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Biology — Energy Flow Through Trophic Levels

The ten-percent rule of energy transfer.

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Energy flow through trophic levelsProducers1000Primary consumers100Lost as heat999Secondary consumers10Tertiary consumers1Conserved — 1000 in, 1000 out, across 5 nodes and 6 flows. The widths add up.5 nodes named only by a flow — `Producers`, `Primary consumers`, `Lost as heat`, `Secondary consumers`, `Tertiary consumers`. They are drawn under the bare id…Conserved: 1000 enters at `Producers` and 1000 leaves at `Lost as heat`, `Tertiary consumers`, and every one of the 2 nodes between them passes on exactly wha…

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title "Energy flow through trophic levels"
flow "Producers" "Primary consumers" 100
flow "Producers" "Lost as heat" 900
flow "Primary consumers" "Secondary consumers" 10
flow "Primary consumers" "Lost as heat" 90
flow "Secondary consumers" "Tertiary consumers" 1
flow "Secondary consumers" "Lost as heat" 9