Biology / Bio 0613 · Atom · ~20 seconds
"Energy Is Recycled in an Ecosystem"
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Treating an ecosystem's energy like its matter ignores the second law: each transfer between organisms permanently loses usable energy as heat, per Bio 0506.
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A wolf eating a deer that ate grass recovers only a fraction of the sunlight energy the grass captured.
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An ecosystem needs constant new solar energy, while its matter can cycle indefinitely with no outside input.
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- Nothing yet depends on this.