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Paulsen, Maria Lund; Riisgaard, Karen; Nielsen, Torkel Gissel (2014): Abundance of bacteria and virus during the METEOR cruise M87/1. PANGAEA, https://doi.org/10.1594/PANGAEA.839415

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Abstract:
In temperate, subpolar and polar marine systems, the classical perception that bacteria are carbon limited by end of winter and respond in activity and abundance to the production of new carbon during the diatom spring bloom and post bloom. Contrary to this view, we here document an strong increase in bacterial abundance and activity (latter measured by increasing high nuclei acid (HNA) to low nuclei acid (LNA) bacteria ratio) during the winter-spring transition, where phytoplankton smaller than 10 µm dominate. Further DNA-virus were enumerated and revealed the virus to bacteria ratio (VBR) to be decreasing during winter-spring transition, indicating that the virus did not increase in number accordingly to bacteria. During repeated visits to stations in the deep Icelandic and the Norwegian Basins and the shallow Shetland Shelf (26 March to 29 April 2012), we investigated the abundance of bacteria and the succession of HNA:LNA bacteria and VBR. Water samples were collected from CTD rosette .10 L Niskin bottles and fixed in glutaraldehyde (final conc. 5%), flash frozen in liquid Nitrogen and stored at -80°C until analysis.
Funding:
Seventh Framework Programme (FP7), grant/award no. 264933: Basin Scale Analysis, Synthesis and Integration
Coverage:
Median Latitude: 61.684296 * Median Longitude: -5.505815 * South-bound Latitude: 60.332500 * West-bound Longitude: -11.027500 * North-bound Latitude: 62.833667 * East-bound Longitude: 1.000167
Date/Time Start: 2012-03-26T03:43:00 * Date/Time End: 2012-04-29T03:41:00
Minimum DEPTH, water: m * Maximum DEPTH, water: 1339 m
Event(s):
M87/1_421-1 (Station 1) * Latitude Start: 61.500333 * Longitude Start: -10.999833 * Latitude End: 61.500000 * Longitude End: -10.999833 * Date/Time Start: 2012-03-26T03:43:00 * Date/Time End: 2012-03-26T04:59:00 * Elevation: 0.0 m * Campaign: M87/1a (Deep Convection Cruise) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M87/1_424-1 (Station 1) * Latitude Start: 61.500000 * Longitude Start: -11.000000 * Latitude End: 61.500000 * Longitude End: -11.000000 * Date/Time Start: 2012-03-26T12:23:00 * Date/Time End: 2012-03-26T13:41:00 * Elevation: 0.0 m * Campaign: M87/1a (Deep Convection Cruise) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
M87/1_440-1 (Station 1) * Latitude Start: 61.500000 * Longitude Start: -10.999833 * Latitude End: 61.500000 * Longitude End: -10.999833 * Date/Time Start: 2012-03-28T04:06:00 * Date/Time End: 2012-03-28T05:30:00 * Elevation: 0.0 m * Campaign: M87/1a (Deep Convection Cruise) * Basis: Meteor (1986) * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Optional event labelEvent 2
3Latitude of eventLatitude
4Longitude of eventLongitude
5Date/Time of eventDate/Time
6DEPTH, waterDepth watermGeocode
7BacteriaBact#/mlPaulsen, Maria LundFACSCalibur flow-cytometer (Becton Dicinson)
8VirusVirus#/mlPaulsen, Maria LundFACSCalibur flow-cytometer (Becton Dicinson)
9High nucleic acid bacteria/low nucleic acid bacteria ratioHNA/LNAPaulsen, Maria LundFACSCalibur flow-cytometer (Becton Dicinson)
10Virus/bacteria ratioVBRPaulsen, Maria LundFACSCalibur flow-cytometer (Becton Dicinson)
Size:
697 data points

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