Sixth Ocean Garbage Patch Invading the Arctic
Credit: Image courtesy of Alfred Wegener Institute, Helmholtz Centre for Polar and Marine
Research Northern gannet use old fishing nets as nesting material
in their nesting colony at the North Sea island of Helgoland.
Plastics don't break down, rather large pieces of plastic deconstruct into smaller pieces of plastic, microscopic in size that are consumed by fish from sardines to whales, and by sea birds.
This is not good. These marine animals form the very basis of the food chain that we rely on for our daily bread. The consumption of microscopic fragments of plastics by sea life that contain no food value and block the absorption of nutrients threatens our existence. Combine this with over-fishing, and well, you get the picture.
For any author or screenwriter, any decline in human food stocks offers a plot element of immense importance as wars and revolutions are caused by lack of food. We live in a world today sharply divided between the haves, mostly us, and the have-nots as evidenced by the current immigrant crisis in Europe. Don't kid yourself. People move for opportunity such as to obtain enough to eat.
Think it's bad now? It's only going to get worse as the world's population continues to grow exponentially and local food production fails to provide enough to eat - including from fishing. Some experts posit that the growth of pirates around the world is due to fisherman having nothing to harvest from the ocean so they pick up any method they can to feed their families.
Here's the story with a link to the full report in the attribution.
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Plastic litter taints the sea surface, even in the Arctic
For the first time, researchers survey litter on sea surface at such high latitudes
In a new study, researchers from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) show for the first time that marine litter can even be found at the sea surface of Arctic waters. Though it remains unclear how the litter made it so far north, it is likely to pose new problems for local marine life, the authors report on the online portal of the scientific journal Polar Biology. Plastic has already been reported from stomachs of resident seabirds and Greenland sharks.
Plastic waste finds its way into the ocean, and from there to the farthest reaches of the planet -- even as far as the Arctic. This was confirmed in one of the first litter surveys conducted north of the Arctic Circle, carried out by an international research team from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) and Belgium's Laboratory for Polar Ecology. The researchers presented their results in an article released on the online portal of the journal Polar Biology.
In order to gauge the level of pollution, the researchers took advantage of an expedition that brought the research icebreaker Polarstern to the Fram Strait, the area between East Greenland and Svalbard. In July 2012, AWI biologist Dr Melanie Bergmann and her team searched for litter floating on the sea surface from the ship's bridge and by helicopter, maintaining a "litter watch" for a combined distance of 5,600 kilometres. "We found a total of 31 pieces of litter," reports Bergmann.
Although this number may sound low, it confirms that there is indeed litter floating in the remote Arctic Ocean. "Since we conducted our surveys from the bridge, 18 metres above sea level, and from a helicopter, we were only able to spot the larger pieces of litter. Therefore, our numbers are probably an underestimate," the marine biologist explains. It is well-known that, with time, plastic breaks down into small fragments at sea, which can only be detected properly by analysis of net tows.
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We currently know of five garbage patches worldwide; the sixth patch in the Barents Sea is most likely in the early stages of formation. Bergmann believes it may be fed by the densely populated coastal regions of Northern Europe. "It is conceivable that part of that litter then drifts even farther to the north and northwest, and reaches the Fram Strait," states the AWI biologist, adding, "Another cause for litter in the Arctic could be the retreat of the Arctic sea ice. As a result more and more cruise liners and fish trawlers are operating further north, following the cod. Most likely, litter from the ships intentionally or accidentally ends up in the waters of the Arctic. We expect this trend to continue."
In a previous study, Melanie Bergmann analysed photographs from the deep Arctic seafloor for signs of plastic, glass and other types of litter. Her conclusion: in the time frame of ten years the amount of litter in the deep sea has doubled with densities in a similar range to those from southern Europe. In fact, the litter density on the deep seafloor of the Fram Strait is 10 to 100 times higher than at the sea surface. "On the deep Arctic seafloor, we found an average of 2.2 to 18.4 pieces of litter per kilometre of our route. This indicates that the deep seafloor may be the ultimate sink for marine litter," Bergmann suggests.
The litter floating in the Arctic is particularly detrimental to seabirds, which feed at the sea surface. A recent study from the nearby Isfjorden fjord on Spitsbergen showed that 88 percent of the northern fulmars examined had swallowed plastic. These birds spend their entire life at sea. Even Greenland sharks are swallowing plastic litter: researchers found plastic litter in the stomachs of up to eight percent of the sharks caught south of Greenland.
Bergmann notes that the litter data for her latest study were collected in the course of a study on marine mammals and seabirds on board of RV Polarstern: "We just took advantage of these surveys to count marine litter." Scientists refer to chances such as this one, where valuable scientific data is gathered during expeditions of a different purpose, as "ships of opportunity." "Since it's reasonably easy to count litter from a ship in motion, it makes sense to use 'ships of opportunity' more often in the future to help us to learn more about the global distribution of floating litter, especially in remote areas. This could be done during patrol flights and voyages with research ships, cruise ships, coast guard, merchant and fishing vessels," adds Bergmann.
Story Source: Materials provided by Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research. Melanie Bergmann, Nadja Sandhop, Ingo Schewe, Diederik D’Hert. Observations of floating anthropogenic litter in the Barents Sea and Fram Strait, Arctic. Polar Biology, 2015