CT scanning shows how ants build without an architect

Sep 26, 2011
CT scanning shows how ants build without an architect
Four-dimensional ants nests from the same donor colony under different experimental treatments Image by Minter et al

Ant nests are some of the most remarkable structures in nature. Their relative size is rivalled only by our own skyscrapers but there is no architect or blueprint.  Instead they are built collectively, through self-organization and the local interactions of ants with one another and their environment.  So, how do ants decide what and where to build?

Ant nests are some of the most remarkable structures in nature.  Their relative size is rivalled only by our own skyscrapers but there is no architect or blueprint.  Instead they are built collectively, through self-organization and the local interactions of with one another and their environment.  So, how do ants decide what and where to build?

To answer these questions, geologist Dr Nicholas Minter, archaeologist, Dr Kate Robson Brown, and biologist Professor Nigel Franks used high-resolution CT scanning to obtain repeated three-dimensional images of ant nests throughout their excavation.

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Previous research on ant nests involved making plaster casts but such methods are destructive.  By using , this study avoided any destruction and also allowed the researchers to scan the same nest on multiple occasions, thus making it possible to observe individual nests as they were being excavated.

The resulting high-resolution dataset on the four-dimensional growth of ant nests – the first of its kind – allowed the researchers to study in much greater detail the rules of ant nest excavation and the effect of sediment structure on nest architecture.

Dr Robson Brown said: “Our results show that excavation is controlled by the density of ants and is also influenced by the structure of the sediment through which they tunnel.  So, ant nest architecture is influenced by both social and environmental factors.”

The findings of this unique interdisciplinary collaboration are published in the Journal of the Royal Society Interface.

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More information: Minter, N. J., Franks, N. R. and Robson Brown, K. A. 2011. ‘Morphogenesis of an extended phenotype: four-dimensional ant nest excavation’  J. R. Soc. Interface doi:10.1098/rsif.2011.0377

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JRDarby
not rated yet Sep 26, 2011
I wonder if the CT scan's EMF influenced it at all too.