Making the Nature Conservancy’s list of Last Great Places doesn’t guarantee a safe habitat. The osprey, a fish-feeding bird, nests along the Delaware River and Bay and continues to face contaminated living conditions. Although stable, osprey reproduction is stressed, according to an article published in the latest issue of Environmental Toxicology and Chemistry.
Ospreys and other wildlife share the Delaware River and Bay area with factories, manufacturers and water traffic using the Bay’s ports. The osprey population suffered substantial losses beginning in the 1950s with the widespread use of organochlorine pesticides. Contamination continued into the late 1980s when a study reported eggshell thinning and reproduction impairment mostly caused by p,p?-dichlorodiphenyldichloroethylene (p,p?-DDE). Using the same study sites, 1998 samples showed that contamination dropped off to levels where eggshell thickness was similar to the pre-DDT era.
In this study, researchers conducted the first large-scale ecotoxicological evaluation of ospreys nesting along the Delaware River, Bay and coast. Based on samples taken in 2002, they concluded that contaminant concentrations were predictive of hatching success. These contaminants included DDT, dieldrin, chlordane, polychlorinated biphenyls (PCBs) and dioxins to name a few.
Safeguarding sustainability through forest certification mapping
27.06.2017 | International Institute for Applied Systems Analysis (IIASA)
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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 –...
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21.07.2017 | Physics and Astronomy