Diel-scale temporal dynamics recorded for bacterial groups in Namib Desert soil

A groundbreaking study of the Namib Sand Sea reveals that bacterial communities in hot desert soils exhibit complex, diel-dependent inter-community associations. Contrary to expectations, environmental factors like temperature and humidity only account for 10.5% of the variation observed in active bacterial groups over a 24-hour period. The research used T-RFLP fingerprinting and 454 pyrosequencing to track shifts in potentially active bacteria, finding significant changes in Actinobacteria and Proteobacterial groups between morning and night. Notably, cyanobacterial groups acted as inter-module 'hubs,' possibly orchestrating interactions among functional consortia. These findings challenge previous assumptions about microbial dynamics in extreme environments.

Gunnigle, E., Frossard, A., Ramond, J.-B., Guerrero, L., Seely, M., & Cowan, D. A. (2017). Diel-scale temporal dynamics recorded for bacterial groups in Namib Desert soil. Scientific Reports, 7(1). https://doi.org/10.1038/srep40189