A new study has revealed how certain types of soil bacteria can be "primed" to consume more methane, a potent greenhouse gas, when it is present in the soil.

Methane is one of the most important greenhouse gases, and its levels in the atmosphere have been increasing steadily since the pre-industrial era. Methane is produced by a variety of sources, including natural sources such as wetlands and rice paddies, as well as human activities such as livestock farming, landfills and fossil fuel extraction.

Bacteria that consume methane play a crucial role in regulating methane levels in the atmosphere by breaking it down into carbon dioxide and water. However, the activity of these bacteria can be affected by a variety of factors, including the availability of nutrients and the composition of the soil microbial community.

The new study, published in the journal Nature Communications, found that the presence of certain types of bacteria in the soil can "prime" other bacteria to consume methane more efficiently. Priming occurs when bacteria are exposed to a low concentration of a substance, which makes them more responsive to that substance when they encounter it again in the future.

In the study, researchers found that when soils were exposed to a low concentration of methane, the activity of methane-consuming bacteria increased significantly. This suggests that even a small amount of methane in the soil can prime the bacteria and make them more efficient at consuming methane when it is present in higher concentrations.

The findings of this study have important implications for understanding how soil bacteria can help to mitigate methane emissions. By understanding the mechanisms that prime soil bacteria to consume methane, it may be possible to develop strategies to enhance this process and reduce methane levels in the atmosphere.

The study was conducted by researchers from the University of California, Berkeley, the University of California, Davis, and the Lawrence Berkeley National Laboratory.