Modularity and connectivity of nest structure scale with colony size.
Julie S Miller1, Emma Wan1, Sean O'Fallon1
1Department of Ecology and Evolutionary Biology, University of California, Los Angeles, Los Angeles, California, 90095.
Evolution; International Journal of Organic Evolution
|November 13, 2021
Summary
Ant nests evolve complex structures like more chambers and branching tunnels to manage resources and information as colony size increases, similar to how large animals develop specialized systems.
Area of Science:
- Ecology
- Evolutionary Biology
- Animal Behavior
Background:
- Large body sizes in unitary organisms necessitate specialized structures for efficient resource transport.
- Social insect colonies, like ant colonies, face similar transport challenges for information and resources as their population size grows.
Purpose of the Study:
- To investigate if ant nest structures evolve to mitigate transport challenges associated with larger colony sizes.
- To test hypotheses regarding nest subdivision, branching, and shortcuts as adaptations to colony size.
Main Methods:
- Phylogenetically controlled meta-analyses were used to compare nest structures across ant species with varying colony sizes.
- Examined attributes such as nest subdivision (chambers), branching (tunnels), and the presence of shortcuts (cross-linking tunnels).
Main Results:
- Findings support the hypothesis that nest subdivision and branching are adaptations to colony size.
- Species with larger colonies exhibit nests with a greater number of chambers and more branching tunnels.
Conclusions:
- Ant nest architecture evolves in response to colony size, mirroring solutions seen in large-bodied unitary organisms.
- Suggests convergent evolution of transport-facilitating structures across different biological scales and taxa.
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