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Short-term under-ice variability of prokaryotic plankton communities in coastal Antarctic waters (Cape hallett, Ross sea)
- Source :
- 81 (2009): 491–500., info:cnr-pdr/source/autori:Celussi M. (a), Paoli A. (a), Crevatin E. (a), Bergamasco A. (b), Margotta F. (c), Saggiomo V. (c), Fonda Umani S. (d), Del Negro P. (a)/titolo:Short-term under-ice variability of prokaryotic plankton communities in coastal Antarctic waters (Cape Hallett, Ross Sea)/doi:/rivista:/anno:2009/pagina_da:491/pagina_a:500/intervallo_pagine:491–500/volume:81
- Publication Year :
- 2009
-
Abstract
- During the 2006 Italian Antarctic expedition a diel sampling was performed close to Cape Hallett (Ross Sea) during the Austral summer. Under-ice seawater samples (∼4 m) were collected every 2 h for 28 h in order to estimate prokaryotic processes' variability and community structure dynamics. Prokaryotic and viral abundances, exoenzymatic activities (β-glucosidase, chitinase, lipase, alkaline phosphatase and leucine aminopeptidase), prokaryotic carbon production ( 3 H -leucine incorporation) and community structure (Denaturing Gradient Gel Electrophoresis – DGGE fingerprints) were analysed. Results showed that the diel variability of the prokaryotic activity followed a variation in salinity, probably as a consequence of the periodical thawing of sea ice (driven by solar radiation and air temperature cycles), while negligible variation in viral and prokaryotic abundances occurred. The Bacterial and Archaeal community structures underwent an Operational Taxonomic Units (OTUs) temporal shift from the beginning to the end of the sampling, while Flavobacteria -specific primers highlighted high variations in this group possibly related to sea ice melting and substrate release.
- Subjects :
- 0106 biological sciences
Aquatic Science
Oceanography
01 natural sciences
03 medical and health sciences
Sea ice
14. Life underwater
Diel vertical migration
biogeochemical processes
0303 health sciences
geography
geography.geographical_feature_category
Bacteria
Flavobacteria
biology
030306 microbiology
Ecology
010604 marine biology & hydrobiology
Archaea
Community structure
Biogeochemistry
Plankton
biology.organism_classification
Seawater
PCRDGGE
Temperature gradient gel electrophoresis
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- 81 (2009): 491–500., info:cnr-pdr/source/autori:Celussi M. (a), Paoli A. (a), Crevatin E. (a), Bergamasco A. (b), Margotta F. (c), Saggiomo V. (c), Fonda Umani S. (d), Del Negro P. (a)/titolo:Short-term under-ice variability of prokaryotic plankton communities in coastal Antarctic waters (Cape Hallett, Ross Sea)/doi:/rivista:/anno:2009/pagina_da:491/pagina_a:500/intervallo_pagine:491–500/volume:81
- Accession number :
- edsair.doi.dedup.....a35cb1d8ecf4bb84b818894ed890ee4a