Particulate geochemistry of selected springs and statistics relating analytes to Korarchaeota presence and abundance in selected Great Basin springsa.

aCarbon and nitrogen content are expressed as weight percent (wt. %), C and N isotopic compositions are expressed in permil (‰) relative to PDB and air standards, respectively. CInorg (wt. %) was calculated by difference (CInorg = Ctotal−Corg). Most particulate geochemistry measurements were made in triplicate; error values are ±1 standard deviation (S.D.); the errors reflect sample heterogeneity and, thus, are sometimes larger than the analytical uncertainty for these measurements (uncertainties are generally, Table S3.bAbundance is defined as O and M, which are “optimal”, >105 cells/g and “marginal”, 4 cells/g, respectively.*Result was significant for this particular test when corrected for multiple hypotheses using the Bonferroni correction (β = 0.05; n = 7).