Bacteria in Himalayan glacial ice and its relationship to dust
Concentrations and community diversity of bacteria from 50 segments of a 108.83 m ice core drilled from the East Rongbuk (ER) Glacier (28.03° N, 86.96° E, 6518 m above sea level) on the northeast slope of Mt. Qomolangma (Everest), covering the period 950–1963 AD, were investigated by epifluorescence...
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ftdoajarticles:oai:doaj.org/article:5ca3d2b2638544538a25a675e666c394 2023-05-15T16:39:08+02:00 Bacteria in Himalayan glacial ice and its relationship to dust S. Zhang S. Hou Y. Wu D. Qin 2008-12-01T00:00:00Z https://doaj.org/article/5ca3d2b2638544538a25a675e666c394 EN eng Copernicus Publications http://www.biogeosciences.net/5/1741/2008/bg-5-1741-2008.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/5ca3d2b2638544538a25a675e666c394 Biogeosciences, Vol 5, Iss 6, Pp 1741-1750 (2008) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2008 ftdoajarticles 2022-12-30T21:39:49Z Concentrations and community diversity of bacteria from 50 segments of a 108.83 m ice core drilled from the East Rongbuk (ER) Glacier (28.03° N, 86.96° E, 6518 m above sea level) on the northeast slope of Mt. Qomolangma (Everest), covering the period 950–1963 AD, were investigated by epifluorescence microscope, DGGE and Shannon-Weaver index analysis. Bacteria in the ER core were identified as β, γ- proteobacteria and Firmicutes group, with γ- proteobacteria being the dominance. Different bacterial population was identified along the core, reflecting the effects of climatic and environmental changes on the bacterial distribution in the glacial ice. There are four general periods of bacterial diversity, corresponding to four phases of dust abundance revealed by Ca 2+ concentrations. However, a previously suggested positive correlation between bacterial and Ca 2+ concentrations was not indicated by our observations. Instead, a weak negative correlation was found between these two parameters. Our results suggest that bacterial community diversity, rather than concentrations, might be a suitable biological proxy for the reconstruction of past climatic and environmental changes preserved in glacial ice. Article in Journal/Newspaper ice core Directory of Open Access Journals: DOAJ Articles Weaver ENVELOPE(-153.833,-153.833,-86.967,-86.967) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 S. Zhang S. Hou Y. Wu D. Qin Bacteria in Himalayan glacial ice and its relationship to dust |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Concentrations and community diversity of bacteria from 50 segments of a 108.83 m ice core drilled from the East Rongbuk (ER) Glacier (28.03° N, 86.96° E, 6518 m above sea level) on the northeast slope of Mt. Qomolangma (Everest), covering the period 950–1963 AD, were investigated by epifluorescence microscope, DGGE and Shannon-Weaver index analysis. Bacteria in the ER core were identified as β, γ- proteobacteria and Firmicutes group, with γ- proteobacteria being the dominance. Different bacterial population was identified along the core, reflecting the effects of climatic and environmental changes on the bacterial distribution in the glacial ice. There are four general periods of bacterial diversity, corresponding to four phases of dust abundance revealed by Ca 2+ concentrations. However, a previously suggested positive correlation between bacterial and Ca 2+ concentrations was not indicated by our observations. Instead, a weak negative correlation was found between these two parameters. Our results suggest that bacterial community diversity, rather than concentrations, might be a suitable biological proxy for the reconstruction of past climatic and environmental changes preserved in glacial ice. |
format |
Article in Journal/Newspaper |
author |
S. Zhang S. Hou Y. Wu D. Qin |
author_facet |
S. Zhang S. Hou Y. Wu D. Qin |
author_sort |
S. Zhang |
title |
Bacteria in Himalayan glacial ice and its relationship to dust |
title_short |
Bacteria in Himalayan glacial ice and its relationship to dust |
title_full |
Bacteria in Himalayan glacial ice and its relationship to dust |
title_fullStr |
Bacteria in Himalayan glacial ice and its relationship to dust |
title_full_unstemmed |
Bacteria in Himalayan glacial ice and its relationship to dust |
title_sort |
bacteria in himalayan glacial ice and its relationship to dust |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doaj.org/article/5ca3d2b2638544538a25a675e666c394 |
long_lat |
ENVELOPE(-153.833,-153.833,-86.967,-86.967) |
geographic |
Weaver |
geographic_facet |
Weaver |
genre |
ice core |
genre_facet |
ice core |
op_source |
Biogeosciences, Vol 5, Iss 6, Pp 1741-1750 (2008) |
op_relation |
http://www.biogeosciences.net/5/1741/2008/bg-5-1741-2008.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/5ca3d2b2638544538a25a675e666c394 |
_version_ |
1766029468370993152 |