A1 Refereed original research article in a scientific journal
Downward migrating microplastics in lake sediments are a tricky indicator for the onset of the Anthropocene
Authors: Dimante-Deimantovica Inta, Saarni Saija, Barone Marta, Buhhalko Natalja, Stivrins Normunds, Suhareva Natalija, Tylmann Wojciech, Vianello Alvise, Vollertsen Jes
Publisher: American Association for the Advancement of Science
Publication year: 2024
Journal: Science Advances
Journal name in source: Science Advances
Article number: eadi8136
Volume: 10
Issue: 8
eISSN: 2375-2548
DOI: https://doi.org/10.1126/sciadv.adi8136
Web address : https://www.science.org/doi/abs/10.1126/sciadv.adi8136
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/387112387
Plastics are a recent particulate material in Earth’s history. Because of plastics persistence and wide-range presence, it has a great potential of being a global age marker and correlation tool between sedimentary profiles. In this research, we query whether microplastics can be considered among the array of proxies to delimit the Anthropocene Epoch (starting from the year 1950 and above). We present a study of microplastics deposition history inferred from sediment profiles of lakes in northeastern Europe. The sediments were dated with independent proxies from the present back to the first half of the 18th century. Regardless of the sediment layer age, microplastic particles were found throughout the cores in all sites. Depending on particles’ aspect ratio, less elongated particles were found deeper, while more elongated particles and fibers have reduced mobility. We conclude that interpretation of microplastics distribution in the studied sediment profiles is ambiguous and does not strictly indicate the beginning of the Anthropocene Epoch. The epoch of humans—Anthropocene—cannot be precisely defined with microplastic pollution records.
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