Imperial College London
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DrThomasScheuerl

Faculty of Natural Sciences, Department of Life Sciences (Silwood Park)

Visiting Researcher
 
 
 
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t.scheuerl CV

 
 
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Centre for Population BiologySilwood Park

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Summary

 

Publications

Citation

BibTex format

@article{Hahn:2012:10.1371/journal.pone.0032772,
author = {Hahn, MW and Scheuerl, T and Jezberová, J and Koll, U and Jezbera, J and imek, K and Vannini, C and Petroni, G and Wu, QL},
doi = {10.1371/journal.pone.0032772},
journal = {PLOS One},
title = {The passive yet successful way of planktonic life: genomic and experimental analysis of the ecology of a free-living polynucleobacter population},
url = {http://dx.doi.org/10.1371/journal.pone.0032772},
volume = {7},
year = {2012}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - BACKGROUND: The bacterial taxon Polynucleobacter necessarius subspecies asymbioticus represents a group of planktonic freshwater bacteria with cosmopolitan and ubiquitous distribution in standing freshwater habitats. These bacteria comprise <1% to 70% (on average about 20%) of total bacterioplankton cells in various freshwater habitats. The ubiquity of this taxon was recently explained by intra-taxon ecological diversification, i.e. specialization of lineages to specific environmental conditions; however, details on specific adaptations are not known. Here we investigated by means of genomic and experimental analyses the ecological adaptation of a persistent population dwelling in a small acidic pond. FINDINGS: The investigated population (F10 lineage) contributed on average 11% to total bacterioplankton in the pond during the vegetation periods (ice-free period, usually May to November). Only a low degree of genetic diversification of the population could be revealed. These bacteria are characterized by a small genome size (2.1 Mb), a relatively small number of genes involved in transduction of environmental signals, and the lack of motility and quorum sensing. Experiments indicated that these bacteria live as chemoorganotrophs by mainly utilizing low-molecular-weight substrates derived from photooxidation of humic substances. CONCLUSIONS: Evolutionary genome streamlining resulted in a highly passive lifestyle so far only known among free-living bacteria from pelagic marine taxa dwelling in environmentally stable nutrient-poor off-shore systems. Surprisingly, such a lifestyle is also successful in a highly dynamic and nutrient-richer environment such as the water column of the investigated pond, which was undergoing complete mixis and pronounced stratification in diurnal cycles. Obviously, metabolic and ecological versatility is not a prerequisite for long-lasting establishment of abundant bacterial populations under highly dynamic environmental conditions. Caut
AU  - Hahn,MW
AU  - Scheuerl,T
AU  - Jezberová,J
AU  - Koll,U
AU  - Jezbera,J
AU  - imek,K
AU  - Vannini,C
AU  - Petroni,G
AU  - Wu,QL
DO  - 10.1371/journal.pone.0032772
PY  - 2012///
SN  - 1932-6203
TI  - The passive yet successful way of planktonic life: genomic and experimental analysis of the ecology of a free-living polynucleobacter population
T2  - PLOS One
UR  - http://dx.doi.org/10.1371/journal.pone.0032772
UR  - http://hdl.handle.net/10044/1/31239
VL  - 7
ER  -
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