Archive image from page 68 of Discovery reports (1935-1936) Discovery reports discoveryreports11inst Year: 1935-1936 DISTRIBUTION OF PHYTOPLANKTON S3 Rh. bidens, Karsten, was recorded at five stations: 137, 161, WS 112, WS 113 and WS 114. Rh. chunii, Karsten, was only taken at two stations: 133 and 161. Rh. curvo, Karsten, occurred at twelve stations being taken in the largest numbers in the sub-Antarctic Zone between South Georgia and the Falkland Islands, as shown in Fig. 22. At Sts. 10, 11 and 12 approaching South Georgia from Tristan da Cunha 60° 50° «?1. ! a> # FALKLAND Is. â¡ â¡
Archive image from page 68 of Discovery reports (1935-1936) Discovery reports discoveryreports11inst Year: 1935-1936 DISTRIBUTION OF PHYTOPLANKTON S3 Rh. bidens, Karsten, was recorded at five stations: 137, 161, WS 112, WS 113 and WS 114. Rh. chunii, Karsten, was only taken at two stations: 133 and 161. Rh. curvo, Karsten, occurred at twelve stations being taken in the largest numbers in the sub-Antarctic Zone between South Georgia and the Falkland Islands, as shown in Fig. 22. At Sts. 10, 11 and 12 approaching South Georgia from Tristan da Cunha 60° 50° «?1. ! a> # FALKLAND Is. â¡ â¡ ,# ;~*x â & 55 *rZSfac â¡ < D 10,000- I I uSTST* -:or° â¢c* °Rgia 53,000 60° 50° 35 Fig. 22. Distribution of Rhizosolenia curva 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. in February 1926, where the N 50 V net was not used, it was taken in small num- bers in the N70 V net: 50, 45 and ca. 500 respectively. Its distribution as shown by N 50 V nets is given in Appendix I. The occurrence of this typically sub-Antarctic species in small numbers round South Georgia is interesting. Rh. obtusa, Hensen, has occurred irre- gularly on each side of the island, being taken in largest numbers at St. 161. Its distribution is shown in Appendix I. Since, as in the case of Rh. alata, there has been confusion in the past over this species, we reproduce drawings in Fig. 23 made from specimens taken on the survey. Rh. polydactylo, Castr. This diatom was not taken in any of the net samples, but was recorded in patches on a record Fig- 23. Rhizosolenia obtusa, Hensen, drawn from specimens in the survey.
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