King George Island, the largest of the South Shetland Islands, lies 120km, about a day’s sail off the northernmost tip of Antarctica. It’s a rugged place – home to seals, penguins, a few scientific bases and not much else. Though the climate is mild compared to the mainland, temperatures still barely reach above freezing in the summer months and the island is almost entirely covered in ice. If microplastics can enter the food web here, they can probably do so almost anywhere on earth.
But this is exactly what colleagues and I discovered, when we searched for microplastics inside tiny creatures found on King George Island. Our results, now published in the Royal Society journal Biology Letters, show that microplastics are becoming an integral part of the soil food web. MORE
Header image: A particularly large collembolan (almost 2mm long) found in an oak forest in Ireland. Soil collembolan species are typically much smaller, paler, and might not have eyes. Together with microbes these animals help elements like nitrogen cycle between plants and soil. Credit: Tancredi Caruso, Author provided.