The following supplementary material is available for this article:

Table S1. Model parameter descriptions and values.

Table S2. Effects of C, N, and P product additions.

Figure S1. Schematic of EnzModel structure.

Figure S2. Mean population sizes of cheaters and producers with changes in EConstit and EDiff.

Figure S3. Spatial patterns of microbe populations, enzymes, and products on the grid.

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