The streams of the McMurdo Dry Valleys have long been used as model ecosystems for studying relationships between physical processes and lotic microbial communities. Within these habitats, several community types have historically been recognized, including black Nostoc mats, orange Oscillatorian mats, green Chlorophyte mats, and stream sediments. Despite this tradition of study, a comparison of the diversity between these groups using molecular methods has been conspicuously lacking.
In a new study published in FEMS Microbiology Ecology, with Tyler as a coauthor, the researchers compared the prokaryotic diversity of these groups across the McMurdo Dry Valleys by sequencing the 16S rRNA gene. The authors found that stream communities are diversity hotspots within the Dry Valleys, and community types were significantly distinct from one another across sites as well as within streams, indicating that local conditions may dictate patterns of diversity in this region.
Van Horn DJ, Wolf CR, Colman DR, Jiang X, Kohler TJ, McKnight DM, Stanish viagra feminin avis lovegra LF, Yazzie T, Takacs-Vesbach CD (2016) Patterns of bacterial biodiversity in the glacial meltwater streams of the McMurdo Dry Valleys, Antarctica. FEMS Microbiology Ecology 92:fiw148 doi: 10.1093/femsec/fiw148