TABLE 2.

FISH cell area abundances and geochemical data for Acquasanta cave stream biofilm samples

SampleDate collectedPercent hybridization by each FISH probeaTemp °CpHSp. cond.b (mS/cm)SO42− (mM)O2 (aq) (μM)H2S (aq) (μM)H2S (g)c (ppm)
EUBMIXEP404GAM42aDELTA495aSRB385
AS05-318/08/2001+++++++++++++++++40.46.378.4NMNMNMNM
AS05-218/08/2001+++++++++++++++NM40.46.378.4NMNMNMNM
AS07-631/05/2003+++++++++++++++NM44.16.3810.69.923.06801100
AS07-731/05/2003+++++++++++++++++44.16.3810.69.923.06801100
AS08-213/06/2004++++++++++++++++42.76.3110.512.716.6941515
AS08-313/06/2004++++++++++++++NM42.76.3110.512.716.6941515
  • a Estimated proportion of total cells. ND, none detected; +, <3%; ++, 3 to 15%; +++, 15 to 35%; ++++, 35 to 75%; ++++, 75 to 100%; NM, not measured. No ARCH915-positive cells were detected.

  • b Sp. cond., specific conductance.

  • c Measured 1.5 m above the cave stream. g, gas.