A fallen leaf can feed a network of organisms. Some break it into pieces, while microbes carry out chemical breakdown. Nutrients can move into forms available to plants again. Follow the marked nutrient rather than imagining the whole leaf simply disappears. Energy is used and dispersed during these processes, while matter can pass through repeated cycles.
Plants, animals and ecosystems · Discover & try
How do nutrients return from dead material?
Reading level 2 of 5 · DevelopingChange
Word help
decomposer
An organism involved in breaking down dead organic material.
nutrient cycling
Movement and reuse of nutrient material among living and nonliving parts of a system.
Watch · Try · Explain
See how it works
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One symbolic nutrient route with compressed time; it does not turn whole leaves into one substance or recycle energy unchanged.
What to look for
- Dead material still contains nutrients
- Microbes transform organic matter
- Matter cycling differs from energy flow
Explain what you noticed
A nutrient atom from a fallen branch is later taken up by a young plant. What does that illustrate?
Keep this idea: Track material recycling separately from energy flow.
Follow the sources
- U.S. Department of Energy — DOE Explains the Plant Microbiome
- Smithsonian National Zoo — Invertebrates in Nutrient Cycling
Source material checked 2026-10-28. Explanations and activities by Nepedia. Source links do not imply endorsement.
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