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| Titel |
Biogeography of planktonic bacterial communities across the whole Mediterranean Sea |
| VerfasserIn |
F. Mapelli, M. M. Varela, M. Barbato, R. Alvariño, M. Fusi, M. Álvarez, G. Merlino, D. Daffonchio, S. Borin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 9, no. 4 ; Nr. 9, no. 4 (2013-07-08), S.585-595 |
| Datensatznummer |
250018105
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| Publikation (Nr.) |
 copernicus.org/os-9-585-2013.pdf |
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| Zusammenfassung |
| Bacterial population distribution in the Mediterranean Sea has been mainly
studied by considering small geographical areas or specific phylogenetic
groups. The present study is a molecular microbiology investigation aimed
to identify the environmental factors driving total bacterioplankton
community composition of seawater samples collected along a transect
covering the whole Mediterranean Sea. We performed automated ribosomal
intergenic sequence analysis (ARISA) and microscope evaluation of
prokaryotic abundance of seawater sampled across both vertical profiles and
longitudinal transects in the whole basin. Prokaryotic abundance decreased
with depth at all the stations and presented similar values in epi-, meso-
and bathypelagic layers across the whole Mediterranean Sea. However,
peculiar bacterial assemblages were selected along a longitudinal transect
in the epipelagic layers of the eastern and western sub-basins. Vertical
differences of the bacterial communities were observed only when considering the
epi- and bathypelagic waters, while the study of the structure of bacterial
communities at a finer scale across the water column displayed higher
variability at the intermediate layers. Nonetheless, different
physico-chemical factors were significantly related to the distribution of
bacterial populations, both according to geographic position and down the
water column in the whole Mediterranean Sea. These results demonstrated that
bacterial assemblages are putatively correlated to different water masses of
the complex hydrographical systems of the eastern and western Mediterranean
sub-basins. |
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