GRANTS PASS, OREGON — A new study has determined for the first time just how quickly frogs and other amphibians are disappearing around the United States, and the news is not good.
The U.S. Geological Survey said Thursday that populations of frogs, salamanders and toads have been vanishing from places where they live at a rate of 3.7 percent a year.
That puts them on a path to disappearing from half their inhabited sites nationwide in 20 years.
USGS ecologist Michael J. Adams said the alarming news is that even species thought to be doing OK are declining, though at a slower rate, 2.7 percent a year.
‘These are really ancient species that have been surviving a long time on earth through all kinds of changes,’ Adams said. ‘It’s just a concern to see.’
The data showed that species on the International Union for Conservation of Nature red list of declining species were disappearing from sites at an even higher rate, 11.6 percent a year. That would result in half the sites being unoccupied in six years. A third of amphibian species are on the red list.
‘They just disappear,’ Admas said. ‘Populations are going away.’
It has been known for a long time that amphibians are […]
Remains of endangered Hawaiian petrels – both ancient and modern – show how drastically today’s open seas fish menu has changed.
A research team, led by Michigan State University and Smithsonian Institution scientists, analyzed the bones of Hawaiian petrels – birds that spend the majority of their lives foraging the open waters of the Pacific. They found that the substantial change in petrels’ eating habits, eating prey that are lower rather than higher in the food chain, coincides with the growth of industrialized fishing.
The birds’ dramatic shift in diet, shown in the current issue of the Proceedings of the National Academy of Sciences, leaves scientists pondering the fate of petrels as well as wondering how many other species face similar challenges.
‘Our bone record is alarming because it suggests that open-ocean food webs are changing on a large scale due to human influence,
Richard Smith, former editor of the British Medical Journal, has jested that instead of scientific peer review, its rival The Lancet had a system of throwing a pile of papers down the stairs and publishing those that reached the bottom. On another occasion, Smith was challenged to publish an issue of the BMJ exclusively comprising papers that had failed peer review and see if anybody noticed. He replied, ‘How do you know I haven’t already done it?
Antibiotic-resistant bacteria are now common in the meat aisles of American supermarkets. These so-called superbugs can trigger foodborne illness and infections that are hard to treat.
An analysis by the Environmental Working Group has determined that government tests of raw supermarket meat published last February 5 detected antibiotic-resistant bacteria in:
Detected Percents
These little-noticed tests, the most recent in a series conducted by the National Antimicrobial Resistance Monitoring System, a joint project of the federal Food and Drug Administration, Centers for Disease Control and Prevention and U.S. Department of Agriculture, found that supermarket meat samples collected in 2011 harbored significant amounts of the superbug versions of salmonella and Campylobacter, which together cause 3.6 million cases of food poisoning a year.
Moreover, the researchers found that some 53 percent of raw chicken samples collected in 2011 were tainted with an antibiotic-resistant form of Escherichia coli, or E. coli, a microbe that normally inhabits feces. Certain strains of E. coli can cause diarrhea, urinary tract infections and pneumonia. The extent of antibiotic-resistant E. coli on chicken is alarming because bacteria readily share antibiotic-resistance genes.
Not surprisingly, superbugs spawned by antibiotic misuse — and now pervasive in the meat Americans buy — have become a direct source of […]