Individual versus social complexity, with particular reference to ant colonies.

Area of Science:

• Ecology and Evolutionary Biology
• Behavioral Ecology
• Sociobiology

Background:

• Insect societies (ants, bees, wasps, termites) display vast differences in social complexity.
• Social complexity involves traits like colony size, polymorphism, and foraging strategies.
• Existing studies explore correlates of social complexity; this review integrates additional factors into a unified framework.

Purpose of the Study:

• To propose and integrate additional correlates of social complexity in insect societies.
• To test the hypothesis that individuals in highly social ant species are less complex than those in simpler species.
• To explore parallels between insect sociality and other social entities, such as multicellular organisms.

Main Methods:

• Categorization of correlates into polyphenism, totipotency, organization of work, and communication/functional integration.
• Utilizing examples from social insect literature, primarily ants, to illustrate concepts and trends.
• Expanding analysis to draw parallels with multicellular organisms to identify common causal relationships.

Main Results:

• Complex societies are characterized by large colony size, worker polymorphism, and behavioral specialization.
• Workers in complex societies show a loss of totipotency and reduced individual complexity.
• Findings support the hypothesis that individuals in highly social ant species are less complex.

Conclusions:

• Complex insect societies demonstrate a trade-off between individual complexity and colony-level complexity.
• Colony size and worker specialization are key drivers of social complexity.
• Parallels with multicellular organisms suggest universal principles of social organization.