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| Titel |
Differences in community composition of bacteria in four glaciers in western China |
| VerfasserIn |
L. Z. An, Y. Chen, S.-R. Xiang, T.-C. Shang, L.-D. Tian |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 7, no. 6 ; Nr. 7, no. 6 (2010-06-20), S.1937-1952 |
| Datensatznummer |
250004847
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| Publikation (Nr.) |
 copernicus.org/bg-7-1937-2010.pdf |
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| Zusammenfassung |
| Microbial community patterns vary in glaciers worldwide, presenting unique
responses to global climatic and environmental changes. Four bacterial clone
libraries were established by 16S rRNA gene amplification from four ice
layers along the 42-m-long ice core MuztB drilled from the Muztag Ata
Glacier. A total of 151 bacterial sequences obtained from the ice core MuztB
were phylogenetically compared with the 71 previously reported sequences
from three ice cores extracted from ice caps Malan, Dunde, and Puruogangri.
Six phylogenetic clusters Flavisolibacter, Flexibacter
(Bacteroidetes), Acinetobacter, Enterobacter
(Gammaproteobacteria), Planococcus/Anoxybacillus (Firmicutes), and
Propionibacter/Luteococcus (Actinobacteria) frequently occurred along the Muztag Ata Glacier profile, and their
proportion varied by seasons. Sequence analysis showed that most of the
sequences from the ice core clustered with those from cold environments, and
the sequence clusters from the same glacier more closely grouped together
than those from the geographically isolated glaciers. Moreover, bacterial
communities from the same location or similarly aged ice formed a cluster,
and were clearly separate from those from other geographically isolated
glaciers. In summary, the findings provide preliminary evidence of zonal
distribution of microbial community, and suggest biogeography of
microorganisms in glacier ice. |
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