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Environmental News Network -- Know Your Environment
A genomic study of Puerto Rico's Africanized honey bees – which are more docile than other so-called “killer bees” – reveals that they retain most of the genetic traits of their African honey bee ancestors, but that a few regions of their DNA have become more like those of European honey bees. According to the researchers, these changes likely contributed to the bees' rapid evolution toward gentleness in Puerto Rico, a change that occurred within 30 years.
A global conversion to organic farming can contribute to a profoundly sustainable food system, provided that it is combined with further measures, specifically with a one-third reduction of animal-based products in the human diet, less concentrated feed and less food waste. At the same time, this type of food system has extremely positive ecological effects, i.e. considerable reduction of fertilizers and pesticides, and reduced greenhouse gas emissions – and does not lead to increased land use, despite lower agricultural yields. These are the findings of a new study, which included the Vienna-based Department of Social Ecology among its contributors. Results have recently been published in “Nature Communications”.
Acclimation means the ability of both animals and plants to adjust their physiology when it gets hotter or colder. In this way, individual organs are able to interact effectively and various processes in the body function optimally in varying conditions.
In 2016, news about the Zika virus in Brazil made the headlines in Europe for the first time. With approximately 65 million people affected, it is one of the largest epidemics in the last few years. The Olympics additionally fuelled fears that the virus could spread globally. When the first cases of newborns with microcephaly, i.e. malformations of the brain, were observed in connection to Zika, it became apparent that further research was called for. The DZIF responded to this global challenge and, under the leadership of Jan Felix Drexler, Charité – Universitätsklinikum Berlin, initiated a German alliance project with Brazilian scientists, which investigates the pathogenesis and epidemiology of Zika.
Two new studies from The University of Texas at Austin have significantly improved scientists’ ability to predict the strength and duration of droughts caused by La Niña – a recurrent cooling pattern in the tropical Pacific Ocean. Their findings, which predict that the current La Niña is likely to stretch into a second year, could help scientists know years in advance how a particular La Niña event is expected to evolve.
Some impacts of global warming – such as sea level rise and coastal flooding – are already locked in and unavoidable, according to a major research project.
