  We investigate an off-lattice Eden model where the growth of new cells is
performed with a probability dependent on the availability of resources coming
externally towards the growing aggregate. Concentration of nutrients necessary
for replication is assumed to be proportional to the voids connecting the
replicating cells to the outer region, introducing therefore an nonlocal
dependence on the replication rule. Our simulations point out that the
Kadar-Parisi-Zhang (KPZ) universality class is a transient that can last for
long periods in plentiful environments. For conditions of nutrient scarcity we
observe a crossover from regular KPZ to unstable growth, passing by a transient
consistent with the quenched KPZ class at the pinning transition. Our analysis
sheds light on results reporting on the universality class of kinetic
roughening in akin experiments of biological growth.
