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  • Marlis Reich
    University of Bremen
  • Antje Wichels
    Alfred Wegener Institute for Polar and Marine Research
  • Katrin Panzer
    University of BremenJacobs University Bremen
  • Evamaria Krause
    Carl von Ossietzky Universität, Oldenburg
  • Jose Gimenez Noya
  • Gunnar Gerdts
    Alfred Wegener Institute for Polar and Marine Research
Increases in atmospheric carbon dioxide (CO2) change ocean chemistry, as dissolved CO2 leads to a reduction in the seawater pH. Many marine taxa have been shown to be affected by ocean acidification; however information on marine fungi is lacking. We analyzed the effect of pH on mycoplankton communities. The pH of microcosms was adjusted to a value mimicking the predicted ocean acidification in the near future. Fungal communities were analyzed using a double-marker gene approach, allowing a more detailed analysis of their response using 454 pyrosequencing. Mycoplankton communities in microcosms with in situ and adjusted water pH values differed significantly in terms of structure and diversity. The differences were mainly abundance shifts among the dominant taxa, rather than the exclusion of fungal groups. A sensitivity to lower pH values was reported for several groups across the fungal kingdom and was not phylogenetically conserved. Some of the fungal species that dominated the communities of microcosms with a lower pH were known pathogenic fungi. With the increasing awareness of the significant role fungi play in marine systems, including performing a diverse range of symbiotic activities, our results highlight the importance of including fungi in further research projects studying and modeling biotic responses to the predicted ocean acidification.

Keywords

  • Ocean acidification, Marine fungi, Phylogenetic signals, 18S rRNA gene sequence, ITS, Microcosm, Double-marker gene approach
Original languageEnglish
Pages (from-to)221-233
JournalAquatic Microbial Ecology
Volume79
Issue number3
Early online date12 Jun 2017
DOIs
Publication statusPublished - 2017

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