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| Titel |
Response of bacterioplankton community structure to an artificial gradient of pCO2 in the Arctic Ocean |
| VerfasserIn |
R. Zhang, X. Xia, S. C. K. Lau, C. Motegi, M. G. Weinbauer, N. Jiao |
| 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. 6 ; Nr. 10, no. 6 (2013-06-04), S.3679-3689 |
| Datensatznummer |
250018277
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| Publikation (Nr.) |
 copernicus.org/bg-10-3679-2013.pdf |
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| Zusammenfassung |
| In order to test the influences of ocean acidification on the ocean pelagic
ecosystem, so far the largest CO2 manipulation mesocosm study (European
Project on Ocean Acidification, EPOCA) was performed in Kings Bay
(Kongsfjorden), Spitsbergen. During a 30 day incubation, bacterial diversity
was investigated using DNA fingerprinting and clone library analysis of
bacterioplankton samples. Terminal restriction fragment length polymorphism
(T-RFLP) analysis of the PCR amplicons of the 16S rRNA genes revealed that
general bacterial diversity, taxonomic richness and community structure were
influenced by the variation of productivity during the time of incubation, but
not the degree of ocean acidification. A BIOENV analysis suggested a complex
control of bacterial community structure by various biological and chemical
environmental parameters. The maximum apparent diversity of bacterioplankton
(i.e., the number of T-RFs) in high and low pCO2 treatments differed
significantly. A negative relationship between the relative abundance of
Bacteroidetes and pCO2 levels was observed for samples at the
end of the experiment by the combination of T-RFLP and clone library
analysis. Our study suggests that ocean acidification affects the development
of bacterial assemblages and potentially impacts the ecological function of
the bacterioplankton in the marine ecosystem. |
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