Palynology from surface sediment samples of the Arctic Ocean, supplement to: Matthiessen, Jens; Kunz-Pirrung, Martina; Mudie, Peta J (2000): Freshwater chlorophycean algae from the Beaufort, Laptev and Kara Seas (Arctic Ocean) as indicators of river runoff. International Journal of Earth Sciences, 89(3), 470-485

DOI

Freshwater chlorophycean algae are characteristic organic-walled microfossils in recent coastal and shelf sediments from the Beaufort, Laptev and Kara seas (Arctic Ocean). The persistent occurrence of the chlorophycean algae Pediastrum spp. and Botryococcus cf. braunii in marine palynomorph assemblages is related to the discharge of freshwater and suspended matter from the large Siberian and North American rivers into the Arctic shelf seas. The distribution patterns of these algae in the marine environments reflect the predominant deposition of riverine sediments and organic matter along the salinity gradient from the outer estuaries and prodeltas to the shelf break. Sedimentary processes overprint the primary distribution of these algae. Resuspension of sediments by waves and bottom currents may transport sediments in the bottom nepheloid layer along the submarine channels to the shelf break. Bottom sediments and microfossils may be incorporated into sea ice during freeze-up in autumn and winter leading to an export from the shelves into the deep sea. The presence of these freshwater algae in sea-ice and bottom sediments in the central Arctic Ocean confirm that transport in sea ice is an important process which leads to a redistribution of shallow water microfossils.

Identifier
DOI http://dx.doi.org/doi:10.1594/PANGAEA.57869
Metadata Access http://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite3&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.57869
Provenance
Creator Matthiessen, Jens
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2000
Rights Creative Commons Attribution 3.0 Unported (CC-BY)
Representation
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Coverage
Discipline Earth System Research
Spatial Coverage (72N-74N,73E-83E)
Temporal Point 1997-09-14T11:59:59Z