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| Titel |
Similar patterns of patterns of community organization characterize distinct groups of different trophic levels in the plankton of the NW Mediterranean Sea |
| VerfasserIn |
V. Raybaud, A. Tunin-Ley, M. E. Ritchie, J. R. Dolan |
| 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. 3 ; Nr. 6, no. 3 (2009-03-18), S.431-438 |
| Datensatznummer |
250003535
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| Publikation (Nr.) |
 copernicus.org/bg-6-431-2009.pdf |
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| Zusammenfassung |
| Planktonic populations were sampled over a 4 week period in the NW
Mediterranean, at a site subject to little vertical advection during the
Dynaproc 2 cruise in 2004. The characteristics of the phytoplankton, the
tintinnid community and the zooplankton have recently been described in
detail. Based on these studies, we compared the characteristics of 3
well-circumscribed assemblages of different trophic levels: Ceratium of the
phytoplankton, herbivorous tintinnids of the microzooplankton, and large
(>500 μm) omnivorous and carnivorous copepods of the metazoan
zooplankton. In all three groups, diversity as H' or species richness, was
less variable than concentration of organisms. Plotting time against species
accumulation, the curves approached plateau values for Ceratium spp, tintinnids and
large copepods but only a small number of species were consistently present
(core species) and these accounted for most of the populations. For
Ceratium core species numbered 10, for tintinnids 11 species, and for large
copepods, core species numbered 4 during the day and 16 at night.
Ceratium, tintinnids and large copepods showed some similar patterns of community
structure in terms of species abundance distributions. Ceratium species were
distributed in a log-normal pattern. Tintinnid species showed a log-series
distribution. Large copepod assemblages were highly dominated with night
samples showing much higher abundances and greater species richness than day
samples. However, species abundance distributions were similar between day
and night and were mostly log-normal. The paradox of the plankton,
describing phytoplankton communities as super-saturated with species,
extends to the microzooplankton and zooplankton. |
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