In the latest issue of the journal Biodiversity and Conservation, Karl-Olof Bergman, a researcher in conservation biology, and his colleagues publish the results of a comprehensive study of 60 pasturelands in Östergötland in Sweden. They turned out to be a haven for a number of species that are growing more and more rare in countries like Germany, the U.K., and Belgium.
The heath fritillary (Melitaea athalia), for example, is found in all locales in the Swedish study, whereas it has completely disappeared from Belgian Flanders and has declined dramatically in both western Germany and the U.K. The high brown fritillary (Argynnis adippe) can be found in 65 percent of the Östergötland pastures but has virtually disappeared from the other countries.
The pasturelands under study are 3-8 hectares in size, with deciduous tree growth and surrounded by conifers. This is a type of biotope that is receding in the rest of Western Europe. If efficiency measures in Swedish agriculture continue at today's rate, there is a danger that the same development will take place in Sweden as well. The greatest danger is the decline in small farms with grazing animals.
"Sweden has a tremendous responsibility to conserve these species and environments. If the trend is not halted, Europe runs the risk of losing some of its most diverse biotopes," says Karl-Olof Bergman.
The study, which was carried out on five occasions from May to September 2004, found 17,153 butterflies of 64 different species.
The article "Importance of boreal grasslands in Sweden for butterfly diversity and effects of local and landscape habitat factors" by Karl-Olof Bergman, Lena Ask, John Askling, Håkan Ignell, Henrik Wahlman, and Per Milberg is published in the online version of Biodiversity and Conservation.
Contact: Karl-Olof Bergman, phone: +46 (0)13-282685, cell phone +46 (0)706-252534, firstname.lastname@example.org
Åke Hjelm | idw
Multi-institutional collaboration uncovers how molecular machines assemble
02.12.2016 | Salk Institute
Fertilized egg cells trigger and monitor loss of sperm’s epigenetic memory
02.12.2016 | IMBA - Institut für Molekulare Biotechnologie der Österreichischen Akademie der Wissenschaften GmbH
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy