Topic 28Biology
C4.2 Transfers of energy and matter
Trophic levels and food webs, energy pyramids and Lindeman's 10% rule, biogeochemical cycles (carbon, nitrogen, water), GPP vs NPP, and global productivity patterns.
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Trophic levels and food websSign up
Producers, consumers, decomposers · Food webs and energy pyramids (10% rule)
30 min
Biogeochemical cycles (C, N, water)Sign up
Carbon cycle reservoirs and fluxes (incl. anthropogenic) · Nitrogen cycle (4 bacterial steps) and water cycle
30 min
Productivity and ecosystem efficiencySign up
GPP vs NPP · 10% rule and global NPP variation
30 min