Science & Technology

Scientists Explore How Fire Ants’ Raft Building Skills React As Fluid Forces Change

Spinning hearth ant raft. Credit score: Hungtang Ko

Fire ants construct residing rafts to outlive floods and wet seasons. Georgia Tech scientists are learning if a fireplace ant colony’s capacity to answer adjustments of their surroundings throughout a flood is an instinctual conduct and the way fluid forces make them reply.

Hungtang Ko and David Hu offered the science behind this insect conduct, focusing their dialogue on how the residing raft adjustments dimension underneath numerous environmental circumstances on the American Bodily Society’s Division of Fluid Dynamics 72nd Annual Assembly on November 26, 2019.

The pink imported hearth ant (Solenopsis invicta) can optimize its capacity to repel water by linking its physique along with tens of 1000’s of its friends to construct large floating colonies.

“We predict the response is an lively course of. Fire ants are capable of sense the change in pressure when completely different fluid circumstances are utilized,” Ko stated.

The researchers discovered completely different fluid behaviors, resembling vortexes, may change the scale of the hearth ant raft in a number of methods. They found rotation of water can inhibit exploratory behaviors of particular person hearth ants, whereas centrifugal movement doesn’t affect the colony.

“Our present speculation is that they discover much less, as a result of they should kind a stronger bond with their neighbors. We’re nonetheless engaged on testing the speculation,” Ko stated. “We predict the impartial response in people is sufficient in resulting in the system-level deformation that we observe.”

Stronger bodily bonds between particular person hearth ants result in sturdy and safer rafts. The person ant’s capacity to answer environmental adjustments is essential to the sustainability of their raft and the survival of the colony.

The session, “Shrinking spinning hearth ant rafts,” was offered as a part of a session on organic fluid dynamics and collective conduct.


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