Mapping the Fundamental Niches of Two Freshwater Microalgae, Chlorella vulgaris (Trebouxiophyceae) and Peridinium cinctum (Dinophyceae), in 5-Dimensional Ion Space
Figure 1
A 3-dimensional (3-D) visualization of the 5-dimensional experimental design used in this study. The concentrations of the individual ions and total ion concentration for each medium were compared via a Euclidean distance-based similiarity index and plotted via multidimensional scaling (MDS; Primer V6.0). The three views, A, B, and C are 90° rotations in the direction indicated by the arrows. The 30 mM vertices for each of the five ions are labeled with , , K+, Na+, or Cl−. The vertices for these ions at each of the other total ion concentrations can be found in the same orientation. While it is impossible to accurately portray a higher-dimensional figure in lower dimensions, that is, some distortions are inevitable, these projections give an indication of the structure and symmetry of the 5-dimensional experimental design. The “clustering” of points with similar total ion concentrations are indicated by the colored arrows.
