Mediterranean Sea Invaded By 900 Alien Species

Credit: Vangelis Pavlidis More than 900 new alien species have been encountered in the coastal environments of the eastern Mediterranean Sea in recent decades, including the poisonous pufferfish. The invasion of alien species has had the consequence that the whole food chain is changing, while there is a lack of knowledge on which to base relevant risk assessments, a four-year study conducted at the University of Gothenburg shows. The poisonous pufferfish (Latin: Lagocephalus sceleratus) is one of the species that have invaded the coastal environments of the eastern Mediterranean Sea. "The Mediterranean is the world's most invaded sea, but our understanding of how alien species affect ecosystems is inhibited by a lack of basic knowledge of the animal and plant communities on the coast. Once species have become established in the Mediterranean it is almost impossible to eradicate them," says Stefan Kalogirou of the Department of Marine Ecology at the University of Gothenburg. When the Suez Canal was completed in 1869, a corridor was created for the spread of alien species to the Mediterranean Sea, which is now undergoing great changes in animal and plant communities. In recent years, regular reports of alien species from several of Aliens in the Mediterranean Sea from Claudio Valerio on Vimeo. the coastal...

Read More........→July 21, 2013

The neuroweapons threat

JAMES GIORDANO: James Giordano is a professor of neurology, chief of the Neuroethics Studies Program, and co-director of the O’Neill-Pellegrino Program in Brain Science and Global Health Law and Policy at...More Nearly two years ago, Juliano Pinto, a 29-year-old paraplegic man, kicked off the World Cup in Brazil with the help of a brain-interface machine that allowed his thoughts to control a robotic exoskeleton. Audiences watching Pinto make his gentle kick, aided as he was by helpers and an elaborate rig, could be forgiven for not seeing much danger in the thrilling achievement. Yet like most powerful scientific breakthroughs, neurotechnologies that allow brains to control machines—or machines to read or control brains—inevitably bring with them the threat of weaponization and misuse, a threat that existing UN conventions designed to limit biological and chemical weapons do not yet cover and which ethical discussions of these new technologies tend to give short shrift. (It may seem like science fiction, but according to a September 2015 article in Foreign Policy, “The same brain-scanning machines meant to diagnose Alzheimer’s disease or autism could potentially read someone’s private thoughts. Computer systems attached to brain tissue that allow paralyzed patients to control robotic appendages with thought alone could also...

Read More........→March 07, 2018

Smartphones uncover how the world sleeps

@ https://www.flickr.com/ licenses/by/2.0/ A pioneering study of worldwide sleep patterns combines math modelling, mobile apps and big data to parse the roles society and biology each play in setting sleep schedules. The study, led by University of Michigan mathematicians, used a free smartphone app that reduces jetlag to gather robust sleep data from thousands of people in 100 nations. The researchers examined how age, gender, amount of light and home country affect the amount of shut-eye people around the globe get, when they go to bed, and when they wake up. Among their findings is that cultural pressures can override natural circadian rhythms, with the effects showing up most markedly at bedtime. While morning responsibilities like work, kids and school play a role in wake-time, the researchers say they're not the only factor. Population-level trends agree with what they would expect from current knowledge of the circadian clock. "Across the board, it appears that society governs bedtime and one's internal clock governs wake time, and a later bedtime is linked to a loss of sleep," says Daniel Forger, who holds faculty positions in mathematics at the U-M College of Literature, Science, and the Arts, and in the U-M Medical School's Department of Computational Medicine and Bioinformatics. "At the same time, we found...

Read More........→May 29, 2016