Supporting information: Controls on methylmercury concentrations in lakes and streams of peatland-rich catchments along a 1700 km permafrost gradient

• Author(s) / Creator(s)

  • Lauren M Thompson
  • McKenzie A Kuhn
  • Johanna C Winder
  • Lucas PP Braga
  • Ryan HS Hutchins
  • Andrew J Tanentzap
  • Vincent L St. Louis
  • David Olefeldt

• Supporting information: "Controls on methylmercury concentrations in lakes and streams of peatland-rich catchments along a 1700 km permafrost gradient."

  Figure S1: Satellite imagery, hydrographs, and flowpaths of study regions; Figure S2: Regression of unfiltered MeHg and SUVA254; Figure S3: Principal component analysis of dissolved organic matter quality variables; Figure S4: Components identified by parallel factor analysis for measured excitation-emission spectra from the sampling sites; Figure S5: Regression of unfiltered MeHg and ratio of hgcA to 16S rRNA with groundwater indicators; Figure S6: Regression of merA with merB, and unfiltered MeHg with merB; Figure S7: Heat maps of water chemistry against identified clades with HgII methylating (hgcA), reducing (merA), and MeHg demethylating (merB) genes in lake sediments; Table S1. perANOVA analysis of Fe, pH, DOC, S, and EC separated by waterbody type and region; Table S2. perANOVA analysis of THg, MeHg, %MeHg separated by waterbody type and region; Table S3. Spectral composition of the five fluorescence compounds identified using parallel factor analysis; Table S4. perANOVA analysis on proportion of hgcA and merA to housekeeping gene 16S rRNA, separated by permafrost extent; Table S5. perMANOVA analysis on gene diversity in lake sediments, separated by permafrost extent; supporting data.

• Date created

  2022-12-05

• Subjects / Keywords

  • Data
  • Supplemental Information
  • Mercury
  • Dissolved organic matter
  • Surface waters
  • Soils
  • Permafrost

• Type of Item

  Research Material

• DOI

  https://doi.org/10.7939/r3-z2w3-p617

• License

  Attribution-NonCommercial 4.0 International