Microbial Communities Promoting Mn(II) Oxidation in Ashumet Pond, a Historically Polluted Freshwater Pond Undergoing Remediation

Cara M. Santelli, Dominique L. Chaput, Colleen M. Hansel

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

An extensive culture-dependent and -independent study was conducted to identify microorganisms contributing to the biogeochemical cycling of manganese (Mn) in Ashumet Pond, a freshwater pond in Massachusetts currently undergoing remediation. A variety of bacteria (including Gamma-, Beta-, and Alpha-proteobacteria, Firmicutes, and Bacteroides) and Ascoymete fungi were isolated from the pond that promote Mn(II) oxidation and subsequent formation of Mn(III/IV) oxide minerals. Targeted-amplicon pyrosequencing of the bacterial and fungal communities associated with Mn oxide-encrusted samples show a highly diverse microbial community, of which the cultured phylotypes represent a minor proportion. This suggests a larger community, not identified through culturing, contributes to Mn oxide formation within the Pond. © 2014

Original languageEnglish (US)
Pages (from-to)605-616
Number of pages12
JournalGeomicrobiology Journal
Volume31
Issue number7
DOIs
StatePublished - Aug 2014
Externally publishedYes

Keywords

  • biogeochemical cycling
  • biomineralization
  • bioremediation
  • community structure
  • molecular ecology

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