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| Titel |
Flux variations and vertical distributions of siliceous Rhizaria (Radiolaria and Phaeodaria) in the western Arctic Ocean: indices of environmental changes |
| VerfasserIn |
T. Ikenoue, K. R. Bjørklund, S. B. Kruglikova, J. Onodera, K. Kimoto, N. Harada |
| 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 ; 12, no. 6 ; Nr. 12, no. 6 (2015-03-27), S.2019-2046 |
| Datensatznummer |
250117885
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| Publikation (Nr.) |
 copernicus.org/bg-12-2019-2015.pdf |
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| Zusammenfassung |
| The vertical distribution of radiolarians was investigated using a vertical
multiple plankton sampler (100–0, 250–100, 500–250, and 1000–500 m
water depths, 62 μm mesh size) at the Northwind Abyssal Plain and
southwestern Canada Basin in September 2013. To investigate seasonal
variations in the flux of radiolarians in relation to sea ice and water
masses, a time-series sediment trap system was moored at Station NAP
(75°00´ N, 162°00´ W; bottom depth 1975 m) in the
western Arctic Ocean during October 2010–September 2012. The radiolarian
flux was comparable to that in the North Pacific Ocean. Amphimelissa setosa was dominant during
the season with open water as well as at the beginning and end of the
seasons with sea-ice cover. During the sea-ice-cover season, however,
oligotrophic and cold-water-tolerant actinommids were dominant, productivity
of Radiolaria was lower, and species diversity was greater. These suggest
that the dynamics of sea ice are a major factor affecting the productivity,
distribution, and composition of the radiolarian fauna. |
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