"Our results are novel," says Jose Hierro (University of Montana and Universidad Nacional de La Pampa). "No one else has ever shown that ruderals, that is, plants that are generally adapted to disturbance, respond differently to disturbance in native versus non-native regions."
The researchers conducted their research over three years in southern Turkey, where the weed is native, and in California and central Argentina, two regions where the weed is non-native and remarkably abundant. Their findings, published in the August issue of The American Naturalist, question the assumption that disturbance alone is sufficient to explain the remarkable success of invasive plant species in non-native ranges. Instead, the researchers argue, the common and powerful effects of disturbance must act in concert with other factors to allow certain species to dominate plant communities only where they occur as exotics.
The researchers suggest that soil pathogens suppress the growth of certain species and may contribute to the disproportionately powerful effect of disturbance in introduced regions.
"The potential for disturbance to have much stronger effects in invaded systems than in native systems is not trivial," says Ragan Callaway (University of Montana). "If disturbance in non-native regions is no different than in native regions, then clearly the management response is to limit disturbance and thus to limit invasions. However, if disturbance in invaded regions has a much stronger effect that in native regions, then the management response must look beyond disturbance to control or limit the invasion."
Suzanne Wu | EurekAlert!
Safeguarding sustainability through forest certification mapping
27.06.2017 | International Institute for Applied Systems Analysis (IIASA)
Dune ecosystem modelling
26.06.2017 | Albert-Ludwigs-Universität Freiburg im Breisgau
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....
A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...
Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision
Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...
21.07.2017 | Event News
19.07.2017 | Event News
12.07.2017 | Event News
21.07.2017 | Earth Sciences
21.07.2017 | Power and Electrical Engineering
21.07.2017 | Physics and Astronomy