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| Titel |
Springtime zooplankton size structure over the continental shelf of the Bay of Biscay |
| VerfasserIn |
P. Vandromme, E. Nogueira, M. Huret, Á. Lopez-Urrutia, G. González-Nuevo González, M. Sourisseau, P. Petitgas |
| 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 ; 10, no. 5 ; Nr. 10, no. 5 (2014-10-16), S.821-835 |
| Datensatznummer |
250117069
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| Publikation (Nr.) |
 copernicus.org/os-10-821-2014.pdf |
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| Zusammenfassung |
| Linking lower and higher trophic levels requires special focus on the
essential role played by mid-trophic levels, i.e., the zooplankton. One of
the most relevant pieces of information regarding zooplankton in terms of flux of
energy lies in its size structure. In this study, an extensive data set of
size measurements is presented, covering parts of the western European
continental shelf and slope, from the Galician coast to the Ushant front,
during the springs from 2005 to 2012. Zooplankton size spectra were estimated
using measurements carried out in situ with the Laser Optical Plankton
Counter (LOPC) and with an image analysis of WP2 net samples
(200 μm mesh size) performed following the ZooScan methodology. The
LOPC counts and sizes particles within 100–2000 μm of spherical
equivalent diameter (ESD), whereas the WP2/ZooScan allows for counting, sizing
and identification of zooplankton from ~ 400 μm ESD. The
difference between the LOPC (all particles) and the WP2/ZooScan (zooplankton
only) was assumed to provide the size distribution of non-living particles,
whose descriptors were related to a set of explanatory variables (including
physical, biological and geographic descriptors). A statistical correction
based on these explanatory variables was further applied to the LOPC size
distribution in order to remove the non-living particles part, and therefore
estimate the size distribution of zooplankton. This extensive data set
provides relevant information about the zooplankton size distribution
variability, productivity and trophic transfer efficiency in the pelagic
ecosystem of the Bay of Biscay at a regional and interannual scale. |
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