Fig. 4: Cell abundances in groundwaters.
From: Hydrogen and dark oxygen drive microbial productivity in diverse groundwater ecosystems
Cell abundance was determined using fluorescence microscopy and is given on a logarithmic scale. Boxplots show 1st and 3rd quartile, maximum and minimum values (whiskers), median (line), mean (triangle), and outlier (dots). a Boxplots represent groundwater samples from individual wells and summarize cell counts from n independent fields of view. n = 40: Samples 3–10, 12, 15–22, 24–29, 34–47, 49–51, 54, 56, 63, 67–68, 70–71. n = 39: Samples 1, 14, 33. n = 38: Sample 2. n = 20: Samples 13, 31–32, 55, 57, 61, 72. n = 12: Sample 73. For more details on individual cell counts see Supplementary Data 2. X axis: Numbers correspond to well IDs (due to space constraints well IDs are given in Supplementary Data 1). Wells which were sampled at two different time points are marked with a star (*), technical replicates are marked with a plus (+). b Boxplots represent cell numbers averaged across groundwater age summarizing the average cell numbers in a (excluding technical replicates). n number of samples. Significance was tested using a Wilcoxon rank sum test. Significance levels are: *p < 0.05; **p < 0.01; ***p < 0.001; (uncorrected).
