Microplastics alter soil structure and microbial community composition

Environment International, Journal Year: 2024, Volume and Issue: 185, P. 108508 - 108508

Published: Feb. 16, 2024

Microplastics (MPs), including conventional hard-to-biodegrade petroleum-based and faster biodegradable plant-based ones, impact soil structure microbiota in turn affecting the biodiversity functions of terrestrial ecosystems. Herein, we investigated effects MPs on aggregate distribution microbial community composition microhabitats at scale. Two MP types (polyethylene (PE) polylactic acid (PLA) with increasing size (50, 150, 300 μm)) were mixed a silty loam (0–20 cm) ratio 0.5 % (w/w) rice–wheat rotation system greenhouse under 25 °C for one year. The aggregation, bacterial communities their co-occurrence networks as function size. Conventional generally had similar aggregation communities. They increased proportion microaggregates from 17 to 32 while reducing macroaggregates 84 68 %. stability decreased 1.4 mm 1.0–1.1 independently due decline binding agents (e.g., byproducts proteinaceous substances). type amount strongly affected structure, accounting approximately 54 variance. Due less bioavailable organics, within was more sensitive addition. Co-occurrence network analysis revealed that exacerbated competition among bacteria complexity networks. Such stronger PE than PLA higher persistence soils. Proteobacteria, Bacteroidetes, Chloroflexi, Actinobacteria, Gemmatimonadetes keystone taxa macroaggregates, Actinobacteria Chloroflexi microaggregates. most Overall, both reduced portion large stable aggregates, altering structures taxa.

Language: Английский

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Effect of conventional and biodegradable microplastics on the soil-soybean system: A perspective on rhizosphere microbial community and soil element cycling

Environment International, Journal Year: 2024, Volume and Issue: 190, P. 108781 - 108781

Published: May 28, 2024

As an exogenous carbon input, microplastics (MPs), especially biodegradable MPs, may significantly disrupt soil microbial communities and element cycling (CNPS cycling), but few studies have focused on this. Here, we assessing the effects of conventional low-density polyethylene (LDPE), polybutylene adipate terephthalate (PBAT), polylactic acid (PLA) MPs rhizosphere CNPS in a soil-soybean system. The results showed that PBAT-MPs PLA-MPs were more detrimental to soybean growth than LDPE-MPs, resulting reduction shoot nitrogen (14.05% 11.84%) biomass (33.80% 28.09%) at podding stage. In addition, dissolved organic (DOC) increased by 20.91% 66.59%, while nitrate (NO

Language: Английский

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Microplastic pollution promotes soil respiration: A global‐scale meta‐analysis

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(7)

Published: July 1, 2024

Abstract Microplastic (MP) pollution likely affects global soil carbon (C) dynamics, yet it remains uncertain how and to what extent MP influences respiration. Here, we report on a meta‐analysis determine the effects of microbiome CO 2 emission. We found that significantly increased contents organic C (SOC) (21%) dissolved (DOC) (12%), activity fluorescein diacetate hydrolase (FDAse) (10%), microbial biomass (17%), but led decrease in diversity (3%). In particular, increases components further promote emission (25%) from soil, with much higher effect MPs these emissions than biomass. The could be attributed opposite vs. diversity, as accumulation recruited some functionally important bacteria provided additional substrates for specific heterotrophic microorganisms, while inhibiting growth autotrophic taxa (e.g., Chloroflexi , Cyanobacteria ). This study reveals can increase by causing shifts microbiome. These results underscore potential importance plastic terrestrial fluxes, thus climate feedbacks.

Language: Английский

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Plastic food? Energy compensation of zebrafish (Danio rerio) after long-term exposure to polylactic acid biomicroplastics

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 466, P. 133604 - 133604

Published: Jan. 23, 2024

Language: Английский

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Higher potential leaching of inorganic and organic additives from biodegradable compared to conventional agricultural plastic mulch film

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 488, P. 137147 - 137147

Published: Jan. 7, 2025

Plastic mulch films support global food security, however, their composition and the potential release rates of organic, metal metalloid co-contaminants remains relatively unknown. This study evaluates low molecular weight organic additives, content leaching from density polyethylene (LDPE) biodegradable plastic films. We identified 59 non-intentionally added substances in new LDPE (39.8 mg m-2) 60 (129 m-2). The compounds high concern for ecosystem human health (e.g. phthalates, organophosphite antioxidants) was comparable to those (fatty acids, fatty amides, alkanols). However, majority leached have undergone no regulatory scrutiny environmental fate toxicity remain Leaching heavy metals (Cu, Zn, Pb) relative inert fillers (Ca, Na). higher both metal/metalloid additives (74.6 than (23.7 untargeted approach allowed assessment chemical burden posed individual farms, based on existing use patterns films, with coming raising pollution swapping. research emphasises need include complex mixture when assessing risks presented by balancing yield benefits protection our agricultural soils.

