Relationship of geographic distance, depth, temperature, and viruses with prokaryotic communities in the eastern tropical Atlantic Ocean

• Christian Winter ^[1] ; Markus M. Moeseneder ^[2] ; Gerhard J. Herndl ; Markus G. Weinbauer ^[3]
  1. [1] University of British Columbia

     University of British Columbia

     Canadá

     
  2. [2] University of Vienna

     University of Vienna

     Innere Stadt, Austria

     
  3. [3] Pierre and Marie Curie University

     Pierre and Marie Curie University

     París, Francia

     

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• Localización: Microbial ecology, ISSN-e 1432-184X, ISSN 0095-3628, Vol. 56, Nº. 2, 2008, págs. 383-389
• Idioma: inglés
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• Resumen
  • English

    The richness and biogeographical distribution pattern of bacterial and archaeal communities was assessed by terminal restriction fragment length polymorphism analysis of polymerase chain reaction-amplified fragments of the 16S rRNA gene at the surface (15–25 m depth), in the deep chlorophyll maximum layer (DCM; 50 m depth), and deep waters (75–1000 m depth) of the eastern tropical Atlantic Ocean. Additionally, prokaryotic and viral abundance and the frequency of infected prokaryotic cells (FIC) were determined along with physico-chemical parameters to identify factors influencing prokaryotic richness and biogeography. Viral abundance was highest in the DCM layer averaging 45.5 × 106 ml−1, whereas in the mixed surface layer and in the waters below the DCM, average viral abundance was 11.3 × 106 and 4.3 × 106 ml−1, respectively. The average estimate of FIC was 8.3% in the mixed surface layer and the DCM and 2.4% in deeper waters. FIC was positively related to prokaryotic and viral abundance and negatively to archaeal richness. There was no detectable effect of geographic distance (maximum distance between stations ∼4600 km) or differences between water masses on bacterial and archaeal community composition. Bacterial communities showed a clear depth zonation, whereas changes in archaeal community composition were related to temperature and FIC. The results indicate that planktonic archaeal virus host systems are a dynamic component of marine ecosystems under natural conditions.

  • English

    https://link.springer.com/article/10.1007/s00248-007-9343-x