Short-Term Changes in Marine Prokaryotic and Eukaryotic Microalgal Communities Exposed to the Leachate of a Seafloor Hydrothermal Sulfide

Shun Tsuboi, Haruyo Yamaguchi, Shigeshi Fuchida, Hiroshi Koshikawa, Masanobu Kawachi

Research output: Contribution to journalArticle

Abstract

The effects of increased mining of seafloor massive sulfide deposits on marine ecosystems have not been characterized. In this study, the impact of leaching metals from a hydrothermal sulfide on photosynthetic protist and cyanobacterial communities in marine environments was investigated by amplicon analyses of small subunit rDNA (SSU rDNA) and rRNA (SSU rRNA). Seawater samples collected from the Iheya North region and Suruga Bay, Japan, were incubated with or without a leachate containing zinc, copper, cadmium, and manganese, of the actual seafloor hydrothermal sulfide from the Hakurei site in the Izena Hole region. The relative abundances of prasinophytes, diatom protists, and the cyanobacteria Synechococcus decreased substantially during incubation with leachate, indicating the vulnerability of these lineages to the leachate. Phylogenetic analysis based on the cyanobacterial phycocyanin cpcBA/rpcBA operon obtained from samples incubated with or without leachate indicated that the individual lineages of Synechococcus can determine sensitivity to heavy metals in different marine regions as well as particular clades and ecotypes.

Original languageEnglish
Article number175
JournalWater, Air, and Soil Pollution
Volume230
Issue number8
DOIs
Publication statusPublished - 2019 Aug 1

Keywords

  • Heavy metals
  • Marine cyanobacteria
  • Marine eukaryotic microalgae
  • SSU rDNA
  • SSU rRNA
  • Seafloor massive sulfide deposit

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Ecological Modelling
  • Water Science and Technology
  • Pollution

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