Environmental sustainability has increasingly become more important in the World, with all nations seeking to come together to find vigorous ways to alleviate the deterioration of the environment. Studies that seek to provide policies on promoting environmental sustainability are available, but a dearth remains on how low-carbon energies can be employed to lower damage to the environment, especially in the BRICS countries, yet...

Marine Group I (MGI) Thaumarchaeota were originally described as chemoautotrophic nitrifiers, but molecular and isotopic evidence suggests heterotrophic and/or mixotrophic capabilities. Here, we investigated the quantity and composition of organic matter assimilated by individual, uncultured MGI cells from the Pacific Ocean to constrain their potential for mixotrophy and heterotrophy. We observed that most MGI cells did not as...

Summary Concurrent osmotic and chaotropic stress make MgCl 2 ‐rich brines extremely inhospitable environments. Understanding the limits of life in these brines is essential to the search for extraterrestrial life on contemporary and relict ocean worlds, like Mars, which could host similar environments. We sequenced environmental 16S rRNA genes and quantified microbial activity across a broad range of salinity and chaotropicity...

Summary Nitrogen fixation, the biological conversion of N 2 to NH 3 , is critical to alleviating nitrogen limitation in many marine ecosystems. To date, few measurements exist of N 2 fixation in deep‐sea sediments. Here, we conducted > 400 bottle incubations with sediments from methane seeps, whale falls and background sites off the western coast of the United States from 600 to 2893 m water depth to investigate the potential...