Language: Английский

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Effects of microplastics exposure on soil inorganic nitrogen: A comprehensive synthesis

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 460, P. 132514 - 132514

Published: Sept. 9, 2023

Language: Английский

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Microplastics in agriculture – a potential novel mechanism for the delivery of human pathogens onto crops

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: Aug. 10, 2023

Mulching with plastic sheeting, the use of carriers in seed coatings, and irrigation wastewater or contaminated surface water have resulted plastics, microplastics, becoming ubiquitous agricultural soils. Once environment, surfaces quickly become colonised by microbial biofilm comprised a diverse community. This so-called 'plastisphere' community can also include human pathogens, particularly if has been exposed to faecal contamination (e.g., from organic manures livestock faeces). The plastisphere is hypothesised facilitate survival dissemination therefore plastics systems could play significant role transferring pathogens crops, as microplastics adhering ready eat crops are difficult remove washing. In this paper we critically discuss pathways for associated interact crop leaves roots, potential transfer, adherence, uptake plants. Globally, concentration soils increasing, therefore, quantifying transfer into food chain needs be treated priority.

Language: Английский

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Sub-micron microplastics affect nitrogen cycling by altering microbial abundance and activities in a soil-legume system

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 460, P. 132504 - 132504

Published: Sept. 7, 2023

Recently, the environmental and agricultural impact of plastic waste has attracted considerable attention. Here, we investigated sub-micron polyethylene (PE) polypropylene (PP) microplastics (MPs) on nitrogen cycling, with emphasis bacterial abundance diversity in a soil-soybean (Glycine max) system. Exposure to soil containing MPs (50 500 mg kg-1) did not affect soybean growth, but significantly increased plant uptake, which was confirmed by activities nitrogenase glutamine synthetase root. Additionally, there an increase 16S gene copy number carbon substrate utilization, indicating activity rhizosphere microbial communities. Moreover, MP contamination affected taxonomic profile bacteria, especially symbiotic free-living bacteria involved cycling. Furthermore, qPCR analysis nitrogen-related genes Kyoto Encyclopedia Genes Genomes rRNA sequencing data revealed functional associated fixation nitrification. However, concentration polymer type have significant our Overall, these results provide insights into interactions between communities soil-legume

Language: Английский

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Increasing concentration of pure micro- and macro-LDPE and PP plastic negatively affect crop biomass, nutrient cycling, and microbial biomass

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 458, P. 131932 - 131932

Published: June 26, 2023

Over the last 50 years, intense use of agricultural plastic in form mulch films has led to an accumulation soil, creating a legacy fields. Plastic often contains additives, however it is still largely unknown how these compounds affect soil properties, potentially influencing or masking effects itself. Therefore, aim this study was investigate pure plastics varying sizes and concentrations, improve our understanding plastic-only interactions within soil-plant mesocosms. Maize (Zea mays L.) grown over eight weeks following addition micro macro low-density polyethylene polypropylene at increasing concentrations (equivalent 1, 10, 25, years film use) on key plant properties were measured. We found effect both microplastic health negligible short-term (1 <10 years). However, ≥ 10 application for types resulted clear negative growth microbial biomass. This provides vital insight into microplastics properties.

Language: Английский

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Impacts of Plastics on Plant Development: Recent Advances and Future Research Directions

Plants, Journal Year: 2023, Volume and Issue: 12(18), P. 3282 - 3282

Published: Sept. 15, 2023

Plastics have inundated the world, with microplastics (MPs) being small particles, less than 5 mm in size, originating from various sources. They pervade ecosystems such as freshwater and marine environments, soils, atmosphere. MPs, due to their size strong adsorption capacity, pose a threat plants by inhibiting seed germination, root elongation, nutrient absorption. The accumulation of MPs induces oxidative stress, cytotoxicity, genotoxicity plants, which also impacts plant development, mineral nutrition, photosynthesis, toxic accumulation, metabolite production tissues. Furthermore, roots can absorb nanoplastics (NPs), are then distributed stems, leaves, fruits. As NPs harm organisms ecosystems, they raise concerns about physical damage effects on animals, potential impact human health via food webs. Understanding environmental fate is essential, along strategies reduce release mitigate consequences. However, full understanding different plastics, whether traditional or biodegradable, development yet be achieved. This review offers an up-to-date overview latest known plastics plants.

Language: Английский

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