Aquifers have been considered very stable habitats, characterized by low responsiveness and dynamics even after anthropogenic pollution. This dissertation changes this view with new insights into the ecology of anaerobic toluene degraders in contaminated aquifers. These were identified as Desulfobulbaceae via 13C-labeling of DNA from the lower sulfidogenic fringe community of a contaminated aquifer plume. Furthermore, time-resolved sampling at the site has shown, for the first time, these populations to be affected by fluctuations of the water table (hydraulic dynamics) in their abundance and activity. These dynamics can be interpreted as a previously unrecognized environmental limitation for microbial degradation of pollutants in groundwater.
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Aquifers have been considered very stable habitats, characterized by low responsiveness and dynamics even after anthropogenic pollution. This dissertation changes this view with new insights into the ecology of anaerobic toluene degraders in contaminated aquifers. These were identified as Desulfobulbaceae via 13C-labeling of DNA from the lower sulfidogenic fringe community of a contaminated aquifer plume. Furthermore, time-resolved sampling at the site has shown, for the first time, these popula...
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