ScienceFlash 21 - 7 maart 2008

submitted by: scienceflash

ScienceFlash aflevering 21 met o.a. hoe een file onstaat,
dode spin heeft meer seks, boren op Groenland en nieuwste model vrachtwagen voor op de maan.
Bekijk al onze vorige afleveringen op!

Earth's Outlook from Above

Fifty years after Sputnik, satellites peering down on Earth have become valuable scientific tools to study the global environment and offer much needed insight into the future of our planet.

Temporal Dynamics of European Bat Lyssavirus Type 1 and Survival of Myotis myotis Bats in Natural Colonies

submitted by: Jordi Serra-Cobo
Many emerging RNA viruses of public health concern have recently been detected in bats. However, the dynamics of these viruses in natural bat colonies is presently unknown. Consequently, prediction of the spread of these viruses and the establishment of appropriate control measures are hindered by a lack of information. To this aim, we collected epidemiological, virological and ecological data during a twelve-year longitudinal study in two colonies of insectivorous bats (Myotis myotis)...
Authors: Blanca Amengual, Hervé Bourhy, Marc López-roig, Jordi Serra-cobo

Homogenization of northern U.S. Great Lakes forests due to land use

submitted by: edtech-isu
Human land use of forested regions has intensified worldwide in recent decades, threatening long-term sustainability. Primary effects include conversion of land cover or reversion to an earlier stage of successional development. Both types of change can have cascading effects through ecosystems; however, the long-term effects where forests are allowed to regrow are poorly understood. We quantify the regional-scale consequences of a century of Euro-American land use in the northern U.S. Great...
Authors: Lisa a. Schulte, David j. Mladenoff, Thomas r. Crow, Laura c. Merrick, David t. Cleland

Resonance: Radio, Wineglasses, Opera Singers and Cycles

submitted by: RayTomes
Resonance is the quality of transmitting even tiny signals between systems that are tuned to the same frequency. Given that cycles of common period are found pervading many different disciplines, perhaps an explanation may be found in resonance. An example is the 160 minute (and associated 80 minute cycle) cycle, found in biological systems, outer planetary spacings, the rotation rates of planets, asteroids and binary stars, solar oscillation and flux and galactic cores. A cosmic pervading...

Lisa Schulte, Iowa State University Landscape Ecologist

submitted by: edtech-isu

Research News from Iowa State University's College of Agriculture and Life Sciences
Lisa Schulte, Iowa State University Landscape Ecologist, discusses her latest publication Homogenization of northern U.S. Great Lakes forests due to land use