%0 Journal Article %T Abundance and Diversity of the Phototrophic Microbial Mat Communities of Sulphur Mountain Banff Springs and Their Significance to the Endangered Snail, <i>Physella johnsoni</i> %A Michael Bilyj %A Dwayne Lepitzki %A Elizabeth Hughes %A Jolantha Swiderski %A Erko Stackebrandt %A Charlie Pacas %A Vladimir V. Yurkov %J Open Journal of Ecology %P 488-516 %@ 2162-1993 %D 2014 %I Scientific Research Publishing %R 10.4236/oje.2014.48041 %X

Seasonal population fluctuations and diversity of anoxygenic phototrophs and cyanobacteria at the Sulphur Mountain thermal springs, Banff, Canada were investigated and compared to drastic population changes of the endangered snail Physella johnsoni. The microbial community revealed new species of anoxygenic phototrophic bacteria with novel spectral and morphological characteristics. Major mat-forming organisms included densely growing Thiothrix-like species, oxygenic phototrophs of the genera Spirulina, Oscillatoria, and Phormidium and purple nonsulfur bacteria Rhodobacter, Rhodopseudomonas and Rhodomicrobium. Aerobic anoxygenic phototrophs comprised a significant portion, upwards of 9.6 กม 104 CFU/cm2 of mat or 18.9% of total aerobic heterotrophic isolates, while PNSB and purple sulfur bacteria were quantified at maximum abundance of 3.2 กม 105 and 2.0 กม 106 CFU/cm