PMID- 36054230 OWN - NLM STAT- MEDLINE DCOM- 20231220 LR - 20231220 IS - 1462-2920 (Electronic) IS - 1462-2912 (Linking) VI - 25 IP - 12 DP - 2023 Dec TI - Biodegradation of microplastic in freshwaters: A long-lasting process affected by the lake microbiome. PG - 2669-2680 LID - 10.1111/1462-2920.16177 [doi] AB - Plastics have been produced for over a century, but definitive evidence of complete plastic biodegradation in different habitats, particularly freshwater ecosystems, is still missing. Using (13) C-labelled polyethylene microplastics (PE-MP) and stable isotope analysis of produced gas and microbial membrane lipids, we determined the biodegradation rate and fate of carbon in PE-MP in different freshwater types. The biodegradation rate in the humic-lake waters was much higher (0.45% +/- 0.21% per year) than in the clear-lake waters (0.07% +/- 0.06% per year) or the artificial freshwater medium (0.02% +/- 0.02% per year). Complete biodegradation of PE-MP was calculated to last 100-200 years in humic-lake waters, 300-4000 years in clear-lake waters, and 2000-20,000 years in the artificial freshwater medium. The concentration of 18:1omega7, characteristic phospholipid fatty acid in Alpha- and Gammaproteobacteria, was a predictor of faster biodegradation of PE. Uncultured Acetobacteraceae and Comamonadaceae among Alpha- and Gammaproteobacteria, respectively, were major bacteria related to the biodegradation of PE-MP. Overall, it appears that microorganisms in humic lakes with naturally occurring refractory polymers are more adept at decomposing PE than those in other waters. CI - (c) 2022 The Authors. Environmental Microbiology published by Society for Applied Microbiology and John Wiley & Sons Ltd. FAU - Taipale, Sami J AU - Taipale SJ AUID- ORCID: 0000-0001-7510-7337 AD - Department of Biological and Environmental Science, Nanoscience Center, University of Jyvaskyla, Jyvaskyla, Finland. FAU - Vesamaki, Jussi AU - Vesamaki J AUID- ORCID: 0000-0002-6662-6108 AD - Department of Biological and Environmental Science, Nanoscience Center, University of Jyvaskyla, Jyvaskyla, Finland. FAU - Kautonen, Petra AU - Kautonen P AD - Department of Biological and Environmental Science, Nanoscience Center, University of Jyvaskyla, Jyvaskyla, Finland. FAU - Kukkonen, Jussi V K AU - Kukkonen JVK AUID- ORCID: 0000-0003-3449-6828 AD - Department of Environmental and Biological Science, University of Eastern Finland, Finland. FAU - Biasi, Christina AU - Biasi C AUID- ORCID: 0000-0002-7413-3354 AD - Department of Environmental and Biological Science, University of Eastern Finland, Finland. FAU - Nissinen, Riitta AU - Nissinen R AUID- ORCID: 0000-0002-4604-6050 AD - Department of Biological and Environmental Science, Nanoscience Center, University of Jyvaskyla, Jyvaskyla, Finland. FAU - Tiirola, Marja AU - Tiirola M AUID- ORCID: 0000-0001-5589-3748 AD - Department of Biological and Environmental Science, Nanoscience Center, University of Jyvaskyla, Jyvaskyla, Finland. LA - eng GR - 615146/ERC_/European Research Council/International PT - Journal Article DEP - 20220828 PL - England TA - Environ Microbiol JT - Environmental microbiology JID - 100883692 RN - 0 (Microplastics) RN - 0 (Plastics) RN - 0 (Water Pollutants, Chemical) RN - 9002-88-4 (Polyethylene) SB - IM MH - *Microplastics MH - Lakes MH - Plastics MH - Ecosystem MH - *Water Pollutants, Chemical/analysis MH - Environmental Monitoring MH - Polyethylene EDAT- 2022/09/03 06:00 MHDA- 2023/12/20 06:42 CRDT- 2022/09/02 13:44 PHST- 2022/04/11 00:00 [received] PHST- 2022/08/11 00:00 [accepted] PHST- 2023/12/20 06:42 [medline] PHST- 2022/09/03 06:00 [pubmed] PHST- 2022/09/02 13:44 [entrez] AID - 10.1111/1462-2920.16177 [doi] PST - ppublish SO - Environ Microbiol. 2023 Dec;25(12):2669-2680. doi: 10.1111/1462-2920.16177. Epub 2022 Aug 28.