Diatom blooms and associated vegetation shifts in a subarctic peatland: responses to distant volcanic eruptions?

  title={Diatom blooms and associated vegetation shifts in a subarctic peatland: responses to distant volcanic eruptions?},
  author={Ulla Kokfelt and Raimund Muscheler and Anette Mellstr{\"o}m and Eric Struyf and Mats Rundgren and Stefan Wasteg{\aa}rd and Dan Hammarlund},
  journal={Journal of Quaternary Science},
We test the hypothesis that rich occurrences of diatoms observed at transitions between major peat units representing different vegetation communities in a peat sequence from subarctic northern Sweden reflect responses to acid deposition from the Samalas AD 1257 and Laki AD 1783/1784 eruptions. We observe sudden changes in the mire ecosystem and thereby in the trophic status and biogeochemical cycling of the peatland. Both the eruptions are known to have been associated with significant acid… 



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