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Factors influencing bacterial dynamics along a transect from supraglacial runoff to proglacial lakes of high Arctic glaciers

Citation

Mindl, B and Anesio, AM and Meirer, K and Hodson, AJ and Laybourn-Parry, J and Sommaruga, R and Sattler, B, Factors influencing bacterial dynamics along a transect from supraglacial runoff to proglacial lakes of high Arctic glaciers, FEMS Microbial Ecology, 59, (2) pp. 762-772. ISSN 0095-3628 (2007) [Refereed Article]


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The definitive published version is available online at: http://interscience.wiley.com

Official URL: http://interscience.wiley.com

DOI: doi:10.1111/j.1574-6941.2006.00262.x

Abstract

Bacterial production in glacial runoff and aquatic habitats along a c. 500m transect from the ablation area of a Svalbard glacier (Midre Lov´enbreen, 791N, 121E) down to a series of proglacial lakes in its forefield were assessed. In addition, a series of in situ experiments were conducted to test how different nutrient sources (glacial flour and dissolved organic matter derived from goose faeces) and temperature affect bacterial abundance and production in these ecosystems. Bacterial abundance and production increased significantly along this transect and reached a maximum in the proglacial lakes. Bacterial diversity profiles as assessed by denaturing gradient gel electrophoresis indicated that communities in glacial runoff were different from those in proglacial lakes. Heterotrophic bacterial production was mainly controlled by temperature and phosphorus limitation. Addition of both glacial flour and dissolved organic matter derived from goose faeces stimulated bacterial production in those lakes. The results suggest that glacial runoff sustains an active bacterial community which is further stimulated in proglacial lakes by higher temperatures and nutrient inputs from bird faeces. Thus, as in maritime temperate and Antarctic settings, bacterial communities developing in the recently deglaciated terrain of Svalbard receive important inputs of nutrients via faunal transfers from adjacent ecosystems.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Microbiology
Research Field:Microbial Ecology
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Antarctic and Sub-Antarctic Flora, Fauna and Biodiversity
Author:Laybourn-Parry, J (Professor Johanna Laybourn-Parry)
ID Code:49031
Year Published:2007
Web of Science® Times Cited:62
Deposited By:Research Division
Deposited On:2007-11-12
Last Modified:2009-06-09
Downloads:6 View Download Statistics

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