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Description of diatoms from the Southwest to West Greenland coastal and open marine waters
Krawczyk, D.W.; Witkowski, A.; Waniek, J.J.; Wroniecki, M.; Harff, J. (2014). Description of diatoms from the Southwest to West Greenland coastal and open marine waters. Polar Biol. 37(11): 1589-1606. https://dx.doi.org/10.1007/s00300-014-1546-2
In: Polar Biology. Springer-Verlag: Berlin; Heidelberg. ISSN 0722-4060; e-ISSN 1432-2056
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| Trefwoorden |
Bacillariophyceae [WoRMS]
Marien/Kust |
| Author keywords |
Diatoms, West Greenland, Hydrographic conditions, Summer water stratification, West Greenland Current |
| Auteurs | | Top |
- Krawczyk, D.W.
- Witkowski, A.
- Waniek, J.J.
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| Abstract |
Detailed studies on sub-Arctic and Arctic marine diatom assemblages contribute to the understanding of spatial distribution patterns and their physical drivers. In this study, diatom species were analyzed from water samples collected with a Niskin bottle rosette combined with a CTD along the West Greenland coast (63°58′N–71°08′N and 50°49′W–59°06′W) during summer 2007. Diatom community was represented mainly by three genera Thalassiosira, Fragilariopsis, and Chaetoceros and linked to observed hydrographic and environmental conditions. Thalassiosira spp. were common in coastal waters (particularly Godthåbsfjord) and linked to increased surface water temperature, typical of summer water stratification in West Greenland. Fragilariopsis spp., along with other dominant species associated with higher geographic latitudes, dominated in Arctic fjords (Uummannaq Fjord-Qaumarujuk Fjord). These species generally characterized coastal waters influenced by melting sea ice and/or glacial ice. Chaetoceros spp. were linked to more saline open marine waters, particularly in the Davis Strait south of 70°N, probably corresponding to weaker water stratification and the influence of the West Greenland Current. The present paper provides new knowledge on diatom assemblages along a south–north climate gradient in West Greenland, which is necessary in order to understand how observed ocean-climate changes influence Arctic marine ecosystems. This study provides a reference for palaeoenvironmental reconstructions using diatom microfossils deposited in the West Greenland marine sediments |
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