uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
A biological consequence of reducing Arctic ice cover: Arrival of the Pacific diatom Neodenticula seminae in the North Atlantic for the first time in 800000 years
Show others and affiliations
2007 (English)In: Global Change Biology, ISSN 1354-1013, E-ISSN 1365-2486, Vol. 13, no 9, 1910-1921 p.Article in journal (Refereed) Published
Abstract [en]

The Continuous Plankton Recorder survey has monitored plankton in the Northwest Atlantic at monthly intervals since 1962, with an interegnum between 1978 and 1990. In May 1999, large numbers of the Pacific diatom Neodenticula seminae were found in Continuous Plankton Recorder (CPR) samples in the Labrador Sea as the first record in the North Atlantic for more than 800 000 years. The event coincided with modifications in Arctic hydrography and circulation, increased flows of Pacific water into the Northwest Atlantic and in the previous year the exceptional occurrence of extensive ice-free water to the North of Canada. These observations indicate that N. seminae was carried in a pulse of Pacific water in 1998/early 1999 via the Canadian Arctic Archipelago and/or Fram Strait. The species occurred previously in the North Atlantic during the Pleistocene from∼1.2 to∼0.8 Ma as recorded in deep sea sediment cores. The reappearance of N. seminae in the North Atlantic is an indicator of the scale and speed of changes that are taking place in the Arctic and North Atlantic oceans as a consequence of regional climate warming. Because of the unusual nature of the event it appears that a threshold has been passed, marking a change in the circulation between the North Pacific and North Atlantic Oceans via the Arctic. Trans-Arctic migrations from the Pacific into the Atlantic are likely to occur increasingly over the next 100 years as Arctic ice continues to melt affecting Atlantic biodiversity and the biological pump with consequent feedbacks to the carbon cycle.

Place, publisher, year, edition, pages
2007. Vol. 13, no 9, 1910-1921 p.
Keyword [en]
Arctic, biological pump, continuous plankton recorder, CPR, deep sea cores, Neodenticula seminae, North Atlantic, North Pacific, phytoplankton, Pleistocene, subpolar gyre
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-14494DOI: 10.1111/j.1365-2486.2007.01413.xISI: 000249222800007OAI: oai:DiVA.org:uu-14494DiVA: diva2:42264
Available from: 2008-01-30 Created: 2008-01-30 Last updated: 2011-01-26Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Snoeijs, Pauli
By organisation
Ecological Botany
In the same journal
Global Change Biology
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 157 hits
ReferencesLink to record
Permanent link

Direct link