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Trans-Atlantic responses of Calanus finmarchicus populations to basin-scale forcing associated with the North Atlantic Oscillation
Greene, C.H.; Pershing, A.J.; Conversi, A.; Planque, B.; Hannah, C.; Sameoto, D.; Head, E.; Smith, P.C.; Reid, P.C.; Jossi, J.; Mountain, D.; Benfield, M.C.; Wiebe, P.H.; Durbin, E. (2003). Trans-Atlantic responses of Calanus finmarchicus populations to basin-scale forcing associated with the North Atlantic Oscillation. Prog. Oceanogr. 58(2-4): 301-312. https://dx.doi.org/10.1016/j.pocean.2003.08.009
In: Progress in Oceanography. Pergamon: Oxford,New York,. ISSN 0079-6611; e-ISSN 1873-4472
Also appears in:
Reid, P.C.; Matthews, J.B.L.; Smith, M.A. (Ed.) (2003). Achievements of the Continuous Plankton Recorder Survey and a vision for its future. Progress in Oceanography, 58(2-4). Elsevier: Amsterdam. 115-358 pp., more
Peer reviewed article  
Available in  Authors 
    Vlaams Instituut voor de Zee: Non-open access 54290 [ request ]
Keywords
Authors  Top 
  • Greene, C.H.
  • Pershing, A.J.
  • Conversi, A.
  • Planque, B.
  • Hannah, C.
  • Sameoto, D.
  • Head, E.
  • Smith, P.C.
  • Reid, P.C.
  • Jossi, J.
  • Mountain, D.
  • Benfield, M.C.
  • Wiebe, P.H.
  • Durbin, E.
Abstract
    Populations of the copepod species Calanus finmarchicus often dominate the springtime biomass and secondary production of shelf ecosystems throughout the North Atlantic Ocean. Recently, it has been hypothesised that interannual to interdecadal fluctuations observed in such populations are driven primarily by climate-associated changes in ocean circulation. Here, we compare evidence from the North Sea and Gulf of Maine/Western Scotian Shelf (GoM/WSS) linking fluctuations in C. finmarchicus abundance to changes in ocean circulation associated with the North Atlantic Oscillation (NAO). A particularly striking contrast emerges from this Trans-Atlantic comparison: whereas the North Sea C. finmarchicus population exhibits a negative correlation with the NAO index, the GoM/WSS population exhibits a more complex, positive association with the index. The physical processes underlying these contrasting population responses are discussed in the context of regional- to basin-scale circulation changes associated with the NAO.
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