Russian scientists studied the Zhokhov site of ancient people, which is located in the high-latitude Arctic, and described in detail the way of life of the ancient people had lived there. It turned out that, despite the sparsely populated area, the ancient people had communicated with representatives of other territories and had even exchanged various objects with them through some kind of the fairs.
Scientists found that riverine dissolved inorganic nitrogen in the USA has increased primarily due to the use of nitrogen fertilizers. In contrast, European rivers were affected mainly by point source pollution. However, both aspects are equally important for aquatic environments in China.
Scientists from Institute of Atmospheric Physics, Chinese Academy of Sciences found that the projection uncertainty of Sahel summer precipitation among the climate models is closely related to the historical precipitation simulation in South Asia and the western North Pacific. They use the specified historical simulation biases to calibrate future projections and found that more water resources are available in the twenty-first century, with an increase of 119% after the calibration.
People around the world paint their walls different colors, buy plants to spruce up their interiors and engage in a variety of other beautifying techniques to personalize their homes, which inspired a team of researchers to study about 50,000 living rooms across the globe.
Identifying changes in the geographic distribution of opioid-related deaths is important, and this study analyzed data for more than 351,000 US residents who died of opioid-related causes from 1999 to 2016. Researchers report increased rates of opioid-related deaths in the eastern United States, especially from synthetic opioids. In 2016, there were 42,249 opioid-related deaths (28,498 men and 13,751 women) in the United States for an opioid-related mortality rate of 13 per 100,000 people.
The world's largest coordinated network of protected areas is not located at the South Pole or in Australia, Africa, Asia or on the American continents -- but in Europe. As part of an international team, researchers from the Leibniz-Institute of Freshwater Ecology and Inland Fisheries have examined how effectively Natura 2000 protects listed habitat types in Germany. The result: although the existing network includes sites of special interest, not all habitat types are represented proportionally.
Researchers at the German Centre for Integrative Biodiversity Research (iDiv) and Martin Luther University Halle-Wittenberg (MLU) have succeeded in constructing, from scattered data, a world map of the diversity of tree species. Climate plays a central role for its global distribution; however, the number of species in a specific region also depends on the spatial scale of the observation, the researchers report in Nature Ecology and Evolution. The new approach could help improve conservation.
Simply protecting small forests will not maintain the diversity of the birds they support over the long run, a Rutgers-led study says. Forests need to be carefully monitored and managed to maintain their ecological integrity.
ORNL story tips: Oak Ridge National Laboratory neutrons investigate novel crystals' ability to capture carbon dioxide from air; gleaning valuable data from Twitter used to quickly map power outages, emergencies; ORNL's lightweight, heat-shielding graphite foam tested at Germany's Wendlestein 7-X stellarator yields positive results in fusion reactors; open source software scales up analysis of motor designs to run on supercomputers.
A study of a stretch of highway in Quebec looks at the effect of road fencing and underground passages on the number of roadkill deaths of small and medium-sized mammals. The study found that roadkill numbers were higher at the ends of road fences, suggesting that they are not long enough to prevent animals from crossing busy roadways.