Table T2.
Mole percentages of phospholipid fatty acids in sediment samples.
Section
169-1036A-2H-1
169-1036B-2H-1
169-1036B-2H-5
169-1036C-2H-5
169-1036C-3H-5
Normal
saturates (found in all bacteria):
16:0
33.7%
26.1%
15.3%
20.7%
20.2%
18:0
18.6%
13.1%
8.6%
14.3%
7.6%
Total normal
52.3%
39.3%
24.0%
35.0%
27.8%
Branched
saturates (typical of gram-positive and anaerobic bacteria):
i15:0
3.3%
4.6%
2.3%
4.7%
2.0%
a15:0
2.4%
4.0%
2.1%
4.0%
1.7%
i16:0
4.5%
0.0%
1.5%
6.6%
1.3%
i17:0
0.0%
0.0%
0.0%
3.2%
0.8%
a17:0
0.0%
0.0%
0.0%
0.0%
1.3%
Total branched
10.2%
8.6%
5.9%
18.5%
7.0%
Monounsaturates
(typical of gram-negative bacteria):
16:1w7c
5.5%
5.8%
6.3%
6.4%
4.1%
18:1w9c
4.3%
4.6%
3.4%
3.1%
2.5%
18:1w7c
7.5%
4.8%
7.4%
9.8%
6.6%
Total monounsaturates
17.3%
15.2%
17.1%
19.3%
13.2%
Cyclopropyl
fatty acids (in gram-negative bacteria, made in stationary phase):
cy17:0
2.5%
0.0%
0.0%
2.8%
0.8%
cy19:0
2.1%
3.5%
3.8%
4.3%
2.5%
Total cyclopropyl
4.5%
3.5%
3.8%
7.2%
3.3%
Long-chain
normal saturates, including very long-chain fatty acids:
21:0
2.1%
3.0%
2.8%
2.4%
2.7%
22:0
1.2%
3.6%
4.2%
2.2%
7.4%
23:0
1.2%
2.5%
2.9%
1.7%
3.9%
24:0
2.3%
3.3%
5.4%
1.7%
11.0%
25:0
1.2%
4.2%
3.4%
1.5%
3.4%
26:0
3.5%
6.8%
10.6%
3.4%
9.9%
27:0
1.2%
3.6%
3.5%
3.0%
2.0%
28:0
3.0%
6.4%
13.7%
4.2%
5.6%
29:0
0.0%
0.0%
2.7%
0.0%
0.8%
30:0
0.0%
0.0%
0.0%
0.0%
1.8%
Total long saturates
15.7%
33.5%
49.2%
20.0%
48.7%
Note: The most abundant PLFAs in Section 169-1036C-4H-5 were 16:0 (26%), 18:0 (37%), cy17:0 (28%), and a polyenoic 18-carbon PLFA (8%).