ES 9_30_09 Energy Flow

ES 9_30_09 Energy Flow - 9/30/09 What is energy? Types of...

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9/30/09 1 What is energy? Types of Energy
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9/30/09 2 Energy Changes Form Laws of Thermodynamics • First Law: Conservation of energy – If you can’t create new energy, then where did all the energy come from that is stored or in motion on Earth? – If it doesn’t get destroyed, why do we continue to need more input on Earth?
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9/30/09 3 Laws of Thermodynamics • Second Law: Energy “degrades” as it is transferred – Only some of the energy transferred is usable – Some gets “lost” to surrounding environment or gets “used up” and is not stored Why is this impossible? What does this have to do with ECOLOGY?
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9/30/09 4 Why do organisms need energy? Why do they have to eat organic molecules to get it? Respiration Overall reaction is similar to combustion C 6 H 12 0 6 + 60 6 + a little initiation energy 6C0 2 + 6H 2 0 + release of stored energy for use
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9/30/09 5 Trophic Levels • Since you can’t get energy from nowhere (1 st Law), you have to get it into food somehow in the first place • 1 st Trophic Level: Autotrophs or Producers Photosynthetic Autotrophs
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This note was uploaded on 12/26/2009 for the course LSP T07.5005.0 taught by Professor Caseyking during the Fall '09 term at NYU.

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ES 9_30_09 Energy Flow - 9/30/09 What is energy? Types of...

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