| Autor: |
David B. Scott, S. Blasco, Trecia Schell, André Rochon |
| Rok vydání: |
2008 |
| Předmět: |
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| Zdroj: |
Journal of Marine Systems. 74:840-863 |
| ISSN: |
0924-7963 |
| DOI: |
10.1016/j.jmarsys.2008.01.008 |
| Popis: |
This paper presents new data on distribution patterns of modern benthic foraminifera and other microfossils from the Canadian Arctic, specifically the Beaufort Shelf and slope. The material was collected in June to August of 2004 and is the first of its kind in this area to be collected since 1970. We examined the smaller sizes (45–63µm) as well as N 63µm and discovered that many species had been severely underrepresented in previous studies. Deep sea forms, that had been overlooked previously, were common on the shelf; two species (Elphidiella arctica and Ammotium cassis) appeared in preliminary results to be indicators of methane seepage; and it was possible to make determinations of sea-ice coverage using a combination of foraminifera and tintinnids (planktic ciliates). Our data indicated the presence of many of the same species as previous studies from this area, but improved techniques of sample processing greatly increased the number of specimens and species found (particularly the small deep sea arctic species Buliminella hensoni and Bolivina arctica) which provide much more reliable data for paleoceanographic determinations. One of the primary objectives for this work was to provide baseline data to help determine paleo-ice cover; these data cover a broad range of conditions on the Beaufort Shelf that make it possible to achieve this objective as well as improving |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect