{"id":32593,"date":"2014-12-12T11:42:00","date_gmt":"2014-12-12T11:42:00","guid":{"rendered":""},"modified":"2020-05-14T18:45:01","modified_gmt":"2020-05-14T18:45:01","slug":"7593-the-true-horror-of-the-damage-inflicted-by-plastic-waste-in-the-oceans","status":"publish","type":"post","link":"https:\/\/dialogue.earth\/en\/pollution\/7593-the-true-horror-of-the-damage-inflicted-by-plastic-waste-in-the-oceans\/","title":{"rendered":"The true horror of the damage inflicted by plastic waste in the oceans"},"content":{"rendered":"

There are at least 268,000 tonnes of plastic floating around in the oceans, according to new research<\/a> by a global team of scientists.<\/p>\n

The world generates 288m tonnes of plastic worldwide each year, just a little more than the annual vegetable crop<\/a>, yet using current methods only 0.1% of it is found at sea. The new research illustrates as much as anything, how little we know about the fate of plastic waste in the ocean once we have thrown it “away”.<\/p>\n

Where does it go? Most obviously, this discarded plastic exists as the unsightly debris we see washed ashore on our beaches.<\/p>\n

These large chunks of plastic are bad news for sea creatures which aren’t used to them. Turtles, for instance, consume plastic bags<\/a>, mistaking them for jellyfish. In Hawaii’s outer islands the Laysan albatross feeds material skimmed from the sea surface<\/a> to its chicks. Although adults can regurgitate ingested plastic, their chicks cannot. Young albatrosses are often found dead with stomachs full of bottle tops, lighters and other plastic debris, having starved to death.<\/p>\n

Infographic: How to move away from plastic dependency <\/strong><\/a><\/p>\n

But these big, visible impacts may just be the tip of the iceberg. Smaller plastic chunks less than 2.5mm across – broken down bits of larger debris – are ubiquitous in zooplankton samples from the eastern Pacific.<\/a> In some regions of the central Pacific there is now six times as much plankton-sized plastic are there is plankton. Plankton-eating birds, fish and whales have a tough time telling the two apart, often mistaking this plastic – especially tan coloured particles – for krill.<\/p>\n

Zooming in further However, even this doesn’t quite tell the whole story. For technical reasons Eriksen and his team weren’t able to consider the very smallest particles – but these may be the most harmful of all.<\/p>\n

We’re talking here about tiny lumps of 0.5mm across or considerably less, usually invisible to the naked eye, which often originate in cosmetics or drugs containing nanoparticles or microbeads. Such nanoparticles matter as they are similar size to the smallest forms of plankton (pico and nano plankton) which are the most abundant plankton group <\/a>and biggest contributors in terms of biomass and contribution to primary production. There’s a lot going on when you zoom right in.<\/p>\n

We don’t yet know precisely how plastic nanoparticles interact with marine fauna but we do know that they can be absorbed at the level of individual cells. And what’s worse is they’re very efficient carriers of organic molecules such as estradiol, the drug used for birth control and IVF that finds it way through our sewage system <\/a>into the sea. Indeed, this efficiency is one of the reasons nanoparticles are being explored for drug delivery<\/a> – they’re a great way to get the right medicine absorbed into the right cells.<\/p>\n

Therefore it isn’t just the plastic itself that should concern us. We need to look at what it’s carrying, as substances clinging to nanoparticles of plastic could badly damage marine ecosystems. Nasty endocrine disrupting chemicals<\/a> can be concentrated a million times more than background levels on the surfaces of plastic particles. These can then be ingested by organisms and the chemicals absorbed leading to disruption of the reproductive process – some species such as bivalve mussels<\/a> have even seen males turned into females.<\/p>\n

Floating chunks of plastic can also be colonised by organisms including potential bacterial pathogens such as cholera<\/a>, and marine insect sea skaters <\/a>which need a hard surface to lay their eggs on – plastic in the sea increases their numbers and range. The fact that floating plastic debris is novel and persists for longer than most natural flotsam could make them ideal vehicles<\/a> for the introduction of invasive species with potentially devastating consequences.<\/p>\n

Plastic pollution of the marine environment is the Cinderella of global issues, garnering less attention than its ugly sisters climate change, acidification, fisheries, invasive species or food waste but it has links to them all and merits greater attention by the scientific community.<\/p>\n

\nThis article was first published by ‘The Conversation’<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

New research has found the risks posed by roughly 5 trillion pieces of plastic floating around in the oceans goes far beyond killing seabirds<\/p>\n","protected":false},"author":1938,"featured_media":57713,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[760],"tags":[],"hashtags":[],"country":[],"class_list":["post-32593","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pollution"],"acf":[],"yoast_head":"\nThe true horror of the damage inflicted by plastic waste in the oceans | Dialogue Earth<\/title>\n<meta name=\"description\" content=\"New research has found the risks posed by roughly 5 trillion pieces of plastic floating around in the oceans goes far beyond killing seabirds\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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