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Unformatted text preview: so they need to be recycled.
• Energy flows through ecosystems
Sun's energy is used by plants for photosynthesis.
l This energy is not transferred from one trophic level to the next with perfect efficiency
The energy is never returned to plants.
• Of the food eaten by a consumer:
Some is never digested and eliminated as feces
A large proportion of the rest of the energy is used for the production of ATP and lost as heat
Only energy converted into body weight or additional offspring is available to carnivores of the consumer.
• Chemical cycling:
Chemicals are not created or destroyed, so they must be cycled through the ecosystem.
Ll Cycles often include biological and abiotic stages.
All the major biological atoms, carbon, phosphorus, nitrogen, are cycled....
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This document was uploaded on 03/27/2014 for the course BIOLOGY Bio 2 at Timber Creek High.
- Fall '09