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Applied and Environmental Microbiology, July 2000, p. 3102-3109, Vol. 66, No. 7
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Identification of 16S Ribosomal DNA-Defined Bacterial Populations
at a Shallow Submarine Hydrothermal Vent near Milos
Island (Greece)
Stefan M.
Sievert,1,*
Jan
Kuever,1,* and
Gerard
Muyzer2,
Department of
Microbiology1 and Molecular Ecology
Group,2 Max Planck Institute for Marine
Microbiology, D-28359 Bremen, Germany
Received 3 December 1999/Accepted 17 April 2000
In a recent publication (S. M. Sievert, T. Brinkhoff, G. Muyzer, W. Ziebis, and J. Kuever, Appl. Environ. Microbiol.
65:3834-3842, 1999) we described spatiotemporal changes in the
bacterial community structure at a shallow-water hydrothermal vent in
the Aegean Sea near the isle of Milos (Greece). Here we describe
identification and phylogenetic analysis of the predominant bacterial
populations at the vent site and their distribution at the vent
site as determined by sequencing of DNA molecules (bands) excised from
denaturing gradient gels. A total of 36 bands could be sequenced, and
there were representatives of eight major lineages of the domain
Bacteria. Cytophaga-Flavobacterium and
Acidobacterium were the most frequently retrieved bacterial
groups. Less than 33% of the sequences exhibited 90% or more identity
with cultivated organisms. The predominance of putative heterotrophic
populations in the sequences retrieved is explained by the input of
allochthonous organic matter at the vent site.
*
Corresponding authors. Mailing address: Max Planck
Institute for Marine Microbiology, Celsiusstr. 1, D-28359 Bremen,
Germany. Phone: 49-421-2028-738 (S. M. Sievert) and
49-421-2028-734 (J. Kuever). Fax: 49-421-2028580. E-mail:
ssievert{at}mpi-bremen.de (S. M. Sievert) and
jkuever{at}mpi-bremen.de (J. Kuever).

Present address: Netherlands Institute for Sea Research, NL-1790AB
Den Burg (Texel), The
Netherlands.
Applied and Environmental Microbiology, July 2000, p. 3102-3109, Vol. 66, No. 7
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
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