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[Effects of Enzyme Activities and Metabolomics of Wheat Rhizosphere Soil Under Biodegradable Microplastics].
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Even "biodegradable" plastics may not be as harmless to soil as we think: this study found that when these plastics break down in soil around wheat roots, they change soil chemistry and disrupt the activity of enzymes that plants and soil microbes rely on to stay healthy. Since wheat is a staple food crop, changes to soil health could eventually affect crop quality and the safety of our food supply, making this an early warning sign worth watching as biodegradable plastics become more common.
= 0.777）. This study provides foundational data and theoretical insights for assessing the potential ecological risks of PLA-MPs in soil ecosystems.
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[Effects of Polylactic Acid Microplastics （PLA-MPs） on Physicochemical Properties and Microbial Communities of Wheat Rhizosphere Soil].
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Researchers investigated how polylactic acid microplastics affect wheat rhizosphere soil and found that they significantly altered soil chemistry, increasing phosphorus and organic matter while decreasing total nitrogen and pH. The microplastics also reduced the richness and diversity of soil microorganisms, with larger particles and higher concentrations causing the greatest disruption. The study suggests that even biodegradable plastics can meaningfully reshape soil microbial communities and nutrient cycling in agricultural settings.
Biodegradable microplastic type and wheat-straw addition shape soil CO₂ emissions: links to dissolved organic matter turnover and microbial carbon allocation
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Scientists studying "biodegradable" plastics (marketed as eco-friendly alternatives to regular plastic) found that these materials don't just disappear harmlessly in soil, they actually change how soil bacteria break down organic matter and release CO₂, especially when mixed with crop leftovers like wheat straw. This matters because it shows that switching to biodegradable plastics isn't automatically better for the environment; it can alter soil health and carbon cycling in ways we're still working to understand, which has ripple effects on the food we grow and the climate we all depend on.
Unravelling the ecological ramifications of biodegradable microplastics in soil environment: A systematic review
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Researchers reviewed 85 studies on biodegradable microplastics in soil, finding that when biodegradable plastics fail to fully break down they can disrupt soil structure, nutrient cycling, and microbial life in ways that depend heavily on concentration and plastic type. The review highlights that "biodegradable" plastics are not a simple fix for microplastic pollution in agricultural soils.
Microplastics affect ecosystem multifunctionality: Increasing evidence from soil enzyme activities
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This review examines how microplastics alter the activity of soil enzymes that are essential for nutrient cycling, decomposition, and carbon regulation. Biodegradable microplastics generally caused more pronounced effects than conventional plastics, and the changes in enzyme activity could ultimately affect soil fertility and the nutritional quality of crops grown for human consumption.
When "biodegradable" is not benign: Microplastic-driven disruption of soil processes and plant-microbe interactions
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Researchers reviewed evidence that biodegradable microplastics persist long enough in soil to meaningfully alter aggregate structure, enzyme activity, and microbial community composition, proposing a mechanistic framework in which polymer chemistry, aging-driven surface changes, and rhizosphere dynamics jointly determine ecological outcomes — and concluding that biodegradability should not be equated with environmental safety.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.