Table T2.
Percentage of major diatom species, actual number of diatoms counted in each sample, and diatom abundance.
Depth (mbsf)
Diatom species
(%)
Diatoms counted
(number/sample)
Abundance (millions of valves/g sediment)
Fragilariopsis kerguelensis
Fragilariopsis angulata
Thalassionema and
Thalassiothrix
Fragilariopsis curta and
Fragilariopsis cylindrus
other Fragilariopsis,
pennates
Fragilariopsis ritscheri and
Fragilariopsis obliquecostata
Fragilariopsis separanda
Chaetoceros:
vegetative and other
Fragilariopsis cylindrus
Thalassiosira spp.
Fragilariopsis spp.
Rhizosolenia spp.
Other species
Freshwater diatoms
Benthic diatoms
Counted
FOV
Diatoms
Chaetoceros
3.10
11.5
*
1.0
76.0
3.5
5.5
2.5
3
7.5
7
3.5
1
2
1
0
177.0
10
573.3
492.3
3.24
12.6
*
1.0
64.7
9.2
11.1
1.4
3
2.5
4
2.0
7
1
0
0
213.5
10
644.9
586.0
3.40
45.5
*
3.0
24.8
8.9
14.9
3.0
0
0.5
5
5.5
1
1
0
0
57.0
10
182.7
141.0
3.49
27.4
*
2.7
45.3
7.2
11.7
5.8
3
3.5
7
4.0
3
1
0
0
99.5
10
332.5
260.7
3.67
36.0
*
1.9
31.8
16.1
14.2
0.0
2
1.5
6
0.5
1
1
0
1
101.0
10
296.5
258.3
3.79
37.7
*
3.9
33.3
13.5
10.1
1.4
2
1.5
4
2.0
0
1
0
1
79.5
10
242.5
207.4
3.85
17.9
*
2.7
54.0
6.3
7.6
11.6
5
6.0
6
2.0
1
0
0
0
168.0
10
522.6
460.4
3.88
16.5
3.0
2.0
59.0
4.0
12.5
3.0
2
3.0
1
1.0
1
1
0
1
114.0
10
337.9
308.3
3.91
21.1
3.3
1.0
48.8
8.6
10.5
6.7
1
4.0
1
4.0
0
2
0
1
125.0
10
413.4
370.4
3.94
26.7
2.4
0.0
60.2
4.4
4.4
1.9
4
6.5
13
2.0
2
1
0
2
176.5
10
577.6
477.8
4.23
26.0
4.0
2.6
43.6
6.6
16.7
0.4
0
4.0
5
0.5
4
2
0
1
68.5
10
199.2
151.2
4.26
29.8
11.2
2.4
32.2
14.1
6.3
3.9
1
0.0
7
4.0
2
0
1
0
69.0
10
212.5
166.3
6.15
24.0
5.1
5.5
45.2
1.8
10.1
8.3
1
0.0
2
1.0
0
1
0
0
93.0
10
278.3
263.3
6.25
22.1
7.2
1.0
44.2
1.0
17.8
6.7
0
11.0
4
4.0
0
3
0
1
133.0
10
390.5
323.0
6.40
34.5
3.4
3.0
31.5
2.0
21.2
4.4
1
3.5
5
3.0
4
0
0
1
59.5
10
196.8
138.9
6.50
ND
ND
ND
ND
ND
ND
ND
2
3.5
5
4.5
1
1
0
0
243.0
10
ND
ND
6.70
26.7
3.3
3.7
51.0
4.1
6.2
4.9
0
5.5
3
6.0
0
1
0
0
127.5
10
404.6
355.4
6.80
25.2
5.6
0.0
34.0
4.8
24.8
5.6
2
1.0
3
6.0
3
1
0
0
126.0
10
388.1
338.8
6.95
35.2
4.1
1.4
39.3
2.3
10.0
7.8
2
4.5
2
0.5
2
0
0
0
115.0
10
176.3
340.3
7.10
33.2
8.4
5.0
24.4
1.3
22.3
5.5
0
4.0
6
4.5
0
4
0
0
108.5
10
315.6
261.8
7.60
2.1
0.2
0.3
94.9
0.0
1.8
0.7
47
6.0
4
2.5
0
2
0
2
263.5
10
796.0
604.2
7.70
23.0
7.8
1.4
42.4
7.8
15.7
1.8
3
4.0
5
4.5
1
1
0
0
100.5
10
306.5
250.1
14.46
51.7
10.4
1.0
4.5
6.5
11.9
13.9
2
3.0
1
2.5
2
0
0
0
138.5
10
435.1
402.1
14.91
34.6
12.0
1.9
33.7
5.8
7.2
4.8
3
8.0
7
3.5
1
1
0
0
251.5
10
797.1
722.6
15.03
44.9
7.8
0.5
33.2
3.4
6.8
3.4
1
1.5
0
2.0
0
0
0
0
162.5
10
526.3
511.7
15.15
37.4
1.0
3.0
37.9
3.9
9.9
6.9
4
2.0
5
4.5
1
1
0
0
171.5
10
523.1
469.7
15.27
45.7
6.2
1.9
27.1
6.2
9.0
3.8
1
2.0
3
6.5
0
1
0
0
191.5
10
589.8
548.2
15.51
46.5
3.5
2.0
27.7
2.0
11.9
6.4
1
3.0
8
6.5
0
1
0
0
249.5
10
783.8
722.5
15.78
52.0
5.0
1.5
19.3
3.0
14.4
5.0
4
1.0
2
2.5
0
1
0
0
408.5
10
1365.3
1330.2
23.49
43.3
8.5
2.2
34.8
1.3
6.3
3.6
3
2.0
0
2.5
1
0
0
1
331.5
10
991.8
963.4
23.70
49.5
9.0
1.9
21.2
4.2
9.9
4.2
1
2.0
4
4.0
1
1
0
0
101.0
10
317.3
276.5
23.79
44.1
7.1
0.9
39.3
0.9
5.2
2.4
0
1.0
4
2.0
2
1
0
2
214.0
10
665.6
628.2
23.82
41.3
10.9
3.0
32.8
2.0
9.0
1.0
1
2.5
3
3.5
2
2
0
0
124.0
10
360.7
320.0
23.91
44.5
8.3
3.2
30.3
4.6
7.3
1.8
2
3.0
3
1.5
2
0
0
0
41.5
10
124.2
89.8
23.94
35.3
13.7
1.5
33.8
5.9
9.8
0.0
0
1.0
1
1.0
0
1
1
0
77.0
10
246.8
230.8
23.97
40.1
8.0
1.4
27.4
6.1
12.3
4.7
0
1.0
4
4.0
0
2
0
0
115.0
10
334.5
302.5
24.00
56.2
6.0
1.4
15.7
9.7
8.3
2.8
1
2.0
0
4.0
1
2
0
0
56.0
10
164.4
135.0
24.06
50.9
10.1
1.4
21.1
6.9
8.3
1.4
1
0.5
3
5.0
2
2
0
0
57.5
10
178.9
136.9
Notes: * = Fragilariopsis angulata counted with Fragilariopsis kerguelensis, FOV = fields of view, ND = no data.