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Carbon balance as a function of the R : P ratio (ρ), for three different values of the ratio of storage to photosynthesis (α is 0, 1/4, 1/2). The graph shows carbon use in storage (S), growth (G), growth respiration (Rg) and maintenance respiration (Rm). All four flows are normalized with respect to P, so they sum to 1. The hatched parts of the graph indicate impossible values of ρ.
