. FALKLAND Is. D< â¡ I â¡ 100, I ,000 â¡ uviiT of -^ 4? s& 1Z& &J â¡ â IV â¢Â°Â«1 ORG IA :V, SO' 45° Fig. 25. Distribution of Rhizosoknia styliformis at stations between South Georgia and the Falkland Islands, February 1927. The values shown at the seven points immediately around South Georgia represent average values for the stations on the seven radiating lines. Negative observations shown as dots. Chaetoceros. Twelve species of this genus were recorded. Ch. atlanticus, Cleve, was important at o
. FALKLAND Is. D< â¡ I â¡ 100, I ,000 â¡ uviiT of -^ 4? s& 1Z& &J â¡ â IV â¢Â°Â«1 ORG IA :V, SO' 45° Fig. 25. Distribution of Rhizosoknia styliformis at stations between South Georgia and the Falkland Islands, February 1927. The values shown at the seven points immediately around South Georgia represent average values for the stations on the seven radiating lines. Negative observations shown as dots. Chaetoceros. Twelve species of this genus were recorded. Ch. atlanticus, Cleve, was important at only a few stations: notably at St. 161 where over six million were taken. Its distribution is shown in Appendix I. Ch. castracanei, Karsten, was also taken in large numbers at St. 161, 444,000 (74) and nearer South Georgia only on the eastern and southern side, in water of Weddell Sea origin: St. 137, 22,800 (38); St. 138, 600 (6); WS 34, 17,000 (17); WS 36, 5400 (18) and WS 37, 800 (4). Ch. criophilam, Castr., was one of the more important diatoms in the survey occurring on all sides of the island. Its distribution is shown in Appendix I and Fig. 26. Mangin (1917) has shown that this species is quite distinct from Ch. criophilum, Gran, a northern diatom, which he has renamed Ch. concavicornis. Ch. cruciatus, Karsten, was found at only two stations on the west side of the island: WS 40, 198,000 (33) and WS 44, 54,000 (9). Ch. curvatus, Castr., occurred at fourteen stations and was distributed on both sides of the island: see Appendix I. Ch. dichaeta, Ehr., and its variety tenuicornis, Mangin, have occurred irregularly on each side of the island; their distribution is shown in Appendix I. 8-2
Size: 2437px × 2051px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
