Figure 7. Temporal changes in the abundance ratio of Synechococcus over Isochrysis in relation to salinity as indicated by: (a) sediment soluble salt content³⁶; (b) abundance of anhydrite⁵; (c) abundance of halite⁵; (d) iGDGT cluster group; (e) the abundance ratio of Synechococcus over Isochrysis as determined by qPCR of the 23S rDNA fragment.

The vertical dashed line refers to the time when the abundance ratio changed from mostly <1 to >1.