Fig. 9From: Latitudinal patterns and interannual variations of spring phytoplankton in relation to hydrographic conditions of the southwestern Atlantic Ocean (34°–62°S)Grouping (UPGMA) of the stations of the three surveys based on diatom data (Jaccard’s index). Species used (117) are restricted to those present at levels above 1 % in at least one sample of each transect. Biogeographic assignments are those indicated in Olguín et al. (2006) and Figs. 1 and 2 Back to article page