small number
of secondary consumers
E n e r g y L o s s
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More Food Chains
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Food Webs

• Are interconnected food chains
• They show the feeding relationships in an
  ecosystem

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How Many Chains are in this web?
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Identify the Producers, Consumers, Decomposers
Count the Food Chains!
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• Open the Green Biology Text book to Pg 86
• Read about the different levels of the rain
  forest
• Create one data table that includes one of the
  following from each level of the forest
• 1 abiotic factors
• 1 producer
• 1 consumer
• 1 symbiotic relationship you must explain the
  type of symbiosis