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Increased methane production associated with community shifts towards Methanocella in paddy soils with the presence of nanoplastics
Summary
Researchers found that low-density polyethylene nanoplastics increased methane production in waterlogged paddy soils by shifting microbial communities toward specific methane-producing organisms. The study suggests that nanoplastic contamination in rice paddies could stimulate the breakdown of fatty acids and boost methane emissions, with implications for understanding carbon cycling and climate change.
The specific enrichment of Syntrophomonas and Methanocella indicates that LDPE NPs stimulate the syntrophic oxidation of LCFAs and SCFAs, with Methanocella acting as the hydrogenotrophic methanogen partner. Our findings enhance the understanding of how LDPE NPs affect the methanogenic community in waterlogged paddy soils. Given the importance of this ecosystem, our results are crucial for elucidating the mechanisms that govern carbon fluxes, which are highly relevant to global climate change.