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  11. Prevalence And Dynamics Of Antimicrobial Resistance In Pioneer And Developing Arctic Soils

Prevalence and dynamics of antimicrobial resistance in pioneer and developing Arctic soils

Shamik Roy1, Robin A Dawson1, James A Bradley2,3

  • 1School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ, UK.

BMC Microbiology
|January 28, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Antimicrobial resistance (AMR) increases with soil age in Arctic ecosystems, driven by microbial competition. However, soil organic matter also influences this spread, suggesting complex regulatory factors over time.

Area of Science:

  • Environmental microbiology
  • Soil science
  • Ecosystem dynamics

Background:

  • Antimicrobial resistance (AMR) is ancient and widespread in terrestrial ecosystems.
  • Natural processes governing the temporal spread of soil AMR remain poorly understood.

Purpose of the Study:

  • To investigate how AMR, including antibiotic resistance genes (ARGs), mobile genetic elements (MGEs), and antibiotic-resistant bacteria (ARB), varies with soil age in Arctic environments.
  • To determine the influence of soil development stages on AMR magnitude and spread using a space-for-time substitution.

Main Methods:

  • Utilized a space-for-time approach in recently deglaciated pioneer and developing Arctic soils.
  • Assessed the abundance and distribution of ARGs, MGEs, and ARB across different soil development stages.
Keywords:
Antimicrobial resistanceArctic soilsMetagenomicsMicroorganisms

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Main Results:

  • ARGs, MGEs, and ARB were present and unevenly distributed in developing Arctic soils.
  • The abundance of ARGs, MGEs, and ARB generally increased with soil age, but at varying rates across glacier forefields.
  • A positive correlation was found between soil age and ARG/ARB abundance, attributed to increased microbial competition.
  • Soil organic matter showed a negative relationship with ARG diversity, indicating facilitation via nutrient limitation alleviation.

Conclusions:

  • Both microbial competition and facilitation play roles in regulating AMR spread over time in Arctic soils.
  • Microbial competition appears to be a more dominant factor in determining the spread of AMR in these environments.
Soil development