Table T1. Results of the microbiological analysis of black shale and reference samples of the Demerara Rise, ODP Leg 207.
Core
Depth
(mbsf)
Black
shale
AODC, total
prokaryotes
(N/cm3)
CARD-FISH
Living
bacteria
(N/cm3)
Living
archaea
207-1257C-
3R 105.7 No ND ND ND
12R 190.1 Yes ND ND ND
13R 200.2 Yes ND ND ND
16R 233.8 No ND ND ND
207-1258B-
42R 385.1 No ND ND ND
45R 399.2 Yes ND ND ND
46R 403.7 Yes ND ND ND
51R 427.8 Yes 1.9 x 107 3.0 x 105 Detected
52R 434.0 Yes ND ND ND
54R 444.5 Yes ND ND ND
55R 448.5 Yes ND ND ND
207-1259C-
8R 444.4 No ND ND ND
11R 494.5 Yes ND ND ND
16R 525.6 Yes ND ND ND
17R 529.2 Yes 8.7 x 106 4.7 x 105 Detected
207-1261B-
4R 553.7 No ND ND ND
6R 569.9 Yes ND ND ND
13R 643.0 Yes ND ND ND

Notes: AODC = acridine orange direct count, CARD-FISH = catalyzed reporter deposition–fluorescence in situ hybridization, ND = not detected. The detection limit was 5 x 104 cells/cm3 for minimum 100 fields of view observed.