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COMPARISON OF BACTERIAL FLORA IN RIVER SEDIMENTS FROM FUKUSHIMA AND AOMORI PREFECTURES BY 16S RDNA SEQUENCE ANALYSIS.

K Yamanouchi1, T Tsujiguchi1, Y Shiroma1

  • 1Hirosaki University Graduate School of Health Sciences, Hirosaki, Japan.

Radiation Protection Dosimetry
|May 1, 2019
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Summary
This summary is machine-generated.

The Fukushima nuclear accident altered soil bacteria, decreasing Bacteroidetes while increasing Firmicutes and Latescibacteria. No radiation-resistant bacteria increase was found in Fukushima

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Area of Science:

  • Environmental microbiology
  • Radioecology
  • Molecular ecology

Background:

  • The 2011 Fukushima Daiichi Nuclear Power Plant accident released radioactive materials.
  • Limited research exists on the impact of radioactive contamination on forest soil and river bacteria.

Purpose of the Study:

  • To investigate the influence of radioactive contamination on bacterial communities in Fukushima river sediments.
  • To compare bacterial flora in Fukushima with a non-contaminated control site in Aomori prefecture.

Main Methods:

  • Amplicon sequencing of 16S rDNA was used to analyze bacterial composition.
  • River sediment soil samples were collected from Fukushima and Aomori prefectures.

Main Results:

  • Bacterial composition was similar at the phylum level between Fukushima and Aomori soils.
  • Fukushima soils showed significantly lower levels of Bacteroidetes (p = 0.014).
  • Fukushima soils exhibited significantly higher levels of Firmicutes (p = 0.001) and Latescibacteria (WS3) (p = 0.013).
  • No increase in radiation-resistant bacteria was detected in Fukushima soils.

Conclusions:

  • Radioactive contamination from the Fukushima nuclear accident has altered soil bacterial composition.
  • Specific bacterial groups like Bacteroidetes, Firmicutes, and Latescibacteria were significantly affected.
  • Further research requires standardized soil collection methods for accurate radioactive substance assessment.