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Temporal and Spatial Coexistence of Archaeal and BacterialamoAGenes and Gene Transcripts in Lake Lucerne

  • Vissers, Elisabeth W. Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB Wageningen, The Netherlands
  • Anselmetti, Flavio S. Institute of Geological Sciences and Oeschger Centre for Climate Change Research, University of Bern, Zähringerstrasse 25, 3012 Bern, Switzerland
  • Bodelier, Paul L. E. Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB Wageningen, The Netherlands
  • Muyzer, Gerard Department of Aquatic Microbiology, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
  • Schleper, Christa Department of Genetics in Ecology, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
  • Tourna, Maria AgResearch Ltd., Ruakura Centre, East Street Private Bag 3115, Hamilton 3240, New Zealand
  • Laanbroek, Hendrikus J. Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
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Published in:
  • Archaea. - Hindawi Limited. - 2013, vol. 2013, p. 1-11
Physiology
Ecology, Evolution, Behavior and Systematics
Microbiology
English Despite their crucial role in the nitrogen cycle, freshwater ecosystems are relatively rarely studied for active ammonia oxidizers (AO). This study of Lake Lucerne determined the abundance of bothamoAgenes and gene transcripts of ammonia-oxidizing archaea (AOA) and bacteria (AOB) over a period of 16 months, shedding more light on the role of both AO in a deep, alpine lake environment. At the surface, at 42 m water depth, and in the water layer immediately above the sediment, AOA generally outnumbered AOB. However, in the surface water during summer stratification, when both AO were low in abundance, AOB were more numerous than AOA. Temporal distribution patterns of AOA and AOB were comparable. Higher abundances ofamoAgene transcripts were observed at the onset and end of summer stratification. In summer, archaealamoAgenes and transcripts correlated negatively with temperature and conductivity. Concentrations of ammonium and oxygen did not vary enough to explain theamoAgene and transcript dynamics. The observed herbivorous zooplankton may have caused a hidden flux of mineralized ammonium and a change in abundance of genes and transcripts. At the surface, AO might have been repressed during summer stratification due to nutrient limitation caused by active phytoplankton.
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  • English
Open access status
gold
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https://sonar.ch/global/documents/132189
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