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Microplastics shift soil carbon allocation toward mineral-associated fractions while increasing CO₂ emissions: a dual-level meta-analysis
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Researchers compiled primary and secondary effect-size datasets for a multi-level meta-analysis examining how microplastics shift soil carbon partitioning toward mineral-associated organic carbon fractions while simultaneously elevating CO2 emissions, providing a quantitative synthesis of microplastic impacts on terrestrial carbon cycling.
Effect-size datasets for a multi-level meta-analysis of microplastic effects on soil carbon pools, SOC fractions (POC, MAOC, MNC), and greenhouse gas emissions. Contains primary_meta_data.csv and secondary_meta_data.csv.
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Microplastics shift soil carbon allocation toward mineral-associated fractions while increasing CO₂ emissions: a dual-level meta-analysis
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Researchers compiled effect-size datasets for a multi-level meta-analysis examining how microplastics redistribute soil carbon between particulate and mineral-associated fractions while simultaneously increasing CO₂ emissions, providing primary and secondary data files to quantify these coupled effects on soil carbon cycling and greenhouse gas release.
Differential impacts of microplastics on carbon and nitrogen cycling in plant-soil systems: A meta-analysis
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A meta-analysis of 3,338 observations found that microplastics increased soil CO2 emissions by 25.7% but also boosted soil carbon storage through increases in total carbon (53.3%), soil organic carbon (25.4%), and microbial biomass carbon (19.6%). However, microplastics decreased plant aboveground biomass and reduced nitrate and ammonia volatilization, suggesting that while soil carbon sink capacity may increase, agricultural productivity could suffer.
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Tiny plastic bits in farm soil are messing with how soil stores carbon and releases CO2, changing soil chemistry in ways that could affect crop growth and soil health long-term. This matters because the food we eat grows in this soil, and disrupted soil health can ripple into food quality and our broader environment, even though direct human health impacts still need more research.
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This global meta-analysis pooled data from multiple studies and found that microplastic pollution in soil increased CO2 emissions by 25%. Microplastics boost certain soil microbes while reducing overall microbial diversity, changing how carbon cycles through the environment. While focused on soil health, this research shows how widespread microplastic pollution is reshaping ecosystems in ways that could ultimately affect climate and agriculture.
Microplastic effects on carbon cycling processes in soils
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Researchers reviewed how microplastics affect carbon cycling processes in soils, including their influence on microbial activity, plant growth, and litter decomposition. Since microplastics are themselves carbon-based materials, they can directly alter soil carbon stocks while also indirectly shifting microbial communities. The study calls for a major research effort to understand the widespread effects of microplastics on soil functioning and terrestrial ecosystem health.
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