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| Titel |
Interconnectivity vs. isolation of prokaryotic communities in European deep-sea mud volcanoes |
| VerfasserIn |
M. G. Pachiadaki, K. A. Kormas |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 5 ; Nr. 10, no. 5 (2013-05-02), S.2821-2831 |
| Datensatznummer |
250018224
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| Publikation (Nr.) |
 copernicus.org/bg-10-2821-2013.pdf |
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| Zusammenfassung |
| During the past two decades, European cold seep ecosystems have attracted
the scientific interest and to date there are several studies which have
investigated the community structure and biodiversity of individual sites.
In order to gain a better insight into the biology, biodiversity, and
biogeography of seep-associated microbial communities along Europe's
continental margins, a comparative approach was applied in the present work.
By exploiting the publicly available data on 16S rRNA gene sequences
retrieved from sediments of the Håkon Mosby mud volcano, Gulf of Cádiz
and the eastern Mediterranean mud volcanoes/pockmarks (Anaximander area and
Nile Fan), we investigated the prokaryotic biological components connecting
these geographically isolated systems. The construction of interaction
networks for both archaeal and bacterial shared operational taxonomic units
(OTUs) among the different sites, revealed the presence of persistent OTUs,
which can be considered as "key-players". One archaeal OTU (HQ588641)
belonging to the ANME-3 group and one δ-Proteobacteria (HQ588562)
were found in all five investigated areas. Other Archaea OTUs shared between
four sites or less, belonged to the ANME-2c, -2a, MBG-D, -B and
Thaumarchaeota. All other shared Bacteria belonged to the δ- and
γ-Proteobacteria, with the exception of one JS1 affiliate OTU. The
distribution of the majority of the shared OTUs seems to be restricted in
cold seeps, mud volcanoes and other marine methane-rich environments.
Although the investigated sites were connected through a small number of
OTUs, these microorganisms hold central ecophysiological roles in these
sediments, namely methane- and sulfur-mediated mineralization. |
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