NDLI: Relationships between primary production and vertical particle export at the Atlantic-Arctic boundary (Fram Strait, HAUSGARTEN)

Content Provider	Springer Nature Link
Author	Forest, Alexandre Wassmann, Paul Slagstad, Dag Bauerfeind, Eduard Nöthig, Eva Maria Klages, Michael
Copyright Year	2010
Abstract	The lack of extended dataset has so far prevented an inclusive understanding of the long-term relationships between primary production (PP) and vertical export in the Arctic Ocean. It is urgent to investigate these connections as Arctic ecosystems are on the verge of climate-related shifts, which could be caused by the combined effects of increase in Pacific and Atlantic inflow, climate warming, and sea ice decline. For a period of 6 years we investigated the degree of coupling between PP and export by making use of modelled PP rates and vertical particle fluxes collected with sediment traps moored at ~300 m depth in the eastern Fram Strait. Our analyses indicate that total and new simulated PP averaged for different areas centered on the mooring location (5–200 km radius) explain at best 20–44% of the observed biogenic particle fluxes at 300 m, when applying extended time-lags (55–90 days) between PP and vertical fluxes. Based on this phasing, we define a conceptual framework that presents the temporal dimension as a prime determinant of the maximum strength of the PP-export coupling at a given depth. Our results support that planktonic food webs in the Fram Strait process heavily biogenic material in the epipelagic zone, but we further suggest that Atlantic-Arctic water interactions induce a particular ecological setting responsible for the extended turn-over. In conclusion, we hypothesize that global warming could promote a transition toward a more retentive ecosystem in the Fram Strait region despite the likely increase of pelagic PP in the Arctic Ocean.
Starting Page	1733
Ending Page	1746
Page Count	14
File Format	PDF
ISSN	07224060
Journal	Polar Biology
Volume Number	33
Issue Number	12
e-ISSN	14322056
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-06-29
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	production Vertical export Sediment trap Modelling Atlantification Arctic Ocean Zoology Ecology Plant Sciences Microbiology Oceanography
Content Type	Text
Resource Type	Article
Subject	Agricultural and Biological Sciences

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