Plant-eating insects inhabit all forest ecosystems, but sometimes their numbers explode, resulting in massive tree defoliation. In the October issue of the Journal of Tropical Ecology researchers from the Smithsonian Tropical Research Institute (STRI) associate a severe moth outbreak with drought conditions following the 1997-1998 El Niño Southern Oscillation (ENSO) event in a dry lowland forest near Panama’s Pacific coast. If ENSO events become more common, repeated herbivore outbreaks might alter forest species composition.
"Although we regularly monitor insect populations from STRI’s Canopy Crane system, we were actually tipped off about the outbreak by the crane operator, who complained that his parked car was covered with insect droppings," explains STRI post-doctoral fellow, Sunshine Van Bael.
Moth larvae devoured 250% more leaf material than usual even as researchers were setting up an experimental protocol to monitor herbivores and leaf damage on twenty tree species reachable from the gondola on the arm of a 42 m tall modified construction crane in Panama City’s Metropolitan Park. The crane, one of two in Panama and nine worldwide, permits scientists to ascend into the treetops to study previously inaccessible aspects of forest dynamics and species diversity.
Beth King | 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
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
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...
21.07.2017 | Event News
19.07.2017 | Event News
12.07.2017 | Event News
25.07.2017 | Physics and Astronomy
25.07.2017 | Earth Sciences
25.07.2017 | Life Sciences