Ocean Plastic Could Be Found in 99% of Seabird Species by 2050Newsroom
Humans are dumping so much plastic debris into the water that by 2050 nearly every single seabird species will have some of it in their gut, scientists predict.
In a study published Monday, researchers from the Commonwealth Scientific and Industrial Research Organisation (CSIRO) in Australia and Imperial College London analyzed studies dating to the early 1960s and used oceanographic and ecological modeling to predict the risk of plastic ingestion to 186 seabird species globally.
They found that nearly 60 percent of all seabird species have plastic in their gut, and that figure will rise to 99 percent by 2050, based on current trends. The risk is greatest at the southern boundary of the Indian, Pacific and Atlantic Oceans, a region thought to be relatively pristine, the researchers concluded.
The scientists estimate that 90 percent of all seabirds alive today — including albatross, shearwaters and penguins — have eaten plastic that has washed into the ocean from urban rivers, sewers and waste deposits. The plastic debris includes such things as bottle caps, bags and fibers from synthetic clothes.
A number of research centers around the world are studying the impact of plastic debris on the planet’s oceans and marine ecosystems. The US National Oceanic and Atmospheric Administration (NOAA) has observed that debris-carrying surface currents converge in areas like the Pacific to form vast spirals of ocean-circling currents known as “gyres.” The gyres concentrate marine debris just under the surface of the water, forming large nebula-like masses of plastic trash.
In the late 80s, researchers coined the term “Great Pacific Garbage Patch” to refer to the accumulation of plastic litter in the North Pacific ocean.
According to CSIRO, the largest concentrations of plastic debris are located in the Tasman sea, between Australia and New Zealand, and in the southwestern margin of the Indian Ocean.
“For the first time, we have a global prediction of how wide-reaching plastic impacts may be on marine species — and the results are striking,” Chris Wilcox, senior research scientist at CSIRO Oceans and Atmosphere, said in a statement.
“We predict, using historical observations, that 90 percent of individual seabirds have eaten plastic. This is a huge amount and really points to the ubiquity of plastic pollution.”
Wilcox carried out the study with co-authors Denise Hardesty and Erik van Sebille. It was published Monday in the journal Proceedings of the National Academy of Sciences.