AOM	Anaerobic methane oxidation
a.s.l.	Above sea level
ASV	Amplicon sequence variant
DOC	Dissolved organic carbon
Eh	Redox potential
FeOB	Fe(II)-oxidizing bacteria
FeRB	Fe(III)-reducing bacteria
PERMANOVA	Permutational multivariate analysis of variance
RDA	Redundancy analysis
SpC	Specific conductance
TDS	Total dissolved solids