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| Titel |
Sub meso scale phytoplankton distribution in the North East Atlantic surface waters determined with an automated flow cytometer |
| VerfasserIn |
M. Thyssen, N. Garcia, M. Denis |
| 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 ; 6, no. 4 ; Nr. 6, no. 4 (2009-04-08), S.569-583 |
| Datensatznummer |
250003639
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| Publikation (Nr.) |
 copernicus.org/bg-6-569-2009.pdf |
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| Zusammenfassung |
| Phytoplankton cells in the size range ~1–50 μm were analysed in
surface waters using an automated flow cytometer, the Cytosub
(http://www.cytobuoy.com), from the Azores to the French Brittany during
spring 2007. The Cytosub records the pulse shape of the optical signals
generated by phytoplankton cells when intercepted by the laser beam. A total
of 6 distinct optical groups were resolved during the whole transect, and
the high frequency sampling (15 min) provided evidence for the cellular
cycle (based on cyclic changes in cell size and fluorescence) and
distribution changes linked to the different water characteristics crossed
in the North East Atlantic provinces. Nutrient concentrations and mixed
layer depth varied from west to east, with a decrease in the mixed layer
depth and high nutrient concentrations in the middle of the transect as well
as near the French coast. Data provided a link between the sub meso scale
processes and phytoplankton patchiness, some abundance variations due to the
cellular cycle can be pointed out. The high frequency spatial sampling
encompasses temporal variations of the phytoplankton abundance, offering a
better insight into phytoplankton distribution. |
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