Table 2. Additional symbols used in the simulation.

Symbols	Definition
T	Community maturation time, corresponding to the duration of a selection cycle
t	Time within a selection cycle, 0 ≤ t ≤ T
M(t), H(t)	The biomass of M or H in a community at time t
BM(t) = M(t) + H(t)	The total biomass in a community at time t
ϕM(t)	The fraction of M biomass at time t
BMtarget	Preset target total biomass of Newborns during community reproduction
IM(t), IH(t)	The integer number of M or H cells in a community at time t
φM(t)	The fraction of M individuals at time t
LM(t), LH(t)	The biomass (length) of an individual M or H cell at time t, 1 ≤ LM(t), LH(t) ≤ 2
$\overline{L}$	The average biomass (length) of an individual M or H cell, set to 1.5
P(t)	The amount of Product P in a community at time t, scaled by ${\tilde{r}}_P$
R(t)	The amount of Resource R remaining in a community at time t, scaled by $\tilde{R}\left(0\right)$
B(t)	The amount of Byproduct B in a community at time t, scaled by ${\tilde{r}}_B$
nD	The fold dilution when reproducing an Adult community
nchosen	Number of Adult communities chosen to reproduce
ntot	Total number of communities under selection in each cycle