Niemi, Andrea; Michel, Christine; Hille, Kelly; Poulin, Michel (2011): Physicochemical characteristics and protist occurrence at stations sampled in 2007/2008 in the eastern Beaufort Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.817948, Supplement to: Niemi, A et al. (2011): Protist assemblages in winter sea ice: setting the stage for the spring ice algal bloom. Polar Biology, 34(12), 1803-1817, https://doi.org/10.1007/s00300-011-1059-1
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Abstract:
This study documents, for the first time, the abundance and species composition of protist assemblages in Arctic sea ice during the dark winter period. Lack of knowledge of sea-ice assemblages during the dark period has left questions about the retention and survival of protist species that initiate the ice algal bloom. Sea-ice and surface water samples were collected between December 27, 2007 and January 31, 2008 within the Cape Bathurst flaw lead, Canadian Beaufort Sea. Samples were analyzed for protist identification and counts, chlorophyll (chl) a, and total particulate carbon and nitrogen concentrations. Sea-ice chl a concentrations (max. 0.27 µg/l) and total protist abundances (max. 4 x 10**3 cells/l) were very low, indicating minimal retention of protists in the ice during winter. The diversity of winter ice protists (134 taxa) was comparable to spring ice assemblages. Pennate diatoms dominated the winter protist assemblage numerically (averaging 77% of total protist abundances), with Nitzschia frigida being the most abundant species. Only 56 taxa were identified in surface waters, where dinoflagellates were the dominant group. Our results indicate that differences in the timing of ice formation may have a greater impact on the abundance than structure of protist assemblages present in winter sea ice and at the onset of the spring ice algal bloom.
Project(s):
Coverage:
Median Latitude: 71.319499 * Median Longitude: -124.737685 * South-bound Latitude: 71.072000 * West-bound Longitude: -125.543500 * North-bound Latitude: 71.544900 * East-bound Longitude: -123.908500
Date/Time Start: 2007-12-21T00:00:00 * Date/Time End: 2008-01-27T00:00:00
Comment:
Part of the IPY Circumpolar Flaw Lead (CFL) Study. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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3 datasets
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Datasets listed in this publication series
- Niemi, A; Michel, C; Hille, K et al. (2011): (Table 2) Chlorophyll a, carbon and nitrogen concentration and protist abundance in samples obtained during a CCGS Amundsen cruise in 2007/2008. https://doi.org/10.1594/PANGAEA.817946
- Niemi, A; Michel, C; Hille, K et al. (2011): (Table 3) Protist occurrence in bottom sea ice and surface water samples obtained during a CCGS Amundsen cruise in 2007/2008. https://doi.org/10.1594/PANGAEA.817947
- Niemi, A; Michel, C; Hille, K et al. (2011): (Table 1) Sea ice characteristics at stations sampled during a CCGS Amundsen cruise in 2007/2008. https://doi.org/10.1594/PANGAEA.817945