Breeding structure and invasiveness in social insects

Area of Science:

• Ecology
• Evolutionary Biology
• Entomology

Background:

• Social insect invasion success is often attributed to life history trait plasticity.
• Intraspecific plasticity is recognized, but interspecific variability in strategies is overlooked.
• While some invaders have multiple queens and collapsed colony boundaries, others lack these traits.

Purpose of the Study:

• To investigate how interspecific variability in life history traits contributes to invasion success in social insects.
• To identify alternative breeding system strategies that enhance invasiveness beyond common traits.
• To provide a comprehensive understanding of evolutionary factors driving social insect invasiveness.

Main Methods:

• Comparative analysis of life history traits across diverse social insect species.
• Examination of breeding systems, including asexual reproduction and mating behaviors.
• Review of existing literature on native versus introduced populations and closely related species.

Main Results:

• Life history traits differentially impact invasion success among social insect species.
• Strategies like asexual reproduction, intranidal mating, and inbreeding pre-adaptation can enhance invasiveness.
• Commonly cited traits (e.g., multiple queens) are not universally present in successful invaders.

Conclusions:

• Interspecific variability in life history and breeding systems is crucial for understanding social insect invasions.
• Beyond colony structure, reproductive strategies play a significant role in invasion success.
• Further comparative studies are needed to fully elucidate the evolutionary drivers of invasiveness in social insects.