Plastics Pose A Threat To Sea Life Right Now

It has long been held that plastic waste, when dumped in the sea, posed more of a risk to careless swimmers as a bludgeoning hazard than it did to aquatic life as a pollutant. The received wisdom was that plastics were hardy materials likely to release their contaminants over time. Now, according to new research from scientists presenting to the American Chemical Society (ACS), it seems that that is not the case. It may well be, in fact, that plastics break down with ease and speed in our oceans, and are posing a threat to sea life right now.

It is well known by anyone who has seen footage of “Beaches from Hell” that often waste thrown in the ocean will wash up on the beach. This may not be desirable, but the fact that it was at least visible brought some strange comfort, at least to those of us who could ignore that the beach itself was an ecosystem all of its own. However, it is fair to say that a more than significant amount of plastic waste thrown into the sea never finds its way to the shore. Some stays in the ocean and interferes with marine life directly – as anyone who has ever tried to free a fish or a seagull from a plastic bag can attest – and a lot of it, we can now say without fear of contradiction, breaks down while in the ocean, releasing toxins that do their own brand of harm to the marine population.

Famously, the expanse of water between Hawaii and California has become known as the “Great Pacific Garbage Patch”. What is less well-known is a little statistic which states that the area is twice the size of Texas. Think of how much marine life finds its home in that area, and consider then that the water is not just polluted by bottles, bags and other detritus, but by the component parts of that detritus. Although not as viscerally horrible as the Exxon Valdez oil spill, this is a major problem and will require attention. While we have always assumed plastic in the ocean to be undesirable, now we find the true extent of how much this is the case.

It emerges that plastic when thrown into the ocean reacts extremely badly as it is exposed to the rain and the sun while already weakened by the saltwater in the ocean. The contamination caused by this has an immediately obvious negative effect – poisoning marine life – but the secondary effects it can have by entering the food chain are no less concerning. At the moment we do not know what shape the effects could take, but previous studies in animals have demonstrated that Bisphenol A – a major constituent of many plastics – can disrupt animal hormone systems. Although it would be unwise and unhelpful to become too apocalyptic in our vision of the effects this could have, it bears attention and reminds us that vigilance is vitally important. The consequences of ignorance could yet be very damaging.

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This entry was posted on Sunday, August 23rd, 2009 at 11:03 pm and is filed under Environment, Featured. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.