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Ancient Photosynthetic Eukaryote Biofilms in an Atacama Desert Coastal Cave

An Erratum to this article was published on 07 May 2009

Abstract

Caves offer a stable and protected environment from harsh and changing outside prevailing conditions. Hence, they represent an interesting habitat for studying life in extreme environments. Here, we report the presence of a member of the ancient eukaryote red algae Cyanidium group in a coastal cave of the hyperarid Atacama Desert. This microorganism was found to form a seemingly monospecific biofilm growing under extremely low photon flux levels. Our work suggests that this species, Cyanidium sp. Atacama, is a new member of a recently proposed novel monophyletic lineage of mesophilic “cave” Cyanidium sp., distinct from the remaining three other lineages which are all thermo-acidophilic. The cave described in this work may represent an evolutionary island for life in the midst of the Atacama Desert.

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Acknowledgments

This work was supported by the Millennium Institute of Fundamental and Applied Biology (Chile). We also thank the members of Rafael Vicuña’s Laboratory for critical comments and insights which helped to improve this manuscript.

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No competing financial interests exist in connection with the submitted manuscript. This applies to all authors of this paper.

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Correspondence to A. Azúa-Bustos.

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An erratum to this article can be found at http://dx.doi.org/10.1007/s00248-009-9521-0

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Azúa-Bustos, A., González-Silva, C., Mancilla, R.A. et al. Ancient Photosynthetic Eukaryote Biofilms in an Atacama Desert Coastal Cave. Microb Ecol 58, 485–496 (2009). https://doi.org/10.1007/s00248-009-9500-5

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Keywords

  • rbcL
  • Photosynthetic Photon Flux Density
  • rbcL Gene
  • psbA Gene
  • Western Wall