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  11. Soil Moisture-dependent Tire Wear Particles Aging Processes Shift Soil Microbial Communities And Elevated Nitrous Oxide Emission On Drylands

Soil moisture-dependent tire wear particles aging processes shift soil microbial communities and elevated nitrous oxide emission on drylands

Qiao Xu1, Zhiyong Wu2, Zhihong Xu3

  • 1Key Laboratory of Urban Environment and Health, Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, People's Republic of China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, People's Republic of China.

The Science of the Total Environment
|September 2, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

Tire wear particles (TWPs) impact soil microbes differently based on moisture. TWP aging under wet or flooded conditions alters microbial communities and increases nitrous oxide (N2O) emissions from drylands.

Area of Science:

  • Environmental Science
  • Soil Science
  • Microbiology

Background:

  • Tire wear particles (TWPs) pose an emerging threat to soil ecosystems.
  • The effects of TWP aging on soil microbial communities, particularly under varying moisture conditions, are not well understood.

Purpose of the Study:

  • To investigate the dynamic responses of soil microbial communities to TWP aging under wet and flooded conditions.
  • To understand the impact of TWP aging on nitrous oxide (N2O) emissions and associated microbial and genetic changes in dryland soils.

Main Methods:

  • Analysis of soil microbial community structures (bacteria and fungi) under different TWP aging conditions (wet and flooded).
  • Quantification of N2O emissions from dryland soils.
  • Identification of TWP-biomarker taxa and analysis of genes involved in nitrogen cycling (amoA/B, nirS/K, nosZ).
Keywords:
N(2)O emissionSoil agingSoil microbial communitySoil moisture

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Main Results:

  • Distinct microbial community structures were observed under wet versus flooded conditions, with bacteria more sensitive to wet and fungi to flooded conditions.
  • The family Symbiobacteraceae and Brevibacillaceae were predominant in the TWP-sphere after 60 days.
  • TWP input significantly increased N2O emissions in dryland soils, with specific taxa (Cyanobacteriales, Blastocatellaceae, Pyrinomonadaceae) identified as TWP-biomarkers.
  • Responses of these taxa correlated with changes in key nitrogen cycling genes (amoA/B, nirS/K, nosZ).

Conclusions:

  • Soil moisture-dependent TWP aging significantly influences soil microbial communities.
  • TWP aging alters N2O emissions from dryland soils by modifying microbial communities and nitrogen cycling genes.
  • Understanding these interactions is crucial for assessing the environmental impact of TWPs.
Tire wear particles