Fire Ant Rafts Form Thanks to a Force Known as the ‘Cheerios Effect’

Contact

Joshua Stewart
College of Engineering

Sidebar Content
No sidebar content submitted.
Summaries

Summary Sentence:

In water, ants tend to flail and actively repel each other but are drawn together by physics

Full Summary:

Ever stare at those last few pieces of breakfast cereal and watch them seemingly clump together or cling to the side of the bowl? Scientists have dubbed it the “Cheerios effect,” the combination of forces causing those clumps. Researchers at Georgia Tech have discovered those same forces draw small numbers of ants together to begin to form water-repellent ant rafts — even though the ants seem to be uninterested in collaborating with their neighbors for survival.

Media
  • Ant raft closeup Ant raft closeup
    (image/jpeg)

Ever stare at those last few pieces of breakfast cereal and watch them seemingly clump together or cling to the side of the bowl?

Scientists have dubbed it the “Cheerios effect,” the combination of forces causing those clumps. Researchers at Georgia Tech have discovered those same forces draw small numbers of ants together to begin to form water-repellent ant rafts — even though the ants seem to be uninterested in collaborating with their neighbors for survival.

Described in the journal Physical Review Fluids, their study explains for the first time the underlying forces at play in attracting ants to each other. Ants clump together into rafts to survive during flooding, and the team determined it takes exactly 10 ants to form a stable raft.

“I think the surprising thing here is that ants prioritize exploration, actively avoiding each other on the water surface. They instead rely on physical forces to bring them together — the Cheerios effect,” said Hu, professor in the George W. Woodruff School of Mechanical Engineering and the School of Biological Sciences. “Previously, we only studied the change in the shape of the raft once formed; we never asked how ants find each other on the water surface.”

Read the full story on the College of Engineering website.

Additional Information

Groups

College of Engineering, School of Mechanical Engineering, Research Horizons, College of Sciences, School of Biological Sciences

Categories
No categories were selected.
Related Core Research Areas
No core research areas were selected.
Newsroom Topics
No newsroom topics were selected.
Keywords
David Hu, fire ants rafts, Fire Ants, Hungtang Ko, G.W. Woodruff School of Mechanical Engineering, go-researchnews, School of Biological Sciences
Status
  • Created By: Joshua Stewart
  • Workflow Status: Published
  • Created On: Sep 28, 2022 - 1:19pm
  • Last Updated: Oct 10, 2022 - 2:34pm