Table 1 Parameters used in simulations (unless mentioned otherwise).

From: Phototaxis as a Collective Phenomenon in Cyanobacterial Colonies

Parameter

Quantity

Value

R

cell radius

1

A

appendage length

4R

a

number of appendages per cell

4

γ 0

inverse of initial cell speed

1/(0.1R)

(k 1, k 2)

force parameters

(1, 2)

S 0

initial slime within colony

1000

S max

maximum slime a grid point can contain

1000

S rate

slime deposition rate

0.1

p photo

phototaxis probability

0.1

ϕ ch

proportion of freeloaders

0

ρ

average colony density

0.05