energy flow ecosystems - allendale school district · energy in ecosystems owl food web.notebook 5...
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energy in ecosystems owl food web.notebook
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December 14, 2012
Dec 128:33 PM
Hi, everybody!
I'm Barnaby the Barn Owl. I'm here to talk about:
ENERGY FLOW in
ECOSYSTEMS
energy in ecosystems owl food web.notebook
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December 14, 2012
Dec 128:33 PM
You already know that materials like Water, Carbon, Nitrogen, and Oxygen CYCLE through ecosystems over and over and over and over and over and over and over and over and over and over and over and
Sheesh. They get it already!
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That's easy: ONCE!
Okay, Smartie-pants! Then you can answer the next question: How many times does energy travel through an ecosystem?
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December 14, 2012
Dec 128:57 PM
You're right!It all starts with the energy from the sun...
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Dec 128:58 PM
Green plants capture the energy from the sun in a process called Photosynthesis, a chemical reaction in which green plants use water and carbon dioxide.The energy is stored in GLUCOSE.
Flow of
energ
y
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Dec 129:08 PM
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Dec 129:35 PM
Organisms that can make their own food are calledPRODUCERSaka autotrophs
"auto" = "self "troph" = "feeding"
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Dec 129:19 PM
Producers use most of the energy they make for themselves!
They release the energy from the glucose by undergoing the process of RESPIRATION
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Dec 129:23 PM
Remember, these two processes are OPPOSITE of each other!
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Dec 129:24 PM
Some of the energy that is not used by the producer or lost as heat is available to consumers.
Energy flow
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Dec 129:11 PM
Organisms that cannot make their own food are called
CONSUMERS
aka Heterotrophs
"hetero" = "other" "troph" = "feeding
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December 14, 2012
Dec 129:29 PM
A consumer that gets its energy from producers is a primary
or first level consumer.
It can also be called an herbivore.
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Dec 129:41 PM
Most of the energy the primary consumer gets from the producer is used by the primary consumer.
It takes lots of energy to be a vole!
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Dec 129:47 PM
Some of the energy is lost as heat...
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December 14, 2012
Dec 129:48 PM
Some of the energy is incorporated into the body of the (not lost to the atmosphere or used by the consumer itself. This energy is available to the next trophic level.
Uhoh...I think I know what's coming next...
"feeding level"
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Dec 1310:43 PM
Secondary Consumers get their energy from primary consumers.
This barn owl is a carnivore.
I knew it! Bummer...
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Dec 1310:50 PM
Most of the energy the secondary consumer gets from the primary consumer is used by the secondary consumer.
I'm using some energy to do a little dance!
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Dec 129:49 PM
Some of the energy is lost as heat, but some is stored and can be passed on to the next trophic level...
Barn owls are most vulnerable to predation as owlets.
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A consumer that eats a consumer that already ate a consumer is a 3rd order or Tertiary Consumer
Could be a carnivoreor an omnivore....
or maybe a scavenger....
Don't hate me because I'm beautiful...
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December 14, 2012
Dec 129:49 PM
Consumers that hunt and kill other consumers are called predators. The animals that are hunted and killed are called prey.
Some common prey of the barn owl.Mole Pocket Gopher
Mouse ShrewVole
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The transfer of energy from the sun to producer to consumers can be shown in a food chain.
producer
primary consumer
secondary consumer
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Dec 129:10 PM
Food chains are nothing new....
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Another way of showing the transfer of energy is an
ENERGY PYRAMID.
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Dec 129:51 PM
An Energy Pyramid shows:
• The amount of available energy decreases as it passes through the ecosystem.
• It takes a larger number of producers to support a smaller number of primary consumers.
• It takes a larger number of primary consumers to support a smaller number of secondary consumers.
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December 14, 2012
Dec 1311:54 PM
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Roughly 10% of the energy from one level is passed on to the next level.
This is why I must consume mass quantities of prey!
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Dec 141:13 AM
grass grasshoppershrew
barn owl
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FOOD WEBSare interconnected food chains.
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Here is a food web of a barn owl.
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Dec 1412:03 AM
Can an animal can occupy more than one level of a food web?
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Dec 1412:03 AM
primary consumer
secondary consumertertiary consumer
primary consumer
primary consumer
secondary consumer
secondary consumer
producer
YES -- It depends on which chain you follow...
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Dec 128:36 PM
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Dec 1412:00 AM