Argentine ants are a serious agricultural and domestic pest in Europe.
© Charles König
Cooperation is a better strategy than conflict for expat Argentine ants.
© Charles König
Invading insect empire stretches 6,000 kilometres.
An invading empire has conquered Europe. One super-colony of South American ants, with millions of nests and billions of individuals, stretches 6,000 kilometres around the Mediterranean and Atlantic coasts, researchers have found.
Every ant in the colony treats every other as its nest-mate - even though they may be quite unrelated. The nests have buried their differences to create the largest cooperative unit ever discovered, say Laurent Keller of the University of Lausanne, Switzerland, and his colleagues1.
Suspension of hostilities
Keller and his colleagues collected Argentine ants from the northwest corner of Italy, along the south coast of France, and around the Iberian peninsula, ending at the northwest corner of Spain.
In South America, ants from nests a few metres apart fight to the death. Most European ants showed no aggression towards each other, even when their homes were thousands of kilometres apart.
This suspension of hostilities allows nests to crowd together, the team speculates. Freed from the predators and parasites of their homeland, populations reach higher densities. Cooperation becomes a better strategy than conflict, even though the ants are not related, and so share no evolutionary interest in each other’s wellbeing.
Ants use chemical badges to recognize nest-mates. Keller speculates that after the ants arrived in Europe in the 1920s, they teamed up with unrelated ants that happened to share a badge in order to achieve domination.
Argentine ants have not quite achieved European unification, however. The researchers found that the nests they collected fell into two blocs that cooperated amongst themselves but showed each other no quarter. The second, smaller super-colony lives in Catalonia, Spain.
JOHN WHITFIELD | © Nature News Service
Gene therapy shows promise for treating Niemann-Pick disease type C1
27.10.2016 | NIH/National Human Genome Research Institute
'Neighbor maps' reveal the genome's 3-D shape
27.10.2016 | International School of Advanced Studies (SISSA)
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
27.10.2016 | Materials Sciences
27.10.2016 | Physics and Astronomy
27.10.2016 | Life Sciences