TABLE 1.

PLFA analysis of Whipple Mountain rock varnish^a

Parameter (unit)	Value
Biomass (pmol PLFA g−1 dry weight)	31,253
Cells (g−1 dry weight)	6.25 × 108
% Gram negatives and firmicutes (terminally branched, saturated PLFA)	2.4
% Proteobacteria (monoenoic PLFA)	81.8
% Actinomycetes and sulfate-reducing bacteria (mid-chain branched, saturated PLFA)	2.3
% General (normal saturated PLFA)	13.0
% Eukaryotes (polyenoic PLFA)	0.5

^aPLFA signatures of anaerobic metal reducers were not observed (branched monosaturated PLFA); physiological status is nonstressed (cyclopropyl acid/cis acid ratios and trans/cis ratios were both 0.00).