Microbial dynamics in distinct phases and for representative features. a Proportion plots of differential feature abundances using balances in gneiss on genus level grouped into four distinct phases. The proportion plot shows taxa of the crew and the built environment, which could be responsible to explain the differences between the earlier and the later sampling event in each phase (green and orange bars). Differential numerator taxa are grouped to the top (background color in light blue) and differential denominator taxa are grouped to the bottom (background color in dark blue). b Volatility analysis based on linear regression models with time of Acinetobacter, Staphylococcus, and Methanobrevibacter sp.