eLife Assessment
With the goal of investigating the assembly and fragmentation of cellular aggregates, this manuscript investigates cyanobacterial aggregates in a laboratory setting. This investigation of the conditions and mechanisms behind aggregation is an important contribution as it yields basic understanding of natural processes and offers potential strategies for control. The combination of computational and experimental investigations in this manuscript provides solid support for the role of shear on aggregation and fragmentation. However, the role of extracellular matrix, with possibly a strong effect on aggregation, is not adequately studied.