Researchers from the University of Gothenburg, Sweden, spend August in Sisimiut on the west coast of Greenland studying the prevalence of antibiotic resistance and the effects of antibiotic emissions on communities of bacteria living in marine sediments. More specifically, they were investigating how communities of bacteria in sediment and clay on the seabed are affected by exposure to antibiotics.
"We know very little about what happens to antibiotics that end up in the ocean, but several substances can accumulate in sediments where biodegradation occurs extremely slowly," says researcher Maria Granberg.
More than 10,000 tonnes of antibiotics are consumed in Europe each year, and 30-60% pass through animals and humans completely unchanged. The different substances then reach the ocean via hospitals, municipal sewage, fish farms and run-off from agriculture and landfills.
The research group from the University of Gothenburg are focusing on the potential effects of accumulating antibiotics in the seabed.
"Our aim is to document the sea's natural microbial structure and function as well as resistance patterns, so that we can determine if and in what way things change as a result of human activity," says Maria Granberg.
Greenland is home not only to areas of very clean water, the like of which just does not exist in Sweden, but also highly polluted water. As such, it is an excellent location for studying environmental impacts.
"Greenland has no sewage treatment whatsoever, which means that waste water from inhabited areas is discharged straight into the sea," says Maria Granberg. "So Greenland is home to both very clean and very polluted waters, which is great for comparing environmentally pristine areas with polluted ones."
The soft sediments on the seabed act as a reservoir for hard-to-break-down substances that are released into the environment. Even substances that are not discharged directly into
|Contact: Maria Granberg|
University of Gothenburg