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.