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Environmental characteristics of Agulhas rings affect interocean plankton transport
Villar, E.; Farrant, G.K.; Follows, M.; Garczarek, L.; Speich, S.; Audic, S.; Bittner, L.; Blanke, B.; Brum, J.R.; Brunet, C.; Casotti, R.; Chase, A.; Dolan, J.R.; D'Ortenzio, F.; Gattuso, J.P.; Grimal, N.; Guidi, L.; Hill, C.N.; Jahn, O.; Jamet, J.-L.; Le Goff, H.; Lepoivre, C.; Malviya, S.; Pelletier, E.; Romagnan, J.-B.; Roux, S.; Santini, S.; Scalco, E.; Schwenck, S.M.; Tanaka, A.; Testor, P.; Vannier, T.; Vincent, F.; Zingone, A.; Dimier, C.; Picheral, M.; Searson, S.; Kandels-Lewis, S.; Acinas, S.G.; Bork, P.; Boss, E.; de Vargas, C.; Gorsky, G.; Ogata, H.; Pesant, S.; Sullivan, M.B.; Sunagawa, S.; Wincker, P.; Karsenti, E.; Bowler, C.; Not, F.; Hingamp, P.; Iudicone, D. (2015). Environmental characteristics of Agulhas rings affect interocean plankton transport. Science (Wash.) 348(6237): 11 pp. http://dx.doi.org/10.1126/science.1261447
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075; e-ISSN 1095-9203, more
Peer reviewed article  
Available in  Authors 
Keyword
    Marine/Coastal
Authors  Top 
  • Villar, E.
  • Farrant, G.K.
  • Follows, M.
  • Garczarek, L.
  • Speich, S.
  • Audic, S.
  • Bittner, L.
  • Blanke, B.
  • Brum, J.R.
  • Brunet, C., more
  • Casotti, R.
  • Chase, A.
  • Dolan, J.R., more
  • D'Ortenzio, F.
  • Gattuso, J.P., more
  • Grimal, N.
  • Guidi, L.
  • Hill, C.N.
  • Jahn, O.
  • Jamet, J.-L.
  • Le Goff, H.
  • Lepoivre, C.
  • Malviya, S.
  • Pelletier, E.
  • Romagnan, J.-B.
  • Roux, S.
  • Santini, S.
  • Scalco, E.
  • Schwenck, S.M.
  • Tanaka, A.
  • Testor, P.
  • Vannier, T.
  • Vincent, F.
  • Zingone, A., more
  • Dimier, C., more
  • Picheral, M.
  • Searson, S.
  • Kandels-Lewis, S.
  • Acinas, S.G.
  • Bork, P.
  • Boss, E.
  • de Vargas, C.
  • Gorsky, G., more
  • Ogata, H.
  • Pesant, S., more
  • Sullivan, M.B.
  • Sunagawa, S.
  • Wincker, P.
  • Karsenti, E.
  • Bowler, C.
  • Not, F.
  • Hingamp, P.
  • Iudicone, D.
Abstract
    Agulhas rings provide the principal route for ocean waters to circulate from the Indo-Pacific to the Atlantic basin. Their influence on global ocean circulation is well known, but their role in plankton transport is largely unexplored. We show that, although the coarse taxonomic structure of plankton communities is continuous across the Agulhas choke point, South Atlantic plankton diversity is altered compared with Indian Ocean source populations. Modeling and in situ sampling of a young Agulhas ring indicate that strong vertical mixing drives complex nitrogen cycling, shaping community metabolism and biogeochemical signatures as the ring and associated plankton transit westward. The peculiar local environment inside Agulhas rings may provide a selective mechanism contributing to the limited dispersal of Indian Ocean plankton populations into the Atlantic.
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