Populations of several European passerines that winter south of the Sahara have undergone a marked decline. The causes of negative population trends are largely unknown, but ecological conditions during winter in Africa may have carry-over effects during northward spring migration and reproduction.
In the January issue of Ecology Letters, Saino, Szép, Romano, Rubolini, and Møller analyse the effect of ecological conditions in the winter quarters on timing of arrival of barn swallows (Hirundo rustica) to their Italian breeding grounds the following spring. An index of primary production obtained by satellite remote-sensing and reflecting the vigour of vegetation in an area between Ghana and the Republic of Centrafrica, where Italian swallows winter, predicted arrival date of individuals in consecutive breeding seasons. After favourable winters swallows arrived earlier and this had positive consequences for breeding success. Population trends of European long-distance migrants may thus depend on ecological conditions in their winter quarters.
Kate Stinchcombe | alfa
First-time reconstruction of infectious bat influenza viruses
25.10.2016 | Universitätsklinikum Freiburg
The nanostructured cloak of invisibility
25.10.2016 | Max-Planck-Institut für Intelligente Systeme
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...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
25.10.2016 | Life Sciences
24.10.2016 | Earth Sciences
24.10.2016 | Life Sciences