The bee Tetragonula builds its comb like a crystal

Area of Science:

• Biophysics
• Entomology
• Crystallography

Background:

• Stingless bees in the genus Tetragonula exhibit complex 3D brood comb architectures, often displaying spiral or target patterns.
• Similar spiral and target patterns are observed in the molecular arrangement of crystals during nucleation and growth.

Purpose of the Study:

• To investigate the underlying dynamics governing brood comb construction in Tetragonula bees.
• To determine if the principles of crystal growth dynamics can explain the observed patterns in bee combs.

Main Methods:

• Analysis of the spatial and temporal dynamics of brood comb construction in Tetragonula.
• Development and application of a minimal coupled-map lattice model.
• The model is based on excitable-medium dynamics, drawing parallels with crystal growth processes.

Main Results:

• The study demonstrates that identical excitable-medium dynamics govern both crystal nucleation/growth and Tetragonula comb construction.
• The minimal coupled-map lattice model successfully replicates the spiral and target patterns observed in bee combs.

Conclusions:

• The construction of complex brood comb structures by Tetragonula bees can be explained by fundamental biophysical principles.
• Excitable-medium dynamics provide a unified framework for understanding pattern formation in both biological systems (bee combs) and physical systems (crystals).