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Microplastics regulate soil microbial activities: Evidence from catalase, dehydrogenase, and fluorescein diacetate hydrolase

Environmental Research 2024 39 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 65 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Fayuan Wang Fayuan Wang Fayuan Wang Fayuan Wang Fayuan Wang Lanfang Han, Fayuan Wang Jiao Sun, Lanfang Han, Jiao Sun, Lanfang Han, Lanfang Han, Fayuan Wang Fayuan Wang Weitao Liu, Weitao Liu, Fayuan Wang Weitao Liu, Fayuan Wang Fayuan Wang Fayuan Wang Fayuan Wang Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Jiao Sun, Lanfang Han, Lanfang Han, Lanfang Han, Lanfang Han, Lanfang Han, Lanfang Han, Lanfang Han, Lanfang Han, Lanfang Han, Lanfang Han, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Fayuan Wang Weitao Liu, Fayuan Wang Yuanhong Ding, Fayuan Wang Fayuan Wang Fayuan Wang Fayuan Wang Fayuan Wang Fayuan Wang Fayuan Wang Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Weitao Liu, Lanfang Han, Lanfang Han, Lanfang Han, Lanfang Han, Lanfang Han, Lanfang Han, Lanfang Han, Jiao Sun, Yuanhong Ding, Weitao Liu, Fayuan Wang Lanfang Han, Fayuan Wang Fayuan Wang Weitao Liu, Weitao Liu, Jiao Sun, Fayuan Wang Weitao Liu, Fayuan Wang Lanfang Han, Lanfang Han, Fayuan Wang Yuanhong Ding, Lanfang Han, Lanfang Han, Fayuan Wang Fayuan Wang Fayuan Wang Weitao Liu, Fayuan Wang Yuanhong Ding, Lanfang Han, Lanfang Han, Weitao Liu, Fayuan Wang Fayuan Wang Lanfang Han, Fayuan Wang Lanfang Han, Fayuan Wang Fayuan Wang Weitao Liu, Fayuan Wang Jiao Sun, Fayuan Wang Fayuan Wang Weitao Liu, Weitao Liu, Fayuan Wang Fayuan Wang Weitao Liu, Weitao Liu, Fayuan Wang Fayuan Wang Weitao Liu, Lanfang Han, Weitao Liu, Fayuan Wang Weitao Liu, Lanfang Han, Weitao Liu, Fayuan Wang

Summary

This review examines how microplastics affect the activity of soil microorganisms, finding that results range widely from boosting to suppressing microbial function depending on the type, size, and age of the plastic, as well as soil conditions. Smaller nanoplastics can directly damage microbial cells, while larger microplastics alter soil chemistry and the toxicity of co-existing pollutants. Since soil microbes drive processes critical to agriculture and food production, these disruptions could have downstream effects on human food systems.

Body Systems

Reproductive

Soil microbiomes drive many soil processes and maintain the ecological functions of terrestrial ecosystems. Microplastics (MPs, size <5 mm) are pervasive emerging contaminants worldwide. However, how MPs affect soil microbial activity has not been well elucidated. This review article first highlights the effects of MPs on overall soil microbial activities represented by three soil enzymes, i.e., catalase, dehydrogenase, and fluorescein diacetate hydrolase (FDAse), and explores the underlying mechanisms and influencing factors. Abundant evidence confirms that MPs can change soil microbial activities. However, existing results vary greatly from inhibition to promotion and non-significance, depending on polymer type, degradability, dose, size, shape, additive, and aging degree of the target MPs, soil physicochemical and biological properties, and exposure conditions, such as exposure time, temperature, and agricultural practices (e.g., planting, fertilization, soil amendment, and pesticide application). MPs can directly affect microbial activities by acting as carbon sources, releasing additives and pollutants, and shaping microbial communities via plastisphere effects. Smaller MPs (e.g., nanoplastics, 1 to <1000 nm) can also damage microbial cells through penetration. Indirectly, MPs can change soil attributes, fertility, the toxicity of co-existing pollutants, and the performance of soil fauna and plants, thus regulating soil microbiomes and their activities. In conclusion, MPs can regulate soil microbial activities and consequently pose cascading consequences for ecosystem functioning.

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