Figure 2
From: Microbial megacities fueled by methane oxidation in a mineral spring cave
Carbon and nitrogen stable isotope ratios measured for distinct biofilm compartments. Stable isotope signatures of methane and carbon dioxide either in gas bubbles seeping from the spring pool or in the cave atmosphere are indicated in gray shading. The length of the boxplots depicts the quartiles and the crosshair the range (min., max.) of isotope measurements for snottites.
