. Fig. 48. Chart showing the provisional boundaries of areas in which distinctive plankton communities have been found. limits of this area are ill-defined near the South Orkneys, and uncertain on the west side of Drake Passage. (3) The transition belt. Derived from Fig. 21, p. 105. This is the belt in which the normal southern limits of the warmest water species and the northern limits of the coldest water species are found. One would expect to find the cold-water species prominent here in the early summer and the warm-water species later. This zone largely encloses the line separating the wa
. Fig. 48. Chart showing the provisional boundaries of areas in which distinctive plankton communities have been found. limits of this area are ill-defined near the South Orkneys, and uncertain on the west side of Drake Passage. (3) The transition belt. Derived from Fig. 21, p. 105. This is the belt in which the normal southern limits of the warmest water species and the northern limits of the coldest water species are found. One would expect to find the cold-water species prominent here in the early summer and the warm-water species later. This zone largely encloses the line separating the waters derived from the Bellingshausen and Weddell Seas, and may be taken to include South Georgia and the adjacent whaling grounds. Strictly
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