Table 1. Some standard values for parameters, and their effects.

Parameter description	Standard parameter value	Extinction	Only primary producers	Primary producers & specialized carnivores	Arms race out of control
Food increase per surface unit per turn	0.125	0–0.02	0.02–0.05	>0.05	—
Fraction of food decayed per turn	0.0005	>0.06	<0.06, >0.03	<0.03	—
Prey assembly efficiency	1.0	—	0–0.1	0.1–1.0	—
Food assembly efficiency	0.02	0–0.012	0.012–0.015	0.015–0.025	>0.03
Diameter ratio required for carnivorism	2.0	—	>3.5	<3.5	—
Multiplier to metabolism in case of movement	2.0	—	>20.0	<20.0	—
Food store size	50.0	0	>0–5	>5	—
Weight dependent metabolism factor	0.0001	>0.0085	—	<0.0085	—
Random death chance (per turn)	0.001	>0.002	<0.002, >0.0016	<0.0016, >0.0007	<0.0007

Note: The standard values give rise to a stable cohabitation of primary producers and carnivores. The last four columns show what value ranges for each parameter lead to the four distinctive behaviors (given that the other parameters are kept at standard values). The last column only shows those cases in which arms races lead to a unicell population too small in numbers to support carnivores.