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Bacterial recovery from ancient glacial ice
Author(s) -
Christner Brent C.,
MosleyThompson Ellen,
Thompson Lonnie G.,
Reeve John N.
Publication year - 2003
Publication title -
environmental microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.954
H-Index - 188
eISSN - 1462-2920
pISSN - 1462-2912
DOI - 10.1046/j.1462-2920.2003.00422.x
Subject(s) - ice core , biology , glacial period , 16s ribosomal rna , plateau (mathematics) , bacteria , ecology , paleontology , geology , oceanography , mathematical analysis , mathematics
Summary Ice that forms the bottom 18 m of a 308 m ice core drilled from the Guliya ice cap on the Qinghan‐Tibetan plateau in Western China is over 750 000 years old and is the oldest glacial ice known to date. Fourteen bacterial isolates have been recovered from samples of this ice from ∼296 m below the surface (mbs). Based on 16S rDNA sequences, these are members of the α‐ and β‐proteobacterial, actinobacterial and low‐G + C Gram‐positive bacterial lineages. 16S rDNA molecules have also been amplified directly, cloned and sequenced from the ice‐core melt water. These originated from Pseudomonas and Acinetobacter γ‐proteobacterial species. These results demonstrate that bacteria can be recovered from water ice that has frozen for time periods relevant to biological survival through terrestrial ice ages or during interplanetary transport.