Title Differences in community composition of bacteria in four glaciers in western China
Author An, L.Z.; Chen, Y.; Xiang, S.R.; Shang, T.C.; Tian, L.D.
Author Affil An, L.Z., Lanzhou University, School of Life Sciences, Key Laboratory of Arid and Grassland Agroecology, Lanzhou, China. Other: Chinese Academy of Science, Institute of Tibetan Plateau Research, China; Chinese Academy of Science, Cold and Arid Regions Environmental Engineering Research Institute, China; Gansu Agricultural University, China
Source Biogeosciences, 7(6), p.1937-1952, . Publisher: Copernicus GmbH on behalf of the European Union, Katlenburg-Lindau, International. ISSN: 1726- 4170
Publication Date 2010
Notes In English. Published in Biogeosciences Discussions: 17 February 2010, http://www.biogeosciences- discuss.net/7/1167/2010/bgd-7-1167-2010.html; accessed in Apr., 2011; abstract: doi:10.5194/bg-7-1937-2010. 71 refs. GeoRef Acc. No: 310434
Index Terms bacteria; biogeography; biomass; climatic change; glaciers; meltwater; statistical analysis; China--Xinjiang; Asia; biodiversity; China; climate change; DNA; Dunde Ice Cap; Far East; genes; ice cores; Malan Ice Cap; Muztag Ata Glacier; phylogeny; Puruogangri Ice Cap; Xinjiang China
Abstract 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.
URL http://www.biogeosciences.net/7/1937/2010/bg-7-1937-2010.pdf
Publication Type journal article
Record ID 65007163