Long-Term Fertilization History Alters Effects of Microplastics on Soil Properties, Microbial Communities, and Functions in Diverse Farmland Ecosystem

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 55(8), P. 4658 - 4668

Published: March 23, 2021

Microplastics (MPs) pollution has caused a threat to soil ecosystem diversity and functioning globally. Recently, an increasing number of studies have reported effects MPs on ecosystems. However, these mainly focused bacterial communities few limited functional genes, which is why ecosystems are still not fully understood. Fertilization treatment often coinsides with exposure in practice. Here, we studied environmentally relevant concentration polyethylene properties, microbial communities, functions under different types fertilization history. Our results showed that 0.2% PE could affect pH, but this effect varied according type Long-term history alter fungal diverse farmland (P < 0.05). Soil more sensitive than exposure. greater impact the lower genes abundance increases pathogenic microorganisms. These findings provided integrated picture aid our understanding histories.

Language: Английский

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Effects of microplastics and drought on soil ecosystem functions and multifunctionality

Journal of Applied Ecology, Journal Year: 2021, Volume and Issue: 58(5), P. 988 - 996

Published: Jan. 19, 2021

Abstract Microplastics in soils have become an important threat for terrestrial systems as they may potentially alter the geochemical/biophysical soil environment and can interact with drought. As microplastics affect water content, this could exacerbate well‐known negative effects of drought on ecosystem functionality. Thus, functions including litter decomposition, aggregation or those related nutrient cycling be altered. Despite potential interaction, we know relatively little about how microplastics, under different conditions, multifunctionality. To address gap, performed experiment using grassland plant communities growing microcosms. Microplastic fibres (absent, present) conditions (well‐watered, drought) were applied a fully factorial design. At harvest, measured to (β‐glucosaminidase, β‐D‐cellobiosidase, phosphatase, β‐glucosidase enzymes), respiration, retention, pH, decomposition (water stable aggregates). provide these simultaneously, also assessed multifunctionality, index that encompasses array here. We found interaction between microplastic affected Drought had negatively by decreasing enzymatic activities up ~39%, while increased ~18%, pH ~4% retention ~70% diminishing leaching. impacted enzymes, respiration but importantly, direction depended status. That is, well‐watered decreased ~34% similar values irrespective presence, tended increase microplastics. Litter contrary pattern increasing ~6% percentage Synthesis applications . Single positively depending However, our results suggest cause multifunctionality magnitude strategies counteract new global change factor are necessary.

Language: Английский

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A review on the occurrence and influence of biodegradable microplastics in soil ecosystems: Are biodegradable plastics substitute or threat?

Environment International, Journal Year: 2022, Volume and Issue: 163, P. 107244 - 107244

Published: April 12, 2022

Plastic products are widely used around the world, but waste plastic is not reasonably managed and causes serious pollution. Biodegradable plastics (BPs) provide an alternative to conventional plastics, all BPs can be completely degraded under natural conditions. Instead, they may break down into microplastics (MPs) faster than posing additional threat soil environment. In this paper, definition, applications, degradation behaviors of BPs, including biodegradable (BMPs), reviewed, we comprehensively summarized eco-toxicological effects BMPs in ecosystems, terms physical chemical properties soil, nutrient cycling, bacterial fungal communities, flora fauna. The compound other pollutants were also addressed. results revealed that made different or more severely compared MPs. Overall, review aims address gaps knowledge, shed light on ecological soil. a perfect substitute solve pollution, further exploration should focus their generation, environmental behavior, impact whether cause harm

Language: Английский

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Comparing the long-term responses of soil microbial structures and diversities to polyethylene microplastics in different aggregate fractions

Environment International, Journal Year: 2021, Volume and Issue: 149, P. 106398 - 106398

Published: Jan. 24, 2021

Microplastics (MPs) alter soil aggregation stability. However, studies have yet to determine whether these alterations further affect microbial community structures and diversities within different aggregates they influence the responses of MPs in aggregate fractions. In this study, long-term incubation experiments fractionation were combined investigate effects polyethylene microplastics (PE-MPs) on properties communities with particle sizes. Results showed that existence PE-MPs significantly reduced physicochemical aggregates, inhibited activities enzymes, changed richness diversity bacterial fungal communities. Such variations exerted notable differences levels. The response sensitivity bacteria silt clay fraction was higher than macroaggregate fraction, but fungi fraction. Relationships path analysis between after addition proposed. affected by directly indirectly influencing microenvironmental conditions. relative abundances Acidobacteria, Gemmatimonadetes, Bacteroides, Basidiomycota, Chtridiomyota, Glomeromycota correlated enzyme activities. Enzyme direct factors structures, (i.e., dissolved organic carbon, available phosphorus) could acting Our findings helped improve our understanding through perspective aggregates.

Language: Английский

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Inhibitory effect of microplastics on soil extracellular enzymatic activities by changing soil properties and direct adsorption: An investigation at the aggregate-fraction level

Environmental Pollution, Journal Year: 2020, Volume and Issue: 267, P. 115544 - 115544

Published: Aug. 28, 2020

Language: Английский

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