Decomposition and mineralisation connect organic matter with inorganic nutrient pools through microbial and other biological processes. Uptake, immobilisation, transport and losses can complicate these pathways. The diagram deliberately tracks a selected nutrient rather than total biomass or energy. Matter can be reused, whereas usable energy is continually transformed and ultimately dispersed rather than cycling unchanged.
Plants, animals and ecosystems · Discover & try
How do nutrients return from dead material?
Reading level 5 of 5 · AdvancedChange
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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