Figure 2

Comparisons of brGDGT distribution between soil samples and bog samples collected by this study and analyzed with the new method and the old method. (A) Subtropical soil samples analyzed with the new method. (B) Subtropical soil samples analyzed with the old method. (C) Subtropical bog samples analyzed with the new method. (D) Subtropical bog samples analyzed with the old method. (A,C) show the abundance of 15 brGDGT fractions. (B,D) reveal the abundance of 9 brGDGT fractions. Fractional abundance is expressed as percentage of the total brGDGTs.