Phylogenetic diversity of sediment bacteria from the deep Northeastern Pacific Ocean: a comparison with the deep Eastern Mediterranean Sea

Autors/ores

  • Ioanna Kouridaki Department of Chemistry, University of Crete, Heraklion, Crete, Greece. Institute of Marine Biology and Genetics, Hellenic Centre for Marine Research, Heraklion, Crete, Greece.
  • Paraskevi N. Polymenakou Institute of Marine Biology and Genetics, Hellenic Centre for Marine Research, Heraklion, Crete, Greece
  • Anastasios Tselepides Institute of Marine Biology and Genetics, Hellenic Centre for Marine Research, Heraklion, Crete, Greece. Department of Maritime Studies, University of Piraeus, Piraeus, Greece
  • Manolis Mandalakis Institute of Marine Biology and Genetics, Hellenic Centre for Marine Research, Heraklion, Crete, Greece
  • Kenneth L. Smith, Jr Monterey Bay Aquarium Research Institute, Moss Landing, California, USA

Resum

The variability of bacterial community composition and diversity was studied by comparative analysis of five 16S rRNA gene clone libraries from deep-sea sediments (water column depth: 4000 m) of the Northeastern Pacific Ocean and Eastern Mediterranean Sea. This is the first comparison of the bacterial communities living in these deep-sea ecosystems. The estimated chlorophyll a, organic carbon, and C/N ratio provided evidence of significant differences in the trophic state of the sediments between the Northeastern Pacific Ocean and the much warmer Eastern Mediterranean Sea. A diverse range of 16S rRNA gene phylotypes was found in the sediments of both regions. These were represented by 11 different taxonomic groups, with Gammaproteobacteria predominating in the Northeastern Pacific Ocean sediments and Acidobacteria in the Eastern Mediterranean microbial community. In addition, several 16S rRNA gene phylotypes only distantly related to any of the previously identified sequences (non-affiliated rRNA genes) represented a significant fraction of the total sequences. The potential diversity at the two sites differs but remains largely unexplored and remains of continuing scientific interest. [Int Microbiol 2010; 13(3):143-150]

Biografies de l'autor/a

Ioanna Kouridaki, Department of Chemistry, University of Crete, Heraklion, Crete, Greece. Institute of Marine Biology and Genetics, Hellenic Centre for Marine Research, Heraklion, Crete, Greece.

Department of Chemistry, University of Crete, Heraklion, Crete, Greece.
Institute of Marine Biology and Genetics,
Hellenic Centre for Marine Research, Heraklion, Crete, Greece.

Paraskevi N. Polymenakou, Institute of Marine Biology and Genetics, Hellenic Centre for Marine Research, Heraklion, Crete, Greece

Institute of Marine Biology and Genetics,
Hellenic Centre for Marine Research, Heraklion, Crete, Greece

Anastasios Tselepides, Institute of Marine Biology and Genetics, Hellenic Centre for Marine Research, Heraklion, Crete, Greece. Department of Maritime Studies, University of Piraeus, Piraeus, Greece

Institute of Marine Biology and Genetics,
Hellenic Centre for Marine Research, Heraklion, Crete, Greece

Department of Maritime Studies, University of Piraeus, Piraeus, Greece

Manolis Mandalakis, Institute of Marine Biology and Genetics, Hellenic Centre for Marine Research, Heraklion, Crete, Greece

Institute of Marine Biology and Genetics,
Hellenic Centre for Marine Research, Heraklion, Crete, Greece

Kenneth L. Smith, Jr, Monterey Bay Aquarium Research Institute, Moss Landing, California, USA

Monterey Bay Aquarium Research Institute, Moss Landing, California, USA

Descàrregues

Publicat

2010-09-28

Número

Vol. 13 Núm. 3 (2010)

Secció

Articles

Llicència

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