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Biogeography of bacterial communities exposed to progressive long-term environmental change
Citation
Logares, R and Lindstrom, ES and Langenheder, S and Logue, JB and Paterson, H and Laybourn-Parry, J and Rengefors, K and Tranvik, L and Bertilsson, S, Biogeography of bacterial communities exposed to progressive long-term environmental change, The ISME Journal, 7 pp. 937-948. ISSN 1751-7362 (2013) [Refereed Article]
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Copyright Statement
Copyright 2013 International Society for Microbial Ecology Licensed under Creative Commons Attribution-NonCommercial- NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) http://creativecommons.org/licenses/by-nc-nd/3.0/
DOI: doi:10.1038/ismej.2012.168
Abstract
The response of microbial communities to long-term environmental change is poorly understood.
Here, we study bacterioplankton communities in a unique system of coastal Antarctic lakes that
were exposed to progressive long-term environmental change, using 454 pyrosequencing of the 16S
rDNA gene (V3–V4 regions). At the time of formation, most of the studied lakes harbored marinecoastal
microbial communities, as they were connected to the sea. During the past 20 000 years,
most lakes isolated from the sea, and subsequently they experienced a gradual, but strong, salinity
change that eventually developed into a gradient ranging from freshwater (salinity 0) to hypersaline
(salinity 100). Our results indicated that present bacterioplankton community composition was
strongly correlated with salinity and weakly correlated with geographical distance between lakes.
A few abundant taxa were shared between some lakes and coastal marine communities.
Nevertheless, lakes contained a large number of taxa that were not detected in the adjacent sea.
Abundant and rare taxa within saline communities presented similar biogeography, suggesting that
these groups have comparable environmental sensitivity. Habitat specialists and generalists were
detected among abundant and rare taxa, with specialists being relatively more abundant at the
extremes of the salinity gradient. Altogether, progressive long-term salinity change appears to have
promoted the diversification of bacterioplankton communities by modifying the composition of
ancestral communities and by allowing the establishment of new taxa.
Item Details
Item Type: | Refereed Article |
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Keywords: | Antarctica; Bacteria; environmental change; long-term; pyrosequencing; salinity |
Research Division: | Biological Sciences |
Research Group: | Microbiology |
Research Field: | Microbial ecology |
Objective Division: | Environmental Management |
Objective Group: | Management of Antarctic and Southern Ocean environments |
Objective Field: | Biodiversity in Antarctic and Southern Ocean environments |
UTAS Author: | Paterson, H (Dr Harriet Paterson) |
ID Code: | 89595 |
Year Published: | 2013 |
Web of Science® Times Cited: | 239 |
Deposited By: | IMAS Research and Education Centre |
Deposited On: | 2014-03-07 |
Last Modified: | 2014-06-17 |
Downloads: | 411 View Download Statistics |
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