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Effect of emerging contaminants on soil microbial community composition, soil enzyme activity, and strawberry plant growth in polyethylene microplastic-containing soils
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Researchers found that emerging contaminants altered soil microbial community composition and enzyme activity, but these effects were suppressed when HDPE microplastics were also present in the soil, suggesting microplastics may modulate how soils respond to chemical contaminants.
Emerging contaminants were found to alter the soil microbial community composition. However, no changes were observed when these compounds were added to soil containing 100 mg kg −1 HDPE microplastics.
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[Effect of Microplastics and Phenanthrene on Soil Chemical Properties, Enzymatic Activities, and Microbial Communities].
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A 300-day experiment tested how polyethylene and polypropylene microplastics, alone and combined with the PAH pollutant phenanthrene, affected soil chemistry, enzyme activity, and microbial communities. The results showed that microplastics and phenanthrene interacted to reshape soil microbial composition and function in ways that neither contaminant produced alone, suggesting that co-contamination by microplastics and organic pollutants poses compounded risks to soil ecosystem health.
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Researchers studied how polyethylene microplastics at different concentrations affect soil microbial communities and overall ecosystem function in a maize growing system. They found that higher concentrations of microplastics shifted microbial community composition, reduced beneficial bacteria involved in nutrient cycling, and impaired multiple soil ecosystem functions simultaneously. The study suggests that microplastic contamination in agricultural soils can undermine the biological processes that support healthy crop growth.
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