Do Added Microplastics, Native Soil Properties, and Prevailing Climatic Conditions Have Consequences for Carbon and Nitrogen Contents in Soil? A Global Data Synthesis of Pot and Greenhouse Studies

Microplastics threaten soil ecosystems, strongly influencing carbon (C) and nitrogen (N) contents. Interactions between microplastic properties and climatic and edaphic factors are poorly understood. We conducted a meta-analysis to assess the interactive effects of microplastic properties (type, sha...

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Published in:Environmental science & technology 2024-05, Vol.58 (19), p.8464-8479
Main Authors: Iqbal, Shahid, Xu, Jianchu, Arif, Muhammad Saleem, Worthy, Fiona R., Jones, Davey L., Khan, Sehroon, Alharbi, Sulaiman Ali, Filimonenko, Ekaterina, Nadir, Sadia, Bu, Dengpan, Shakoor, Awais, Gui, Heng, Schaefer, Douglas Allen, Kuzyakov, Yakov
Format: Article
Language:English
Subjects:
aggregate stability
Alkaline soils
biodegradability
Biodegradation
Carbon
Carbon/nitrogen ratio
Climate change
Climatic conditions
Contamination
Degradability
Depletion
Dissolved organic carbon
environmental science
Greenhouses
Leaching
Low density polyethylenes
meta-analysis
Microplastics
Mineralization
Nitrogen
Nutrient loss
Occurrence, Fate, and Transport of Aquatic and Terrestrial Contaminants
Organic carbon
Organic soils
Plastic debris
Plastic pollution
polyethylene
Polylactic acid
Precipitation
Sandy soils
Soil contamination
soil organic carbon
Soil pollution
Soil properties
soil quality
Soil temperature
technology
temperature
texture
total nitrogen
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Summary:Microplastics threaten soil ecosystems, strongly influencing carbon (C) and nitrogen (N) contents. Interactions between microplastic properties and climatic and edaphic factors are poorly understood. We conducted a meta-analysis to assess the interactive effects of microplastic properties (type, shape, size, and content), native soil properties (texture, pH, and dissolved organic carbon (DOC)) and climatic factors (precipitation and temperature) on C and N contents in soil. We found that low-density polyethylene reduced total nitrogen (TN) content, whereas biodegradable polylactic acid led to a decrease in soil organic carbon (SOC). Microplastic fragments especially depleted TN, reducing aggregate stability, increasing N-mineralization and leaching, and consequently increasing the soil C/N ratio. Microplastic size affected outcomes; those
ISSN:0013-936X
1520-5851
1520-5851
DOI:10.1021/acs.est.3c10247