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Bahl J, Lau MC, Smith GJ, et al. Ancient origins determine global biogeography of hot and cold desert cyanobacteria. Nat Commun. 2011;2:163doi: 10.1038/ncomms1167.
Bahl, J., Lau, M. C., Smith, G. J., Vijaykrishna, D., Cary, S. C., Lacap, D. C., Lee, C. K., Papke, R. T., Warren-Rhodes, K. A., Wong, F. K., McKay, C. P., & Pointing, S. B. (2011). Ancient origins determine global biogeography of hot and cold desert cyanobacteria. Nature communications, 2163. https://doi.org/10.1038/ncomms1167
Bahl, Justin, et al. "Ancient origins determine global biogeography of hot and cold desert cyanobacteria." Nature communications vol. 2 (2011): 163. doi: https://doi.org/10.1038/ncomms1167
Bahl J, Lau MC, Smith GJ, Vijaykrishna D, Cary SC, Lacap DC, Lee CK, Papke RT, Warren-Rhodes KA, Wong FK, McKay CP, Pointing SB. Ancient origins determine global biogeography of hot and cold desert cyanobacteria. Nat Commun. 2011 Jan 25;2:163. doi: 10.1038/ncomms1167. PMID: 21266963; PMCID: PMC3105302.
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Nat Commun. 2011 Jan 25;2:163. doi: 10.1038/ncomms1167.

Ancient origins determine global biogeography of hot and cold desert cyanobacteria.

Nature communications

Justin Bahl, Maggie C Y Lau, Gavin J D Smith, Dhanasekaran Vijaykrishna, S Craig Cary, Donnabella C Lacap, Charles K Lee, R Thane Papke, Kimberley A Warren-Rhodes, Fiona K Y Wong, Christopher P McKay, Stephen B Pointing

Affiliations

  1. Duke-NUS Graduate Medical School, Singapore 169857.

PMID: 21266963 PMCID: PMC3105302 DOI: 10.1038/ncomms1167

Abstract

Factors governing large-scale spatio-temporal distribution of microorganisms remain unresolved, yet are pivotal to understanding ecosystem value and function. Molecular genetic analyses have focused on the influence of niche and neutral processes in determining spatial patterns without considering the temporal scale. Here, we use temporal phylogenetic analysis calibrated using microfossil data for a globally sampled desert cyanobacterium, Chroococcidiopsis, to investigate spatio-temporal patterns in microbial biogeography and evolution. Multilocus phylogenetic associations were dependent on contemporary climate with no evidence for distance-related patterns. Massively parallel pyrosequencing of environmental samples confirmed that Chroococcidiopsis variants were specific to either hot or cold deserts. Temporally scaled phylogenetic analyses showed no evidence of recent inter-regional gene flow, indicating populations have not shared common ancestry since before the formation of modern continents. These results indicate that global distribution of desert cyanobacteria has not resulted from widespread contemporary dispersal but is an ancient evolutionary legacy. This highlights the importance of considering temporal scales in microbial biogeography.

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