The team examined groundwater samples from nearly 100 wells at the U.S. Department of Energy’s Oak Ridge Field Research Facility, a former nuclear waste disposal site, and found that environmental conditions in the groundwater varied greatly, with some areas contaminated with high levels of uranium and nitrates. heavy and radioactive metals.
They found that as stress increased, many species were suppressed, while species with higher resistance thrived. In conditions of little or no stress, species grew faster, resulting in more births, deaths, and migration. The researchers also found that processes such as dispersal limitation and random birth and death of microbes are reduced under stress, while heterogeneous selection, meaning that different environmental conditions favor different microbes, increases under stress.
The findings have important implications for environmental remediation and bioremediation, as understanding how microbial communities respond to stress can help develop strategies to manipulate conditions that will support microbial growth and contaminant degradation.
Source: Ferra
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