Pond Sediment Magnetite Grains Show a Distinctive Microbial Community

H. K. Song, S. Sonkaria, V. Khare, K. Dong, H. T. Lee, S. H. Ahn, H. K. Kim, Hojeong Kang, S. H. Lee, S. P. Jung, J. M. Adams

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Formation of magnetite in anaerobic sediments is thought to be enhanced by the activities of iron-reducing bacteria. Geobacter has been implicated as playing a major role, as in culture its cells are often associated with extracellular magnetite grains. We studied the bacterial community associated with magnetite grains in sediment of a freshwater pond in South Korea. Magnetite was isolated from the sediment using a magnet. The magnetite-depleted fraction of sediment was also taken for comparison. DNA was extracted from each set of samples, followed by PCR for 16S bacterial ribosomal RNA (rRNA) gene and HiSeq sequencing. The bacterial communities of the magnetite-enriched and magnetite-depleted fractions were significantly different. The enrichment of three abundant operational taxonomic units (OTUs) suggests that they may either be dependent upon the magnetite grain environment or may be playing a role in magnetite formation. The most abundant OTU in magnetite-enriched fractions was Geobacter, bolstering the case that this genus is important in magnetite formation in natural systems. Other major OTUs strongly associated with the magnetite-enriched fraction, rather than the magnetite-depleted fraction, include a Sulfuricella and a novel member of the Betaproteobacteria. The existence of distinct bacterial communities associated with particular mineral grain types may also be an example of niche separation and coexistence in sediments and soils, which cannot usually be detected due to difficulties in separating and concentrating minerals.

Original languageEnglish
Pages (from-to)168-174
Number of pages7
JournalMicrobial Ecology
Volume70
Issue number1
DOIs
Publication statusPublished - 2015 Jul 28

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magnetite
microbial communities
microbial community
pond
sediments
sediment
Geobacter
bacterial communities
iron-reducing bacterium
minerals
beta-Proteobacteria
anoxic sediment
South Korea
concentrating
mineral
coexistence
niche

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Soil Science

Cite this

Song, H. K., Sonkaria, S., Khare, V., Dong, K., Lee, H. T., Ahn, S. H., ... Adams, J. M. (2015). Pond Sediment Magnetite Grains Show a Distinctive Microbial Community. Microbial Ecology, 70(1), 168-174. https://doi.org/10.1007/s00248-014-0562-7
Song, H. K. ; Sonkaria, S. ; Khare, V. ; Dong, K. ; Lee, H. T. ; Ahn, S. H. ; Kim, H. K. ; Kang, Hojeong ; Lee, S. H. ; Jung, S. P. ; Adams, J. M. / Pond Sediment Magnetite Grains Show a Distinctive Microbial Community. In: Microbial Ecology. 2015 ; Vol. 70, No. 1. pp. 168-174.
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Song, HK, Sonkaria, S, Khare, V, Dong, K, Lee, HT, Ahn, SH, Kim, HK, Kang, H, Lee, SH, Jung, SP & Adams, JM 2015, 'Pond Sediment Magnetite Grains Show a Distinctive Microbial Community', Microbial Ecology, vol. 70, no. 1, pp. 168-174. https://doi.org/10.1007/s00248-014-0562-7

Pond Sediment Magnetite Grains Show a Distinctive Microbial Community. / Song, H. K.; Sonkaria, S.; Khare, V.; Dong, K.; Lee, H. T.; Ahn, S. H.; Kim, H. K.; Kang, Hojeong; Lee, S. H.; Jung, S. P.; Adams, J. M.

In: Microbial Ecology, Vol. 70, No. 1, 28.07.2015, p. 168-174.

Research output: Contribution to journalArticle

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Song HK, Sonkaria S, Khare V, Dong K, Lee HT, Ahn SH et al. Pond Sediment Magnetite Grains Show a Distinctive Microbial Community. Microbial Ecology. 2015 Jul 28;70(1):168-174. https://doi.org/10.1007/s00248-014-0562-7