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| Titel |
Phytoplankton distribution in unusually low sea ice cover over the Pacific Arctic |
| VerfasserIn |
P. Coupel, H. Y. Jin, M. Joo, R. Horner, H. A. Bouvet, M.-A. Sicre, J.-C. Gascard, J. F. Chen, V. Garçon, D. Ruiz-Pino |
| 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 ; 9, no. 11 ; Nr. 9, no. 11 (2012-11-26), S.4835-4850 |
| Datensatznummer |
250007415
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| Publikation (Nr.) |
 copernicus.org/bg-9-4835-2012.pdf |
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| Zusammenfassung |
| A large part of the Pacific Arctic basin experiences ice-free conditions in
summer as a result of sea ice cover steadily decreasing over the last
decades. To evaluate the impact of sea ice retreat on the marine ecosystem,
phytoplankton in situ observations were acquired over the Chukchi shelf and
the Canadian basin in 2008, a year of high melting. Pigment analyses and
taxonomy enumerations were used to characterise the distribution of main
phytoplanktonic groups. Marked spatial variability of the phytoplankton
distribution was observed in summer 2008. Comparison of eight phytoplankton
functional groups and 3 size-classes (pico-, nano- and micro-phytoplankton)
also showed significant differences in abundance, biomass and distribution
between summer of low ice cover (2008) and heavy ice summer (1994).
Environmental parameters such as freshening, stratification, light and
nutrient availability are discussed as possible causes to explain the
observed differences in phytoplankton community structure between 1994 and
2008. |
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