Abstract
Airborne microbial diversity is much greater than expected, albeit spare compared to that in the ocean and in the soil, according graduate student Robert M. Bowers, his advisor Noah Fierer, and their collaborators at the University of Colorado, Boulder, and elsewhere, who collected their data at Storm Peak lab in northwestern Colorado at an elevation of 3,200 meters. Moreover, the species of bacteria that they observe in the troposphere remain relatively stable over time, despite changing conditions. Further, ice nucleation—a precursor to precipitation—does not correlate with the local abundance of known ice-nucleating microbes. Details appear in the August Applied and Environmental Microbiology (75:5121– 5130).
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