Bacterial dominance of phototrophic communities in a High Arctic lake and its implications for paleoclimate analysis. Polar Sci
Abstract The phototrophic communities in meromictic, perennially ice-covered Lake A, on Ellesmere Island in the Canadian High Arctic, were characterized by pigment analysis using high performance liquid chromatography. Samples were taken to determine the vertical changes down the water column as wel...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1040.6266 2023-05-15T14:56:20+02:00 Bacterial dominance of phototrophic communities in a High Arctic lake and its implications for paleoclimate analysis. Polar Sci Dermot Antoniades Julie Veillette Marie-Josée Martineau Claude Belzile Jessica Tomkins Reinhard Pienitz Scott Lamoureux Warwick F Vincent The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1040.6266 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/248.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1040.6266 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/248.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cen.ulaval.ca/warwickvincent/PDFfiles/248.pdf text 2009 ftciteseerx 2020-03-08T01:23:58Z Abstract The phototrophic communities in meromictic, perennially ice-covered Lake A, on Ellesmere Island in the Canadian High Arctic, were characterized by pigment analysis using high performance liquid chromatography. Samples were taken to determine the vertical changes down the water column as well as a variation between years. These analyses showed that Lake A had distinct phototrophic communities in its oxic and anoxic layers. The pigment analyses indicated that phototrophic biomass in the upper, oxic waters was dominated by picocyanobacteria, while in the lower, anoxic layer photosynthetic green sulphur bacteria were dominant. Interannual variation in pigment concentrations was related to the penetration of photosynthetically active radiation in the water column, suggesting that light availability may be limiting the net accumulation of photosynthetic bacterial biomass in Lake A. Pigment analysis of the surface sediments indicated that deposition was dominated by the photosynthetic sulphur bacterial contribution. The sedimentary record of bacterial pigments in polar meromictic lakes offers a promising tool for the reconstruction of past changes in ice cover and therefore in climate. Text Arctic Ellesmere Island Unknown Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Ellesmere Island |
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Open Polar |
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ftciteseerx |
language |
English |
description |
Abstract The phototrophic communities in meromictic, perennially ice-covered Lake A, on Ellesmere Island in the Canadian High Arctic, were characterized by pigment analysis using high performance liquid chromatography. Samples were taken to determine the vertical changes down the water column as well as a variation between years. These analyses showed that Lake A had distinct phototrophic communities in its oxic and anoxic layers. The pigment analyses indicated that phototrophic biomass in the upper, oxic waters was dominated by picocyanobacteria, while in the lower, anoxic layer photosynthetic green sulphur bacteria were dominant. Interannual variation in pigment concentrations was related to the penetration of photosynthetically active radiation in the water column, suggesting that light availability may be limiting the net accumulation of photosynthetic bacterial biomass in Lake A. Pigment analysis of the surface sediments indicated that deposition was dominated by the photosynthetic sulphur bacterial contribution. The sedimentary record of bacterial pigments in polar meromictic lakes offers a promising tool for the reconstruction of past changes in ice cover and therefore in climate. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Dermot Antoniades Julie Veillette Marie-Josée Martineau Claude Belzile Jessica Tomkins Reinhard Pienitz Scott Lamoureux Warwick F Vincent |
spellingShingle |
Dermot Antoniades Julie Veillette Marie-Josée Martineau Claude Belzile Jessica Tomkins Reinhard Pienitz Scott Lamoureux Warwick F Vincent Bacterial dominance of phototrophic communities in a High Arctic lake and its implications for paleoclimate analysis. Polar Sci |
author_facet |
Dermot Antoniades Julie Veillette Marie-Josée Martineau Claude Belzile Jessica Tomkins Reinhard Pienitz Scott Lamoureux Warwick F Vincent |
author_sort |
Dermot Antoniades |
title |
Bacterial dominance of phototrophic communities in a High Arctic lake and its implications for paleoclimate analysis. Polar Sci |
title_short |
Bacterial dominance of phototrophic communities in a High Arctic lake and its implications for paleoclimate analysis. Polar Sci |
title_full |
Bacterial dominance of phototrophic communities in a High Arctic lake and its implications for paleoclimate analysis. Polar Sci |
title_fullStr |
Bacterial dominance of phototrophic communities in a High Arctic lake and its implications for paleoclimate analysis. Polar Sci |
title_full_unstemmed |
Bacterial dominance of phototrophic communities in a High Arctic lake and its implications for paleoclimate analysis. Polar Sci |
title_sort |
bacterial dominance of phototrophic communities in a high arctic lake and its implications for paleoclimate analysis. polar sci |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1040.6266 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/248.pdf |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) |
geographic |
Arctic Arctic Lake Ellesmere Island |
geographic_facet |
Arctic Arctic Lake Ellesmere Island |
genre |
Arctic Ellesmere Island |
genre_facet |
Arctic Ellesmere Island |
op_source |
http://www.cen.ulaval.ca/warwickvincent/PDFfiles/248.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1040.6266 http://www.cen.ulaval.ca/warwickvincent/PDFfiles/248.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766328364269830144 |